CN106789630A - A kind of network protection method and system, controller, equipment - Google Patents
A kind of network protection method and system, controller, equipment Download PDFInfo
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- CN106789630A CN106789630A CN201611261273.7A CN201611261273A CN106789630A CN 106789630 A CN106789630 A CN 106789630A CN 201611261273 A CN201611261273 A CN 201611261273A CN 106789630 A CN106789630 A CN 106789630A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a kind of network protection method and system, controller, equipment, it is used to solve the problems, such as prior art service disconnection, improves the reliability of network.Network protection method includes：Controller receives the first warning information that the equipment in network is reported, and determines that the first link occurs disconnected fibre；Controller issues link flow table with link diagnosis mechanism and configures to equipment, until receiving the first feedback information of equipment transmission or receiving after Preset Time the second warning information of equipment transmission；First feedback information is to report controller after equipment creates the second link according to the link flow table configuration for receiving, and determines the available information of the second link by controller；Second warning information determines the disabled information of the second link for controller；After controller receives the first feedback information, flow table instruction is sent, flow table is instructed and replaces the first link, the first link of removal with the second link for control device, the second link is added into former protection group.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of network protection method and system, controller, equipment.
Background technology
Software defined network (Software Defined Network, SDN) is used as a kind of new network architecture, its core
The heart is to forward and control to separate, and realizes the centralized Control of network, quick deployment.Under SDN frameworks, had been moved in control plane
SDN controllers, SDN equipment carries out message forwarding according to the instruction of controller.
In the SDN for carrying the business such as set-off special line, reliability is one of core index of measurement network quality.Net
Network scale is bigger, bandwidth is bigger, and the requirement to network reliability is also higher.In existing protection technique, linear 1:1 protection
Technology is a kind of the most frequently used protected mode.Traditional linear 1:, it is necessary to set up work, two paths of protection in 1 protection technique.
After working path failure, failure is perceived by fast detection mechanism, be switched to Protection path.If operating path always cannot be extensive
It is multiple, and now Protection path breaks down will be can use without path again, and then cause service disconnection.
For example, as shown in figure 1, traditional linear 1:In 1 protection technique, if Protection path A->C->E breaks down,
Now only report and alarm, is left intact.If Protection path A->C->E failures are not recovered, and operating path A->B->E is again
Break down, may result in service disconnection.
For example, as shown in Fig. 2 traditional linear 1:In 1 protection technique, if operating path A->B->E breaks down,
Protection path A- can be switched to>C->E, if working path failure recovers, switchback is decided whether according to return pattern and WTR
With the time of switchback.But, if working path failure cannot recover, and now Protection path breaks down again, may result in
Service disconnection.
As network carrying amount is increasing, once there is this failure, consequence will be catastrophic, and network interruption is to visitor
The influence at family is immeasurable.For the abnormal scene of service disconnection, 1 in legacy network:1 linear protection cannot meet
Rigors of the present network to reliability.
The content of the invention
In view of this, a kind of network protection method and system, controller, equipment are the embodiment of the invention provides, is used to solve
Certainly the problem of prior art service disconnection, improves the reliability of network.
A kind of network protection method provided in an embodiment of the present invention, methods described includes：
Controller receives the first warning information that the equipment in the network is reported, and determines that the first link occurs disconnected fibre；Its
In, first warning information is that the equipment detects the information reported during first link down；
Controller issues the link flow table with link diagnosis mechanism and configures to the equipment, until receiving the equipment hair
The first feedback information for sending or the second warning information that the equipment transmission is received after Preset Time；First feedback letter
Cease and report the controller after creating the second link according to the link flow table configuration for receiving for the equipment, and by institute
State controller and determine the available information of the second link；Second warning information is the equipment according to the institute for receiving
State after the configuration of link flow table creates the second link and report the controller, and second link is determined by the controller
Disabled information；
After controller receives first feedback information, the flow table instruction for replacing is sent, the flow table instruction is used
First link, removal first link are replaced in the equipment second link is controlled and by described second
Link is added in the former protection group on the current device.
By network protection method provided in an embodiment of the present invention, controller is it is determined that there is disconnected fibre in the first link in the method
Afterwards, issue link flow table with link diagnosis mechanism to equipment to configure, equipment is according to the link flow table configuration establishment for receiving the
Two links, after controller receives the first feedback information, send the flow table instruction for replacing, and flow table is instructed for control device
The former protection replaced the first link with the second link, remove the first link and be added to the second link on the current device
In group, such embodiment of the present invention ensure that any moment all has two paths, can solve the problem that prior art service disconnection
Problem, improves the reliability of network.
It is preferred that first link is protection link or active link in the network；
When first link is for protection link, second link is the equipment according to the link for receiving
The new protection link that flow table configuration is created；
When first link is active link, second link is the equipment according to the link for receiving
The new active link that flow table configuration is created.
If it is preferred that first link is active link, what the equipment that the controller receives in the network was reported
After first warning information, before the first link of the determination occurs disconnected fibre, the method also includes：
The controller transmission link switch messages give the equipment, control the equipment that current business is switched into protection
Link.
It is preferred that removal first link, including：
The equipment is controlled to delete the Diagnosis of Links mechanism on first link on current device；
The equipment is controlled to delete flow table and group table on first link on current device.
It is preferred that the controller receives the first warning information that the equipment in the network is reported, the first link is determined
There is disconnected fibre, including：
After controller receives the first warning information that the equipment is reported, start timer, record first link
Fault time；
If in the timing of the timer, the controller is not received by the link failure that the equipment sends
The warning information of disappearance, it is determined that the first link occurs disconnected fibre.
The embodiment of the present invention additionally provides a kind of network protection method, and methods described includes：
Equipment in network sends warning information when detecting the first link down, and the warning information is reported into control
Device processed；
Equipment receives the configuration of the link flow table with link diagnosis mechanism that the controller is issued, and is matched somebody with somebody according to the link flow table
The second link of establishment is put, and to the feedback information of the controller report first or the second warning information；First feedback information
The controller is reported after creating the second link according to the link flow table configuration for receiving for the equipment, and by described
Controller determines the available information of the second link；Second warning information is the equipment according to what is received
The configuration of link flow table reports the controller after creating the second link, and determines second link not by the controller
Available information；
Equipment receives the flow table instruction for replacement that the controller sends, and is instructed with described second according to the flow table
Link replaces first link, removes first link, and second link is added on the current device
In former protection group；The flow table instruction receives the instruction sent after first feedback information for the controller.
