CN103795570B - The unicast message restoration methods and device of the stacked switchboard system of ring topology - Google Patents
The unicast message restoration methods and device of the stacked switchboard system of ring topology Download PDFInfo
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Abstract
The present invention provides a kind of unicast message restoration methods of the stacked switchboard system of ring topology, applies on member device, is interconnected between the member device by stacking opening, the described method includes：Using a stacking opening as the port for receiving message, spare forwarding route table is generated using another stacking opening as the port for sending message；To the unicast message identified without loopback, if the port for sending the message is the stacking opening of connecting fault point, addition loopback mark, will forward after the unicast message loopback for adding loopback mark according to spare forwarding route table；The unicast message with loopback mark to purpose member device for other member devices, forwards according to spare forwarding route table.Technical scheme reduces the time of flow interrupt when failure occurs, and improves the availability of stacked switchboard system.
Description
Technical field
The present invention relates to network communication technology field, more particularly to a kind of unicast of the stacked switchboard system of ring topology
Message restoration methods and device.
Background technology
IRF（Intelligent Resilient Framework, intelligent elastic framework）It is a kind of stacked switchboard system
Realize technology, using software virtualization technology, will at least two network equipments link together, carry out it is necessary with postponing, it is empty
Intend chemical conversion one " distributed apparatus ".The hardware resource and software processing of multiple devices can be gathered using this virtualization technology
Ability, realizes the collaborative work, unified management and uninterrupted maintenance of multiple devices.
IRF can streamlining management, upon formation, user can be logged in by the arbitrary port of any member device
IRF systems, are managed collectively all member devices in IRF.The high reliability of IRF is embodied in many aspects, such as：IRF
It is made of more member devices, Master（It is main）Equipment is responsible for the Operations, Administration and Maintenance of IRF, Slave（From）Equipment is in conduct
Can also processing business while backup；Once Master equipment faults, system can the new Master of rapid automatic election, with protect
Card business is not interrupted, it is achieved thereby that the 1 of equipment:N is backed up；In addition, the IRF links between member device support polymerizable functional,
Physical link between IRF and upper and lower layer equipment also supports polymerizable functional, and can backup each other between multilink can also be into
Row load balancing, so as to further increase the reliability of IRF.IRF has good extended capability, by increasing member device,
Port number, the bandwidth of IRF can easily be extended；, being capable of independent process agreement report because each member device has CPU
Text, carry out message forwarding, so IRF can also easily expanding treatment ability.
With the appearance and development of the new Network such as voice, video, the requirement of higher is proposed to the reliability of network.
Interruption of these business to flow is very sensitive, therefore, how to recover forwarding service as early as possible after breaking down, just becomes
IRF technology problems to be solved.
The content of the invention
In view of this, the present invention provides a kind of unicast message restoration methods of the stacked switchboard system of ring topology, should
With on the member device of the stacked switchboard system, the member device by two stacking openings be respectively connected to other into
Two in member's equipment, the described method includes：
It is spare to generate as the port for sending message using another stacking opening using a stacking opening as the port for receiving message
Forwarding route table；
To the unicast message identified without loopback, if the port for sending the message is the stacking opening of connecting fault point,
Loopback mark is added, will be forwarded after the unicast message loopback for adding loopback mark according to spare forwarding route table；
The unicast message with loopback mark to purpose member device for other member devices, according to spare forward-path
Table forwards.
Present invention also offers a kind of unicast message recovery device of the stacked switchboard system of ring topology, apply in institute
State on the member device of stacked switchboard system, the member device is respectively connected to other member devices by two stacking openings
In two, described device includes：
Spare forwarding route table generation unit, for using a stacking opening as the port for receiving message, being stacked with another
Mouthful generate spare forwarding route table to send the port of message；
Loopback unit, for the unicast message to being identified without loopback, if the port for sending the message is connection event
Hinder the stacking opening of point, addition loopback mark, will turn after the unicast message loopback for adding loopback mark according to spare forwarding route table
Hair；
Loopback retransmission unit, for the unicast report with loopback mark to purpose member device for other member devices
Text, forwards according to spare forwarding route table.
By above technical scheme as it can be seen that the embodiment of the present invention is added by that will need by the unicast message that trouble point forwards
After adding loop back flag, according to spare forwarding route table, from another chain road direction of ring topology, its purpose member device is sent, real
The fast quick-recovery of unicast service after failure occurs is showed, has reduced the time of flow interrupt, improve stacked switchboard system
Availability.
Brief description of the drawings
Fig. 1 is a kind of ring topology connection exemplary plot of stacked switchboard system；
Fig. 2 is the unicast message restoration methods flow of the stacked switchboard system of ring topology in the embodiment of the present invention one
Figure；
Fig. 3 is the flow chart of message unicast forwarding on member device in the embodiment of the present invention two；
Fig. 4 is a kind of hardware structure diagram of the member device of stacked switchboard system；
Fig. 5 is a kind of logical construction of the unicast message recovery device of the stacked switchboard system of ring topology in the present invention
Figure.
Embodiment
The realization of IRF is divided into two ways：Software I RF and Hardware I RF.In software I RF, across the data traffic of member device
During forwarding, message forwarding information can not be carried to other member devices, and message is required for re-starting by each member device
Entry lookup and forwarding.In Hardware I RF, connected between member device by the stacking opening with specific function, pass through stacking opening energy
Enough descriptor information（Determine the information how message forwards）Other member devices are carried to, are believed in IRF according to descriptor
Breath is forwarded to.
Stacking opening is the port for being used between member device interconnect on member device, is a kind of logic interfacing.One stacking
Mouth may correspond to a physical port, it is also possible to polymerize by multiple physical ports and formed, to reach enhancing bandwidth and link backup
Effect.
Two kinds of topologys of generally use between the member device of IRF：Chain topological sum ring topology.Chain row topology is by each member
Equipment is sequentially connected bunchiness；Two stacking openings of each member device heap with two other member device respectively in ring topology
Folded mouth is connected, all member devices connection cyclization.Ring topology is more more reliable than chain topology, when there is chain in chain topology
During the failure of road, IRF can be caused to divide；And in ring topology during certain link failure, chain topology can be formed, the business of IRF is not
It can be affected.Interface channel between the stacking opening of two member devices is known as IRF links.
In IRF, each member device and neighbours' member device collect whole IRF by interaction IRF hello packet
Topology.IRF hello packet can carry topology information, including stacking opening connection relation, member device are numbered, member device is excellent
The contents such as first level.Each member device topology information known to local record and by known topology information periodically from heap
Folded mouth is sent, and after the topology information of neighbours is received, updates the topology information of local record, in this way, all member devices
Complete topology information will be collected into.
According in the topology information being collected into, each member device both knows about message will be from which the stacking opening forwarding of oneself
Go out to get to some other member device, so as to generate frame level forwarding table.For example, in the IRF shown in Fig. 1, Cheng Yuanshe
Standby 10, member device 20, member device 30 and member device 40 are connected as the hard of ring topology by respective two stacking openings
Part IRF, wherein, it is directly connected to respectively by IRF links between member device 10 and member device 20, member device 40, member
It is directly connected to respectively by IRF links between equipment 30 and member device 20, member device 40.It is complete in topology information collection
Afterwards, the frame level forwarding table on member device 10 is as shown in table 1：
| Purpose member device is numbered | Stack slogan | Frame hop count |
| Member device 10 | NULL | 0 |
| Member device 20 | Stacking opening -10-20 | 1 |
| Member device 30 | Stacking opening -10-20 | 2 |
| Member device 40 | Stacking opening -10-40 | 1 |
Table 1
Wherein, purpose member device numbering is the numbering that message leaves last member device before IRF；Stack slogan
It is the numbering for the stacking opening for forwarding the message on this member device, its value represents that this member device is the message for NULL
Last member device before IRF is left, which will be forwarded by user port rather than stacking opening；Frame hop count is arrival
The message leave last member device before IRF also need to by hop count.