It is preferred that first link is protection link or active link in the network；
When first link is for protection link, second link is the equipment according to the link for receiving
The new protection link that flow table configuration is created；
When first link is active link, second link is the equipment according to the link for receiving
The new active link that flow table configuration is created.
If it is preferred that first link is active link, it is described the warning information is reported into controller after, if
Before the configuration of the link flow table with link diagnosis mechanism that the standby reception controller is issued, the method also includes：
The equipment receives the link switchover information that controller sends, and is switched current business according to the link switchover information
To protection link.
It is preferred that described replace first link according to flow table instruction with second link, including：According to institute
State flow table instruction modification multiprotocol label switching rapid failure protection group table；
When first link is for protection link, the modification multiprotocol label switching rapid failure protection group table, bag
Include：
Protection path bucket in multiprotocol label switching rapid failure protection group table is modified to point to described second
The group table of link；
When first link is active link, the modification multiprotocol label switching rapid failure protection group table, bag
Include：
Operating path bucket in multiprotocol label switching rapid failure protection group table is modified to point to described second
The group table of link.
It is preferred that removal first link, including：
The equipment flow table on first link is set to it is aging immediately, and set up one can periodic wakeup appoint
Business, periodically updates flow table state and performs burnin operation, when the equipment has detected aging stream, completes first chain
The removal on road, and event notification information is sent to the controller.
The embodiment of the present invention additionally provides a kind of controller, and the controller includes：
Network state determining module, for receiving the first warning information that the equipment in the network is reported, determines first
There is disconnected fibre in link；Wherein, first warning information is that the equipment detects the letter reported during first link down
Breath；
Link establishment control module, for issuing the link flow table configuration with link diagnosis mechanism to the equipment, until
Receive the equipment the first feedback information for sending or the second alarm letter that the equipment transmission is received after Preset Time
Breath；First feedback information is to be reported after the equipment creates the second link according to the link flow table configuration for receiving
The controller, and the available information of the second link is determined by the controller；Second warning information is described
Equipment reports the controller after creating the second link according to the link flow table configuration for receiving, and by the controller
Determine the disabled information of the second link；
Link removes control module, after receiving first feedback information, sends the flow table instruction for replacing,
The flow table instruct for control the equipment second link replace first link, remove first link,
And second link is added in the former protection group on the current device.
It is preferred that first link is protection link or active link in the network；
When first link is for protection link, second link is the equipment according to the link for receiving
The new protection link that flow table configuration is created；
When first link is active link, second link is the equipment according to the link for receiving
The new active link that flow table configuration is created.
If it is preferred that first link is active link, the network state determining module is in the network is received
The first warning information for reporting of equipment after, before determining that the first link occurs disconnected fibre, be additionally operable to transmission link switch messages
To the equipment, control the equipment that current business is switched into protection link.
It is preferred that the link removes control module specifically for the flow table sent for replacement is instructed, and is set described in control
Diagnosis of Links mechanism on standby first link deleted on current device, and control the equipment to delete on current device
First link on flow table and group table.
It is preferred that the network state determining module is specifically for receiving the first warning information that the equipment is reported
Afterwards, start timer, record the first link failure time；If in the timing of the timer, being not received by
The warning information that the link failure that the equipment sends disappears, it is determined that the first link occurs disconnected fibre.
The embodiment of the present invention additionally provides a kind of equipment, and the equipment includes：
Warning information reporting module, warning information is sent for detecting during the first link down, and the alarm is believed
Breath reports controller；
Link establishment module, for receiving the configuration of the link flow table with link diagnosis mechanism that the controller is issued, root
The second link is created according to link flow table configuration, and to the feedback information of the controller report first or the second warning information；Institute
Described in being reported after stating the first feedback information to be the equipment creating the second link according to the link flow table configuration for receiving
Controller, and the available information of the second link is determined by the controller；；Second warning information is the equipment
Link flow table configuration according to receiving reports the controller after creating the second link, and is determined by the controller
Go out the disabled information of the second link；
Link replacement module, instructs, according to the flow table for receiving the flow table for replacing that the controller sends
Instruction second link replaces first link, removes first link, and second link is added to
In former protection group on the current device；The flow table instruction sends after receiving first feedback information for the controller
Instruction.
It is preferred that first link is protection link or active link in the network；
When first link is for protection link, second link is the equipment according to the link for receiving
The new protection link that flow table configuration is created；
When first link is active link, second link is the equipment according to the link for receiving
The new active link that flow table configuration is created.
If it is preferred that first link is active link, the warning information reporting module is by the warning information
Report after controller, the link establishment module is receiving the link flow with link diagnosis mechanism that the controller is issued
Before table configuration, the warning information reporting module is additionally operable to receive the link switchover information that controller sends, according to the link
Current business is switched to protection link by switch messages.
It is preferred that the link replacement module is specifically for quick according to the flow table instruction modification multiprotocol label switching
Fail safe group table；
When first link is for protection link, the modification multiprotocol label switching rapid failure protection group table, bag
Include：
Protection path bucket in multiprotocol label switching rapid failure protection group table is modified to point to described second
The group table of link；
When first link is active link, the modification multiprotocol label switching rapid failure protection group table, bag
Include：
Operating path bucket in multiprotocol label switching rapid failure protection group table is modified to point to described second
The group table of link.
It is preferred that the link replacement module specifically for, the flow table on first link is set to it is aging immediately, and
Set up one can periodic wakeup task, periodically update flow table state simultaneously perform burnin operation, it is aging when having detected
During stream, the removal of first link is completed, and send event notification information to the controller.
The embodiment of the present invention additionally provides a kind of network protection systems, including controller and some is connected with the controller
Equipment；
The controller, for receiving the first warning information that the equipment in the network is reported, determines that the first link is sent out
Raw disconnected fibre；Wherein, first warning information is that the equipment detects the information reported during first link down；And
For issuing the link flow table configuration with link diagnosis mechanism to the equipment, sent until receiving the equipment
The first feedback information or the second warning information that the equipment sends is received after Preset Time；First feedback information
The controller is reported after creating the second link according to the link flow table configuration for receiving for the equipment, and by described
Controller determines the available information of the second link；Second warning information is the equipment according to what is received
The configuration of link flow table reports the controller after creating the second link, and determines second link not by the controller
Available information；And
After receiving first feedback information, the flow table instruction for replacing is sent, the flow table is instructed and is used for
Control the equipment second link to replace first link, remove first link and by second chain
Road is added in the former protection group on the current device；
The equipment, warning information is sent for detecting during the first link down, and the warning information is reported
Controller；And
For receiving the configuration of the link flow table with link diagnosis mechanism that the controller is issued, matched somebody with somebody according to the link flow table
The second link of establishment is put, and to the feedback information of the controller report first or the second warning information；First feedback information
The controller is reported after creating the second link according to the link flow table configuration for receiving for the equipment, and by described
Controller determines the available information of the second link；；Second warning information is the equipment according to the institute for receiving
State after the configuration of link flow table creates the second link and report the controller, and second link is determined by the controller
Disabled information；And
Instructed for receiving the flow table for replacing that the controller sends, instructed with described second according to the flow table
Link replaces first link, removes first link, and second link is added on the current device
In former protection group；The flow table instruction receives the instruction sent after first feedback information for the controller.
Brief description of the drawings
Fig. 1 is prior art Protection path failure schematic diagram；
Fig. 2 is prior art working path failure schematic diagram；
Fig. 3 is SDN topological diagram；
Fig. 4 is a kind of network protection method flow chart provided in an embodiment of the present invention；
Fig. 5 is another network protection method flow chart provided in an embodiment of the present invention；
After the Protection path failure that Fig. 6 is provided for the embodiment of the present invention one, newly-built Protection path schematic diagram；
Fig. 7 is the newly-built Protection path workflow diagram that the embodiment of the present invention one is provided；
Fig. 8 is that the newly-built Protection path that the embodiment of the present invention one is provided extracts direction flow table composition；
Fig. 9 is the newly-built Protection path termination direction flow table composition that the embodiment of the present invention one is provided；
After the working path failure that Figure 10 is provided for the embodiment of the present invention two, newly-built operating path schematic diagram；
Figure 11 is the newly-built operating path workflow diagram that the embodiment of the present invention two is provided；
Figure 12 is that the newly-built operating path that the embodiment of the present invention two is provided extracts direction flow table composition；
Figure 13 is the newly-built operating path termination direction flow table composition that the embodiment of the present invention two is provided；
Figure 14 is a kind of structured flowchart of controller provided in an embodiment of the present invention；
Figure 15 is a kind of structured flowchart of equipment provided in an embodiment of the present invention；
Figure 16 is a kind of network protection systems structured flowchart provided in an embodiment of the present invention.
Specific embodiment
A kind of network protection method and system, controller, equipment are the embodiment of the invention provides, is used to solve prior art
The problem of service disconnection, improves the reliability of network.
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
One step ground is described in detail, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole implementation
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
All other embodiment, belongs to the scope of protection of the invention.
The specific embodiment of the invention is only illustrated and verifies under the framework of SDN, but its protection model for being illustrated
It is equally applicable on traditional network with technical thought.
SDN topological diagram under SDN frameworks is as shown in figure 3, SDN controllers control SDN equipment, figure by managing network
SDN equipment in 3 includes device A, equipment B, equipment C, equipment D and equipment E, SDN controller by SDN southbound interfaces to each
Equipment carries out business configuration.
OpenFlow agreements are SDN southbound interface agreements earliest, the most frequently used in the industry, but SDN does not limit southbound interface
Must be OpenFlow, the OpenFlow1.3.4 agreements of standard cannot meet support 1:The demand of 1 protection business, such as：Cannot match somebody with somebody
Put OAM, two-way converting detection (Bidirectional Forwarding Detection, BFD) etc. Diagnosis of Links mechanism, it is necessary to
Other southbound interfaces coordinate completion, and conventional is netconf agreements, common by OpenFlow agreements and netconf agreements
To carry out multiprotocol label switching (Multi-Protocol Label Switching, MPLS) basic service, OAM and protection phase
The configuration of pass.
As shown in figure 4, the specific embodiment of the invention provides a kind of network protection method, the method includes：
S401, controller receive the first warning information that the equipment in the network is reported, and determine that the first link occurs disconnected
It is fine；Wherein, first warning information is that the equipment detects the information reported during first link down；
S402, controller issue the link flow table with link diagnosis mechanism and configure to the equipment, described until receiving
The first feedback information or the second warning information that the equipment sends is received after Preset Time that equipment sends；Described first
Feedback information is to report the controller after the equipment creates the second link according to the link flow table configuration for receiving,
And the available information of the second link is determined by the controller；Second warning information is the equipment according to reception
To link flow table configuration create the second link after report the controller, and determine described the by the controller
The disabled information of two links；
After S403, controller receive first feedback information, the flow table instruction for replacing is sent, the flow table refers to
Make for controlling the equipment second link to replace first link, removing first link and by described in
Second link is added in the former protection group on the current device.
As shown in figure 5, the specific embodiment of the invention additionally provides another network protection method, including：
Equipment in S501, network sends warning information when detecting the first link down, and by the warning information
Offer controller；
S502, equipment receive the configuration of the link flow table with link diagnosis mechanism that the controller is issued, according to the link
Flow table configuration creates the second link, and to the feedback information of the controller report first or the second warning information；Described first is anti-
Feedforward information is to report the controller after the equipment creates the second link according to the link flow table configuration for receiving, and
The available information of second link is determined by the controller；Second warning information is the equipment according to receiving
Link flow table configuration create the second link after report the controller, and determine described second by the controller
The disabled information of link；
S503, equipment receive the flow table instruction for replacement that the controller sends, and institute is used according to flow table instruction
State the second link to replace first link, remove first link, and second link is added to this and currently set
In standby upper former protection group；The flow table instruction receives the instruction sent after first feedback information for the controller.
Specifically, the first link in the specific embodiment of the invention is protection link or active link；When the first link is
During protection link, the second link is the new protection link that equipment is created according to the link flow table configuration for receiving；When the first chain
When road is active link, the second link is the new active link that equipment is created according to the link flow table configuration for receiving.
Below in conjunction with the accompanying drawings and specific embodiment introduce the first link be respectively protection link and active link when feelings
Condition.
Embodiment one：
The first link in the specific embodiment of the invention one is protection link.