In hardware pile system, for message when entering IRF, the member device for receiving the message searches forwarding-table item, such as
The fruit message leaves the destination interface of IRF on other member devices, can increase descriptor information, descriptor information in messages
Including purpose member device, destination interface and other control information, wherein destination interface is that purpose member device turns the message
Send the user port of IRF.In this way, message can be forwarded in IRF systems by descriptor information and the frame level of member device
Table is forwarded to.After member device where message reaches destination interface, member device where destination interface deletes message
In descriptor information, forward it to purpose user port.
In the prior art, when breaking down in IRF systems, such as some member device failure or certain IRF link failure,
After the member device being directly connected to trouble point perceives failure generation, the message to break down can be broadcast to its in IRF
His member device.Still by taking the IRF in Fig. 1 as an example, if the IRF link downs between member device 20 and member device 30, into
Member's equipment 20 can broadcast the message of " member device 30 is unreachable ", and member device 30 can also broadcast " member device 20 is unreachable "
Message, receives the topology information of the member device renewal local record of these message, is locally recorded when on each member device
Topology information reach again and stablize after, just can update frame level forwarding table according to new topology information.It is and complete in frame level forwarding table
Into before renewal, each member device E-Packets still according to original frame level forwarding table, for example, to purpose member device
The message that numbering is 30, member device 10 still send it to member device 20 according to local frame level forwarding table；Member device
20 search local frame level forwarding table, it is found that member device 30 is unreachable, then by the packet loss.In this way, result in sending out
In this considerable time section that existing failure is completed to the renewal of frame level forwarding table, there is the interruption of flow.
The embodiment of the present invention one proposes a kind of unicast message restoration methods of the stacked switchboard system of ring topology to solve
The certainly above problem.The method of embodiment one is applied on the member device of stacked switchboard system, in the stacked switchboard system
Two stacking openings of each member device are connected with the stacking opening of other member devices respectively so that whole stacked switchboard system
It is connected as ring topology.The flow of embodiment one is as shown in Figure 2.
In step S210, using a stacking opening as the port for receiving message, the end using another stacking opening as transmission message
Mouthful generate spare forwarding route table.
Spare forwarding route tables are generated with two stacking openings on each member device of IRF, using a stacking opening to connect
The port of receiving text, and another stacking opening then becomes the port for sending message.In this way, the spare forwarding road of each member device
Footpath table includes 2 records, and the stacking opening that message is received in the 1st article of record is that the stacking opening of message is sent in the 2nd article of record, and
The port that message is sent in 1st article of record is the stacking opening that message is received in the 2nd article of record.
By taking the IRF shown in Fig. 1 as an example, the spare forwarding route table generated on member device 10 is as shown in table 2：
| Receive the stacking opening of message | Send the stacking opening of message |
| Stacking opening 10-20 | Stacking opening 10-40 |
| Stacking opening 10-40 | Stacking opening 10-20 |
Table 2
The spare forwarding route table generated on member device 20 is as shown in table 3：
| Receive the stacking opening of message | Send the stacking opening of message |
| Stacking opening 20-10 | Stacking opening 20-30 |
| Stacking opening 20-30 | Stacking opening 20-10 |
Table 3
Spare forwarding route table on member device 30 and member device 40 can refer to table 2 and table 3 is released, and repeat no more.
In step S220, to the unicast message identified without loopback, if the port for sending the message is connecting fault
The stacking opening of point, addition loopback mark, will forward after the unicast message loopback for adding loopback mark according to spare forwarding route table.
After IRF system jams, the member device that is directly connected to trouble point can quick sensing to failure.With
On the member device that trouble point is directly connected to, to the unicast message identified without loopback, i.e., conventional is forwarded to by IRF
Unicast message, be then message addition loopback mark, and ring will be added if necessary to be sent from the stacking opening of connecting fault point
The message of mark is returned from the stacking opening internal loopback of connecting fault point.After internal loopback, to the member device of connecting fault point and
Speech, the stacking opening of connecting fault point are to receive the stacking opening of the unicast message after internal loopback, and the member of connecting fault point sets
It is standby to search spare forwarding route table accordingly, another stacking opening is found to send the port of message, then will add loopback mark
Message from another stacking opening send.
In a kind of optional embodiment, loopback can be identified to addition in descriptor information, in descriptor information
Middle one setting field of increase represents whether this unicast message is loopback message by trouble point.
In step S230, the unicast message with loopback mark to purpose member device for other member devices, according to
Spare forwarding route table forwarding.
If some member device is identified from a received unicast message of stacking opening with loopback, and the mesh of the message
Member device be not this equipment, then after searching spare forwarding route table, the message is sent from another stacking opening.
There is no sequential relationship between above-mentioned steps S220 and step S230.
It is the unicast message of this member device to purpose member device in the present embodiment, no matter whether it carries loopback mark
Know, all sent from the user port of this member device, forward the packet out IRF.
It is other member devices to purpose member device, and the unicast message identified without loopback, according to existing skill
Art, is forwarded to according to frame level forwarding table.
It is other member devices and the unicast message identified with loopback to purpose member device, if searched spare
After forwarding route table, the stacking opening for sending the message is the port of connecting fault point, then the message is dropped because that can not send.
It is probably to occur at least two trouble points in IRF at this time, it is also possible to which the purpose member device of the message breaks down, and causes this
Message can not be forwarded successfully.
It should be noted that IRF failures and according to it is spare forwarded routing table forwarding loopback message while, still may be used
To carry out topology information renewal and the renewal of frame level forwarding table according to the prior art.After the completion of the renewal of frame level forwarding table, normally
Message forwarding path can avoid trouble point, there will be no the heap needed without the message of loopback mark from connecting fault point at this time
Folded mouth is sent, and each member device can complete message forwarding capability according to frame level forwarding table.
After the method for the present embodiment, after breaking down in IRF, the member device of connecting fault point will not be abandoned and needed
The unicast message normally to be forwarded from the stacking opening of connecting fault point, but in being carried out after loopback mark is added in unicast message
Portion's loopback, and continue to send the message toward purpose member by another link of ring topology according to spare forwarding route table
Equipment, greatly reduces the time that unicast data flow interrupts in forwarding table renewal process caused by IRF failures, improves
The availability of stacked switchboard system.
Still by taking the stacked switchboard system IRF in Fig. 1 as an example, the IRF links between member device 20 and member device 30
Interrupt, the member device 20 normally to E-Packet perceives failure, its stacking opening 20-30 is the port of connecting fault point.
One enters the unicast message of IRF, its destination interface on member device 30 by member device 10（At this time the unicast message without
There is loopback mark）, sent by member device 10 according to its frame level forwarding table table 1 to member device 20.Member device 20 searches this
The frame level forwarding table on ground, the port for finding to send the unicast message is stacking opening 20-30, then adds loopback mark in messages simultaneously
Carry out internal loopback.After internal loopback, the unicast message with loopback mark, purpose member device be member device 30, then into
Member's equipment 20 searches spare forwarding route table, according to port --- the stacking opening 20-30 for receiving the message（That is loopback port）, look for
To send the unicast message port be stacking opening 20-10, then be sent to member device from stacking opening 20-10 by the unicast message
10.After member device 10 and member device 40 forward the unicast message according to spare forwarding route table, which reaches
Its purpose member device --- member device 30, and forwarded by member device 30 from user port.
The embodiment of the present invention two provides a kind of idiographic flow that unicast message forwarding is carried out on member device.Need
Bright, the premise of below scheme has at 2 points：One first generates spare forwarding route table, generating mode and in embodiment one one
Cause, repeat no more；The second is member device, which once perceives some stacking opening, is connected to trouble point, the stacking opening is marked immediately
For loopback port.