Specific embodiment of the invention business basic configuration step is as follows：
Step 1：SDN equipment and SDN controllers establish OpenFlow agreements and the connection of netconf agreements, each equipment
The resource information of itself is reported, the resource information for reporting is including flow table, group table, YANG etc.；
Step 2：After SDN controllers and SDN equipment complete connection, SDN controllers are by OpenFlow protocol definitions
Packet out and packet in message sends and receives LLDP messages, to complete the physical topology annexation of SDN equipment；
The forwarding of LLDP messages is same as the prior art, repeats no more here；
Step 3：Flow table, group table on device A configuration ethernet business of the SDN controllers by OpenFlow protocol definitions
Extract, ether network packet is encapsulated as MPLS messages；The label resources of SDN controllers the whole network under the overall leadership, distribute to every paths and mark
Sign；
Step 4：SDN controllers configure equipment B and equipment C by flow table, group table is used as intermediate P-node carries out MPLS label
Exchange；
Step 5：SDN controller configuration facilities E is MPLS business terminating node, and terminate MPLS messages, is descapsulated into original
Ether network packet；
Step 6：SDN controllers are by OpenFlow agreements such as netconf protocol configuration MPLS-TP OAM, BFD and protections
The resource that cannot be configured, creates work path and Protection path in device A and equipment E, while carrying out OAM on two paths
(or BFD) relevant configuration (3.3ms CC etc.).Because carrier class network needs to meet the switching time of 50ms, therefore CC messages are not
Transmitted by packet out/in message LLDP messages that can be as before, can only be configured according to SDN controllers by equipment
OAM (or BFD) information itself group bag sends and receives, to meet the requirement of performance.
By above business basic configuration step, SDN controllers have been completed basic MPLS business and OAM (or
BFD), relaying configuration, A- in Fig. 6>B->E is operating path, A->C->E is Protection path.After the completion of above-mentioned configuration, SDN
Equipment is all running Diagnosis of Links mechanism OAM (or BFD) on operating path and Protection path, using OAM (or BFD), SDN
Controller monitors the failure situation of operating path and Protection path simultaneously.
As shown in fig. 6, protection link A->C->E is the first link of the specific embodiment of the invention, protection link A->D->E
It is the second link that specific embodiment of the invention equipment is created, as protection link A->C->After E breaks down, device A and equipment E
Protection link A- will be detected>C->Link down warning information on E paths, and the warning information by netconf
Offer controller.
Controller controls the topological structure and resource of the whole network, finds protection link A->C->After E failures, make an immediate response,
The link failure disappearance alarm that equipment is reported is not received in Preset Time, then judges that link is faulty link, now passed through
OpenFlow agreements and netconf agreements issue the link flow table with link diagnosis mechanism and configure to equipment, and equipment is according to the chain
Road flow table configuration creates the protection link A- with link diagnosis mechanism>D->E, protection link A->D->The specific establishment process ginseng of E
See above-mentioned business basic configuration step.
As shown in Figure 6 and Figure 7, for device A, as protection link A->C->When E occurs disconnected fine, device A detects the event
Barrier, because business now also operates in active link, so need not now perform pretection switch.When the failure of link is protected
Between more than a threshold value FailTime (user can according to actual conditions configure FailTime) when, controller is then planned simultaneously again
Create the protection link A- with link diagnosis mechanism>D->E, by protection link A->D->The flow table and group table information of E are issued simultaneously
To equipment E, corresponding Tag switching rule is configured on equipment D.
During specific implementation, as shown in fig. 7, specific embodiment of the invention controller receives the first alarm letter that equipment is reported
Breath, determines that the first link occurs disconnected fibre, including：After controller receives the first warning information that equipment is reported, start timer,
Record protection link A->C->E fault times；If in the timing (FailTime) of timer, controller is not received by
The warning information that the link failure that equipment sends disappears, it is determined that protection link A->C->There is disconnected fibre in E.By the step, if
Protection link A->C->E recovers in the time internal fault of setting, then controller to equipment without issuing with link diagnosis mechanism
Link flow table is configured, it is not necessary to is created new protection link, is capable of the configuration of save resources.
Controller in Fig. 7 creates the establishment in the new protection link with OAM, refers to that controller determines new protection chain
The flow table configuration on road, and flow table configuration is sent to equipment, equipment performs corresponding action according to flow table parameter, completes final
Establishment.
The specific embodiment of the invention is by protecting link A->D->Diagnosis of Links mechanism on E judges protection link A->D->
Whether E can use, as protection link A->D->When E can use, to the feedback information of controller report first, it is anti-that controller receives first
After feedforward information, send and instructed to device A and equipment E for the flow table replaced, device A and equipment E are respectively according to the stream for receiving
Table instruction modification multiprotocol label switching rapid failure protection group table (mpls fast failover group), with protection link
A->D->E replaces protection link A->C->E.
As protection link A->D->When E is unavailable, to the warning information of controller report second, controller is again under equipment
The link flow table configuration of hair band Diagnosis of Links mechanism, equipment re-creates band link diagnosis mechanism after receiving the configuration of link flow table
Protection link A->D->E, until the time for re-creating is more than Preset Time (TryMax), then unsuccessfully returns to user feedback
Terminate after error code, can so avoid enter into the endless loop for constantly searching new route, exceed when the newly-built time attempted
During TryMax, controller is no longer attempt to newly-built protection link, it is believed that now network environment is poor, it is necessary to carry out necessary artificial dry
In advance.
Specifically, specific embodiment of the invention device A and equipment E are quick according to flow table instruction modification multiprotocol label switching
Fail safe group table, including：It is sensing by the Protection path tag modification in multiprotocol label switching rapid failure protection group table
Protection link A->D->The group table of E.
During specific implementation, as shown in figure 8, changing mpls fast failover group's in device A and equipment E
Protector path bucket point to newly-established protection link A->D->E group tables, such as the dotted arrow position institute in figure
Show.Fig. 8 represents the distribution situation of flow table and group table in final equipment, and the block diagram in figure in dotted line frame refers to the group table in equipment, its
It is partly flow table and physical port, and each block diagram is all the standard package in openflow, and each module completes certain
A configuration for business is realized in function, the combination of multiple modules, such as vlan this module is responsible for carrying out client traffic stream
Extract, the business based on vlan can be configured and extracted, mpls l22vpn.