Fig. 3 is referred to, in step S310, member device receives unicast message；
In step S320, member device judges that the purpose member device of the message is this equipment, if so, being forwarded to user
Port, if not, performing step S330；
In step S330, member device judges whether the unicast message identifies with loopback, if so, going to step S370；
If not, perform step S340；
In step S340, member device search box level forwarding table, finds the stacking opening for sending the unicast message；
In step S350, whether the stacking opening that member device judges to send the message is marked as loopback port, if so,
Go to step S360；If not, send the unicast message；
In step S360, after member device adds loopback mark in the unicast message, from loopback port, inner loop postbacks
Send the unicast message that with the addition of loopback mark；
In step S370, member device searches backup path forwarding table, finds and sends the unicast message with loopback mark
Stacking opening and transmission.If the port has been marked as loopback port, the message is abandoned.
It is corresponding with the realization of above-mentioned flow, present embodiments provide a kind of unicast report of the stacked switchboard system of ring topology
Literary recovery device, operates on the member device of stacked switchboard system, which can be realized by software, can also pass through
The mode of hardware or software and hardware combining is realized.Exemplified by implemented in software, as the device on a logical meaning, the present embodiment
It is to read to run in memory by the wherein corresponding computer program instructions of non-volatile memories by the CPU of member device to be formed
's.For hardware view, in addition to the CPU shown in Fig. 4, memory and nonvolatile memory, member device is usually also
Including other hardware, the forwarding chip of such as responsible processing Message processing；From hardware configuration the equipment be also possible to be
Distributed equipment, may include multiple interface cards to carry out the extension of Message processing in hardware view.
Fig. 5 show a kind of list of the business stacked switchboard system of the Hardware I RF of ring topology provided in this embodiment
Literary recovery device is reported, is applied on the member device of the IRF stacked switchboard systems, the member device passes through two heaps
Folded mouth is respectively connected to two in other member devices, which includes spare forwarding route table generation unit, loopback unit
With loopback retransmission unit, wherein：Spare forwarding route table generation unit is used for using a stacking opening as the port for receiving message, with
Another stacking opening generates spare forwarding route table to send the port of message；Loopback unit is used for being identified without loopback
Unicast message, if the port for sending the message is the stacking opening of connecting fault point, addition loopback mark, will add loopback mark
Forwarded after the unicast message loopback of knowledge according to spare forwarding route table；It is other to purpose member device that loopback retransmission unit, which is used for,
The unicast message with loopback mark of member device, forwards according to spare forwarding route table.
Described device further includes destination interface retransmission unit, for purpose member device be this equipment unicast message,
Sent from user port.
Described device can also include stacking retransmission unit, for purpose member device for other member devices without
There is the unicast message that loopback identifies, sent according to frame level forwarding table.
In a kind of optional embodiment, the loopback mark is located in descriptor information.
Described device can also include loopback discarding unit, for sending the port of the unicast message with loopback mark
When being the stacking opening of connecting fault point, the message is abandoned.
From the embodiment of any of the above method and apparatus as can be seen that relative to the prior art in frame level forwarding table more
It is new complete before abandon the unicast message forwarded by trouble point, it is of the invention in each embodiment will need list by trouble point
Report literary loopback to send, it is reached purpose member device by another link of ring topology so that in frame level forwarding table
Unicast service operates as usual before renewal is completed, and reduces the time of fault recovery, improves the availability of stacked switchboard system.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God and any modification, equivalent substitution, improvement and etc. within principle, done, should be included within the scope of protection of the invention.