Specifically, the specific embodiment of the invention removes protection link A->C->E, including：First, control device deletes protection
Link A->C->Diagnosis of Links mechanism on E；Then, control device deletes protection link A->C->Flow table and group table on E.
During specific implementation, as shown in figure 9, the specific embodiment of the invention removes protection link A->C->E, including：In termination
Direction from controller issued to device A and equipment E the related flow table of establishment business termination (including VLAN Table,
Termination MAC Table and MPLS Flow Table), top half flow table is newly-established flow table, dotted line frame in figure
In be original flow table and group table, newly-built flow table using and original flow table identical tunnel id, annunciator A and equipment E is
To the replacement operation of former flow table.
During specific implementation, as shown in figure 9, after the completion of the new flow table of extraction and termination direction is created, by device A and equipment
E original old flow table is set to it is aging immediately, and set up one can periodic wakeup task, in the specific embodiment of the invention
Cycle can use 1 second (s), periodically update flow table state and perform burnin operation.When aging stream is detected, to
Controller sends event notification information, and deletes local original old flow table, realizes the recovery of the resources such as label.
So, the specific embodiment of the invention ensure that any moment all has two paths, it is ensured that the reliability of network.
Embodiment two：
The first link in the specific embodiment of the invention two is active link.
As shown in Figure 10, active link A->B->E is the first link of the specific embodiment of the invention, active link A->D->
E is the second link that specific embodiment of the invention equipment is created, as active link A->B->After E breaks down, device A and equipment
E can detect active link A->B->Link down warning information on E paths, and the warning information is passed through netconf
Controller is reported, while business can be immediately switched to protection link A->C->E, and path switching state is passed through into netconf
Controller is reported, controller redistributes resource, issuing the link flow table with link diagnosis mechanism to equipment configures, equipment root
A new active link A- is created according to link flow table configuration>D->E, afterwards, controller control device deletes the work of failure
Link A->B->E, discharges related resource.
As shown in Figure 10 and Figure 11, for device A, as active link A->B->When E occurs disconnected fine, device A detects this
Failure, equipment receives the link switchover information that controller sends, and the MPLS Fast Failover groups tables in equipment can be by business
Stream is swung to the group surface low pointed to by protector group bucket and goes out device A.When the fault time of active link is more than one
During individual threshold value FailTime (user can configure FailTime according to actual conditions), controller is then planned and creates band chain again
The active link A- of road diagnosis mechanism>D->E, and by active link A->D->The flow table and group table information of E are issued to equipment simultaneously
E, configures corresponding Tag switching rule on equipment D.
Specifically, as shown in figure 11, specific embodiment of the invention controller receives the first warning information that equipment is reported,
Determine that the first link occurs disconnected fibre, including：
After controller receives the first warning information that equipment is reported, start timer, writing task link A->B->E events
Downtime；
Check timer time and active link A->B->E-state, if active link A->B->The fault time of E is more than pre-
If the time (FailTime), then controller judges that current ink failure is serious, it is necessary to set up new active link.That is active link
A->B->E recovers normal in Preset Time (FailTime), then directly terminate, and otherwise, controller creates band link diagnostic machine
The active link A- of system>D->E.
Controller in Figure 11 creates the establishment in the new active link with OAM, refers to that controller determines new work
The flow table configuration of link, and flow table configuration is sent to equipment, equipment performs corresponding action, completes most according to flow table parameter
Whole establishment.
Specifically, specific embodiment of the invention device A and equipment E are according to the flow table instruction modification multiprotocol label for receiving
Rapid failure protection group table is exchanged, active link A- is used>D->E replaces active link A->B->E.Specifically include：By multi-protocols mark
The operating path tag modification exchanged in rapid failure protection group table is signed to point to active link A->D->The group table of E.It is specific real
Shi Shi, as shown in figure 12, changes the worker path of mpls fast failover group in device A and equipment E
Bucket points to newly-established active link A->D->E group tables, as shown in the dotted arrow position in figure.
Specifically, the specific embodiment of the invention removes active link A->B->E, including：First, control device deletion work
Link A->B->Diagnosis of Links mechanism on E；Then, control device deletes active link A->B->Flow table and group table on E.
During specific implementation, as shown in figure 13, the specific embodiment of the invention removes active link A->B->E, including：In termination
Direction from controller issued to device A and equipment E the related flow table of establishment business termination (including VLAN Table,
Termination MAC Table and MPLS Flow Table), top half flow table is newly-established flow table, dotted line frame in figure
In be original flow table and group table, newly-built flow table using and original flow table identical tunnel id, annunciator A and equipment E is
To the replacement operation of former flow table.
During specific implementation, as shown in figure 13, when extracting and after the completion of the new flow table in termination direction is created, by device A and set
Standby E original old flow table is set to it is aging immediately, and set up one can periodic wakeup task, periodically update flow table shape
State simultaneously performs burnin operation.When aging stream is detected, event notification information is sent to controller, and delete local original
Old flow table, realizes the recovery of the resources such as label.
So, the specific embodiment of the invention ensure that any moment all has two paths, it is ensured that the reliability of network.
Therefore, the specific embodiment of the invention is 1 in traditional PTN, IPRAN network：In 1 linear protection technical foundation, it is based on
SDN frameworks realize " permanent protection " scheme in a kind of SDN, in office by SDN equipment and the coordinated of controller
When carve and all ensure that business has work, two paths of protection, service disconnection caused by path failure is ensure that to greatest extent, this
Also advantage of the SDN compared with legacy network is embodied.
Compared to traditional protection technique, " permanent protection " scheme obtains the reliability of the networks such as traditional PTN, IPRAN
Greatly lifted.Meanwhile, under SDN frameworks, to need to operate in originally move on to controller in the complex control plane in equipment, greatly
Equipment complexity is simplified greatly, the performance of equipment is optimized, while also further increasing stabilization of equipment performance.