Claims (8)
1. a kind of unicast message restoration methods of the stacked switchboard system of ring topology, are applied in the stacked switchboard system
Member device on, the member device is respectively connected to two in other member devices by two stacking openings, its feature
It is, the described method includes：
Using a stacking opening as the port for receiving message, spare forwarding is generated using another stacking opening as the port for sending message
Routing table；
After breaking down in IRF, before frame level forwarding table completes renewal, to the unicast message identified without loopback, if
The port for sending the message is the stacking opening of connecting fault point, and addition loopback mark, will with the addition of the unicast message of loopback mark
Forwarded after loopback according to spare forwarding route table；
The unicast message with loopback mark to purpose member device for other member devices, turns according to spare forwarding route table
Hair；
The method further includes：
If the port for sending the unicast message with loopback mark is the stacking opening of connecting fault point, the message is abandoned.
2. according to the method described in claim 1, it is characterized in that, the method further includes：It is originally to set to purpose member device
Standby unicast message, sends from user port.
3. according to the method described in claim 2, it is characterized in that, the method further includes：It is other to purpose member device
The unicast message identified without loopback of member device, sends according to frame level forwarding table.
4. according to the method described in claims 1 to 3 any one, it is characterised in that：The loopback mark is believed positioned at descriptor
In breath.
5. a kind of unicast message recovery device of the stacked switchboard system of ring topology, is applied in the stacked switchboard system
Member device on, the member device is respectively connected to two in other member devices by two stacking openings, its feature
It is, described device includes：
Spare forwarding route table generation unit, for using a stacking opening as receive message port, using another stacking opening as
The port for sending message generates spare forwarding route table；
Loopback unit, after breaking down in IRF, before frame level forwarding table completes renewal, to what is identified without loopback
Unicast message, if the port for sending the message is the stacking opening of connecting fault point, addition loopback mark, will with the addition of loopback mark
Forwarded after the unicast message loopback of knowledge according to spare forwarding route table；
Loopback retransmission unit, for the unicast message with loopback mark to purpose member device for other member devices, root
Forwarded according to spare forwarding route table；
Described device further includes：
Loopback discarding unit, for sending the stacking opening that the port for carrying the unicast message that loopback identifies is connecting fault point
When, abandon the message.
6. device according to claim 5, it is characterised in that described device further includes：Destination interface retransmission unit, is used for
To the unicast message that purpose member device is this equipment, sent from user port.
7. device according to claim 6, it is characterised in that described device further includes：Retransmission unit is stacked, for mesh
The unicast message that is identified for other member devices without loopback of member device, sent according to frame level forwarding table.
8. according to the device described in claim 5 to 7 any one, it is characterised in that：The loopback mark is believed positioned at descriptor
In breath.
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| CN105827419B (en) * | 2015-01-05 | 2020-03-10 | 华为技术有限公司 | Method, equipment and controller for processing forwarding equipment fault |
| US9699078B1 (en) | 2015-12-29 | 2017-07-04 | International Business Machines Corporation | Multi-planed unified switching topologies |
| CN108933720B (en) * | 2017-05-25 | 2021-11-02 | 中兴通讯股份有限公司 | Information processing method, device and system for ring system and storage medium |
| CN109120521B (en) * | 2017-06-26 | 2022-01-25 | 中兴通讯股份有限公司 | Path switching method of annular stacking system, first stacking equipment and second stacking equipment |
| CN107547430B (en) * | 2017-08-30 | 2022-05-24 | 新华三信息安全技术有限公司 | Message sending method and device |
| CN109302488B (en) * | 2018-10-31 | 2022-02-11 | 新华三信息技术有限公司 | Equipment cascading method, device and host |
| CN109639573B (en) * | 2019-01-28 | 2021-05-25 | 新华三技术有限公司 | Source filtering detection method and device |
| CN113377280A (en) * | 2020-03-09 | 2021-09-10 | 华为技术有限公司 | Storage system, request processing method and switch |
| CN111654560B (en) * | 2020-06-02 | 2022-10-21 | 中电科航空电子有限公司 | Physical address table management interaction method for airborne software and hardware stack switch |
| CN114615148A (en) * | 2022-03-16 | 2022-06-10 | 芯河半导体科技(无锡)有限公司 | Rapid link aggregation failover method |
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