As shown in figure 14, the specific embodiment of the invention additionally provides a kind of controller, and the controller includes：
Network state determining module 141, for receiving the first warning information that the equipment in the network is reported, determines
There is disconnected fibre in one link；Wherein, reported when the first warning information equipment detects first link down
Information；
Link establishment control module 142, for issuing the link flow table configuration with link diagnosis mechanism to the equipment, directly
The second alarm that the equipment sends is received to the first feedback information for receiving the equipment transmission or after Preset Time
Information；First feedback information is to be reported after the equipment creates the second link according to the link flow table configuration for receiving
To the controller, and the available information of the second link is determined by the controller；Second warning information is institute
State after equipment creates the second link according to the link flow table configuration for receiving and report the controller, and by the control
Device determines the disabled information of the second link；
Link removes control module 143, after receiving first feedback information, sends and refers to for the flow table replaced
Order, the flow table is instructed for controlling the equipment second link to replace first link, removing first chain
Road and second link is added in the former protection group on the current device.
Specifically, the link of the specific embodiment of the invention first is the protection link or active link in network；When the first chain
When road is for protection link, the second link is the new protection link that equipment is created according to the link flow table configuration for receiving；When
When one link is active link, the second link is the new active link that equipment is created according to the link flow table configuration for receiving.
Specifically, if the link of the specific embodiment of the invention first is active link, network state determining module 141 is being received
After the first warning information that equipment in the network is reported, before determining that the first link occurs disconnected fibre, send chain is additionally operable to
Road switch messages give the equipment, control the equipment that current business is switched into protection link.
Specifically, specific embodiment of the invention link removes control module 143 specifically for sending the flow table for replacing
Instruction, controls the equipment to delete the Diagnosis of Links mechanism on first link on current device, and set described in control
Flow table and group table on standby first link deleted on current device.
Specifically, specific embodiment of the invention network state determining module 141 reported specifically for, the equipment of receiving
After one warning information, start timer, recorded for the first link failure time；If in the timing of timer, without reception
To the warning information that the link failure that equipment sends disappears, it is determined that the first link occurs disconnected fibre.
As shown in figure 15, the specific embodiment of the invention additionally provides a kind of equipment, and the equipment includes：
Warning information reporting module 151, warning information is sent for detecting during the first link down, and by the alarm
Information reporting is to controller；
Link establishment module 152, for receiving the configuration of the link flow table with link diagnosis mechanism that the controller is issued,
Second link is created according to link flow table configuration, and to the feedback information of the controller report first or the second warning information；
First feedback information is to report institute after the equipment creates the second link according to the link flow table configuration for receiving
Controller is stated, and the available information of the second link is determined by the controller；；Second warning information sets for described
The controller is reported after standby configuration the second link of establishment according to the link flow table for receiving, and it is true by the controller
Make the disabled information of the second link；
Link replacement module 153, instructs, according to the stream for receiving the flow table for replacing that the controller sends
Table instruction second link replaces first link, removes first link, and second link is added
In the former protection group entered on the current device；The flow table instruction is sent out after receiving first feedback information for the controller
The instruction sent.
Specifically, if the specific embodiment of the invention first link is active link, warning information reporting module is being incited somebody to action
Warning information is reported after controller, and link establishment module is receiving the link flow with link diagnosis mechanism that controller is issued
Before table configuration, warning information reporting module is additionally operable to receive the link switchover information that controller sends, according to the link switchover
Current business is switched to protection link by information.
Specifically, specific embodiment of the invention link replacement module is specifically for according to flow table instruction modification multiprotocol label
Exchange rapid failure protection group table；When the first link is for protection link, multiprotocol label switching rapid failure protection group is changed
Table, including：Protection path bucket in multiprotocol label switching rapid failure protection group table is modified to point to the second link
Group table；When the first link is active link, multiprotocol label switching rapid failure protection group table is changed, including：To assist more
Operating path bucket in the view quick ineffective group table of Tag switching is modified to point to the group table of the second link.
Specifically, specific embodiment of the invention link replacement module 152 is specifically for the flow table on the first link is set to
It is aging immediately, and set up one can periodic wakeup task, periodically update flow table state simultaneously perform burnin operation, work as inspection
When having measured aging stream, the removal of first link is completed, and send event notification information to controller.
As shown in figure 16, the specific embodiment of the invention additionally provides a kind of network protection systems, if including controller 161 and
The dry equipment 162 being connected with controller；
Controller 161, for receiving the first warning information that the equipment in the network is reported, determines that the first link occurs disconnected
It is fine；Wherein, first warning information is that the equipment detects the information reported during first link down；And
For issuing the link flow table configuration with link diagnosis mechanism to the equipment, sent until receiving the equipment
The first feedback information or the second warning information that the equipment sends is received after Preset Time；First feedback information
The controller is reported after creating the second link according to the link flow table configuration for receiving for the equipment, and by described
Controller determines the available information of the second link；Second warning information is the equipment according to what is received
The configuration of link flow table reports the controller after creating the second link, and determines second link not by the controller
Available information；And
After receiving first feedback information, the flow table instruction for replacing is sent, the flow table is instructed and is used for
Control the equipment second link to replace first link, remove first link and by second chain
Road is added in the former protection group on the current device；
Equipment 162, warning information is sent for detecting during the first link down, and the warning information is reported into control
Device processed；And
For receiving the configuration of the link flow table with link diagnosis mechanism that the controller is issued, matched somebody with somebody according to the link flow table
The second link of establishment is put, and to the feedback information of the controller report first or the second warning information；First feedback information
The controller is reported after creating the second link according to the link flow table configuration for receiving for the equipment, and by described
Controller determines the available information of the second link；；Second warning information is the equipment according to the institute for receiving
State after the configuration of link flow table creates the second link and report the controller, and second link is determined by the controller
Disabled information；And
Instructed for receiving the flow table for replacing that the controller sends, instructed with described second according to the flow table
Link replaces first link, removes first link, and second link is added on the current device
In former protection group；The flow table instruction receives the instruction sent after first feedback information for the controller.
In sum, the specific embodiment of the invention provides a kind of network protection method, including：Controller is received in network
The first warning information that equipment is reported, determines that the first link occurs disconnected fibre；Wherein, the first warning information detects first for equipment
The information reported during link down；Controller issues the link flow table with link diagnosis mechanism and configures to equipment, until receiving
The first feedback information or the second warning information that equipment sends is received after Preset Time that equipment sends；First feedback information
Controller is reported after creating the second link according to the link flow table configuration for receiving for equipment, and second is determined by controller
The available information of link；Second warning information is to be reported after equipment creates the second link according to the link flow table configuration for receiving
Controller, and the disabled information of the second link is determined by controller；After controller receives the first feedback information, send and use
In replace flow table instruction, flow table instruct for control device with the second link replace the first link, removal the first link and
Second link is added in the former protection group on the current device.Specific embodiment of the invention controller is it is determined that the first link
After there is disconnected fibre, issue the link flow table with link diagnosis mechanism to equipment and configure, equipment is matched somebody with somebody according to the link flow table for receiving
The second link of establishment is put, after controller receives the first feedback information, the flow table instruction for replacing is sent, flow table is instructed to be used for
The second link of control device replaces the first link, removes the first link and the second link is added on the current device
Former protection group in, such specific embodiment of the invention ensure that any moment all exist two paths, can solve the problem that existing skill
The problem of art service disconnection, improves the reliability of network.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention
God and scope.So, if these modifications of the invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (21)
1. a kind of network protection method, it is characterised in that methods described includes：
Controller receives the first warning information that the equipment in the network is reported, and determines that the first link occurs disconnected fibre；Wherein, institute
It is that the equipment detects the information reported during first link down to state the first warning information；
Controller issues the link flow table with link diagnosis mechanism and configures to the equipment, until receiving what the equipment sent
First feedback information receives the second warning information that the equipment sends after Preset Time；First feedback information is
The equipment reports the controller after creating the second link according to the link flow table configuration for receiving, and by the control
Device processed determines the available information of the second link；Second warning information is the equipment according to the chain for receiving
Road flow table configuration reports the controller after creating the second link, and determines that second link can not by the controller
Information；
After controller receives first feedback information, the flow table instruction for replacing is sent, the flow table is instructed for controlling
The equipment second link is made to replace first link, remove first link and by second link
It is added in the former protection group on the current device.
2. method according to claim 1, it is characterised in that first link be protection link in the network or
Active link；
When first link is for protection link, second link is the equipment according to the link flow table for receiving
Configure the new protection link for creating；
When first link is active link, second link is the equipment according to the link flow table for receiving
Configure the new active link for creating.
3. method according to claim 2, it is characterised in that if first link is active link, the controller
Receive after the first warning information that the equipment in the network is reported, the determination the first link generation is broken before fibre, the party
Method also includes：
The controller transmission link switch messages give the equipment, control the equipment that current business is switched into protection chain
Road.
4. method according to claim 1, it is characterised in that removal first link, including：
The equipment is controlled to delete the Diagnosis of Links mechanism on first link on current device；
The equipment is controlled to delete flow table and group table on first link on current device.
5. method according to claim 1, it is characterised in that what the equipment that the controller receives in the network was reported
First warning information, determines that the first link occurs disconnected fibre, including：
After controller receives the first warning information that the equipment is reported, start timer, record first link failure
Time；
If in the timing of the timer, the controller is not received by the link failure disappearance that the equipment sends
Warning information, it is determined that there is disconnected fibre in the first link.
6. a kind of network protection method, it is characterised in that methods described includes：
Equipment in network sends warning information when detecting the first link down, and the warning information is reported into control
Device；
Equipment receives the configuration of the link flow table with link diagnosis mechanism that the controller is issued, and is configured according to the link flow table and created
The second link is built, and to the feedback information of the controller report first or the second warning information；First feedback information is institute
State after equipment creates the second link according to the link flow table configuration for receiving and report the controller, and by the control
Device determines the available information of the second link；Second warning information is the equipment according to the link for receiving
Flow table configuration reports the controller after creating the second link, and determines that second link is unavailable by the controller
Information；
Equipment receives the flow table instruction for replacement that the controller sends, and is instructed with second link according to the flow table
Replace first link, remove first link, and second link is added to the former guarantor on the current device
In shield group；The flow table instruction receives the instruction sent after first feedback information for the controller.
7. method according to claim 6, it is characterised in that first link be protection link in the network or
Active link；
When first link is for protection link, second link is the equipment according to the link flow table for receiving
Configure the new protection link for creating；
When first link is active link, second link is the equipment according to the link flow table for receiving
Configure the new active link for creating.
8. method according to claim 7, it is characterised in that if first link is active link, it is described will be described
Warning information is reported after controller, and equipment receives the configuration of the link flow table with link diagnosis mechanism that the controller is issued
Before, the method also includes：
The equipment receives the link switchover information that controller sends, and current business is switched into guarantor according to the link switchover information
Shield link.
9. method according to claim 6, it is characterised in that described to be replaced with second link according to flow table instruction
First link is changed, including：According to the flow table instruction modification multiprotocol label switching rapid failure protection group table；
When first link is for protection link, the modification multiprotocol label switching rapid failure protection group table, including：
Protection path bucket in multiprotocol label switching rapid failure protection group table is modified to point to second link
Group table；
When first link is active link, the modification multiprotocol label switching rapid failure protection group table, including：
Operating path bucket in multiprotocol label switching rapid failure protection group table is modified to point to second link
Group table.
10. method according to claim 6, it is characterised in that removal first link, including：
The equipment flow table on first link is set to it is aging immediately, and set up one can periodic wakeup task,
Periodically update flow table state and perform burnin operation, when the equipment has detected aging stream, complete first link
Removal, and send event notification information to the controller.
11. a kind of controllers, it is characterised in that the controller includes：
Network state determining module, for receiving the first warning information that the equipment in the network is reported, determines the first link
There is disconnected fibre；Wherein, first warning information is that the equipment detects the information reported during first link down；
Link establishment control module, for issuing the link flow table configuration with link diagnosis mechanism to the equipment, until receiving
The first feedback information sent to the equipment or the second warning information that the equipment transmission is received after Preset Time；Institute
Described in being reported after stating the first feedback information to be the equipment creating the second link according to the link flow table configuration for receiving
Controller, and the available information of the second link is determined by the controller；Second warning information is the equipment
Link flow table configuration according to receiving reports the controller after creating the second link, and is determined by the controller
Go out the disabled information of the second link；
Link removes control module, after receiving first feedback information, sends the flow table instruction for replacing, described
Flow table instructed for controlling the equipment second link to replace first link, remove first link and
Second link is added in the former protection group on the current device.
12. controllers according to claim 11, it is characterised in that first link is the protection chain in the network
Road or active link；
When first link is for protection link, second link is the equipment according to the link flow table for receiving
Configure the new protection link for creating；
When first link is active link, second link is the equipment according to the link flow table for receiving
Configure the new active link for creating.
13. controllers according to claim 12, it is characterised in that if first link is active link, the net
Network state determining module determines that the first link occurs disconnected after the first warning information that the equipment in receiving the network is reported
Before fibre, transmission link switch messages are additionally operable to the equipment, control the equipment that current business is switched into protection link.
14. controllers according to claim 11, it is characterised in that the link removes control module specifically for hair
Send the flow table for replacing to instruct, control the equipment to delete the Diagnosis of Links machine on first link on current device
System, and control the equipment to delete the flow table on first link on current device and group table.
15. controllers according to claim 11, it is characterised in that the network state determining module is specifically for connecing
After receiving the first warning information that the equipment is reported, start timer, record the first link failure time；If described
In the timing of timer, the warning information of the link failure disappearance that the equipment sends is not received by, it is determined that first
There is disconnected fibre in link.
16. a kind of equipment, it is characterised in that the equipment includes：
Warning information reporting module, warning information is sent for detecting during the first link down, and by the warning information
Offer controller；
Link establishment module, for receiving the configuration of the link flow table with link diagnosis mechanism that the controller is issued, according to this
The configuration of link flow table creates the second link, and to the feedback information of the controller report first or the second warning information；Described
One feedback information is to report the control after the equipment creates the second link according to the link flow table configuration for receiving
Device, and the available information of the second link is determined by the controller；；Second warning information be the equipment according to
The link flow table configuration for receiving reports the controller after creating the second link, and determines institute by the controller
State the disabled information of the second link；
Link replacement module, instructs for receiving the flow table for replacing that the controller sends, and is instructed according to the flow table
First link replaced with second link, remove first link, and second link is added to deserves
In former protection group in preceding equipment；The flow table instruction receives the finger sent after first feedback information for the controller
Order.
17. equipment according to claim 16, it is characterised in that first link is the protection link in the network
Or active link；
When first link is for protection link, second link is the equipment according to the link flow table for receiving
Configure the new protection link for creating；
When first link is active link, second link is the equipment according to the link flow table for receiving
Configure the new active link for creating.
18. equipment according to claim 17, it is characterised in that if first link is active link, the alarm
After the warning information is reported into controller, the link establishment module is receiving the controller to information reporting module
Before the configuration of the link flow table with link diagnosis mechanism for issuing, the warning information reporting module is additionally operable to receive controller hair
The link switchover information sent, protection link is switched to according to the link switchover information by current business.
19. equipment according to claim 16, it is characterised in that the link replacement module is specifically for according to the stream
Table instruction modification multiprotocol label switching rapid failure protection group table；
When first link is for protection link, the modification multiprotocol label switching rapid failure protection group table, including：
Protection path bucket in multiprotocol label switching rapid failure protection group table is modified to point to second link
Group table；
When first link is active link, the modification multiprotocol label switching rapid failure protection group table, including：
Operating path bucket in multiprotocol label switching rapid failure protection group table is modified to point to second link
Group table.
20. equipment according to claim 16, it is characterised in that the link replacement module is specifically for by described
Flow table on one link be set to it is aging immediately, and set up one can periodic wakeup task, periodically update flow table state
And perform burnin operation, when aging stream has been detected, complete the removal of first link, and send event notification information to
The controller.
21. a kind of network protection systems, it is characterised in that including controller and some equipment being connected with the controller；
The controller, for receiving the first warning information that the equipment in the network is reported, determines that the first link occurs disconnected
It is fine；Wherein, first warning information is that the equipment detects the information reported during first link down；And
For issuing the link flow table configuration with link diagnosis mechanism to the equipment, until receive that the equipment sends the
One feedback information receives the second warning information that the equipment sends after Preset Time；First feedback information is institute
State after equipment creates the second link according to the link flow table configuration for receiving and report the controller, and by the control
Device determines the available information of the second link；Second warning information is the equipment according to the link for receiving
Flow table configuration reports the controller after creating the second link, and determines that second link is unavailable by the controller
Information；And
After receiving first feedback information, the flow table instruction for replacing is sent, the flow table is instructed for controlling
The equipment second link replaces first link, removes first link and add second link
In adding the former protection group on the current device；
The equipment, warning information is sent for detecting during the first link down, and the warning information is reported into control
Device；And
For receiving the configuration of the link flow table with link diagnosis mechanism that the controller is issued, configured according to the link flow table and created
The second link is built, and to the feedback information of the controller report first or the second warning information；First feedback information is institute
State after equipment creates the second link according to the link flow table configuration for receiving and report the controller, and by the control
Device determines the available information of the second link；；Second warning information is the equipment according to the chain for receiving
Road flow table configuration reports the controller after creating the second link, and determines that second link can not by the controller
Information；And instructed for receiving the flow table for replacing that the controller sends, institute is used according to flow table instruction
State the second link to replace first link, remove first link, and second link is added to this and currently set
In standby upper former protection group；The flow table instruction receives the instruction sent after first feedback information for the controller.
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| CN109921987B (en) * | 2017-12-13 | 2022-01-21 | 中兴通讯股份有限公司 | BIER-TE network detection method, device and system |
| CN110113258A (en) * | 2019-04-23 | 2019-08-09 | 北京全路通信信号研究设计院集团有限公司 | Method and system for automatically protecting data plane link by using control plane link |
| CN110113258B (en) * | 2019-04-23 | 2024-03-26 | 北京全路通信信号研究设计院集团有限公司 | Method and system for automatically protecting data surface link by using control surface link |
| CN110430131A (en) * | 2019-07-25 | 2019-11-08 | 新华三技术有限公司合肥分公司 | A kind of message forwarding method and device |
| CN110430131B (en) * | 2019-07-25 | 2021-12-24 | 新华三技术有限公司合肥分公司 | Message forwarding method and device |
| CN113285871A (en) * | 2020-02-19 | 2021-08-20 | 中国电信股份有限公司 | Link protection method, SDN controller and communication network system |
| CN113285871B (en) * | 2020-02-19 | 2022-08-12 | 中国电信股份有限公司 | Link protection method, SDN controller and communication network system |
| CN112532532A (en) * | 2020-11-16 | 2021-03-19 | 烽火通信科技股份有限公司 | Service returning method, device, equipment and readable storage medium |
| CN112532532B (en) * | 2020-11-16 | 2022-08-12 | 烽火通信科技股份有限公司 | Service returning method, device, equipment and readable storage medium |
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