CN103200122B - A kind of software defined network is organized the processing method of table, system and controller - Google Patents
A kind of software defined network is organized the processing method of table, system and controller Download PDFInfo
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- 238000003672 processing method Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 44
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 35
- 230000009471 action Effects 0.000 claims description 41
- 230000008569 process Effects 0.000 claims description 27
- 230000008859 change Effects 0.000 claims description 19
- 230000001965 increasing effect Effects 0.000 claims description 10
- 230000002776 aggregation Effects 0.000 description 7
- 238000004220 aggregation Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 2
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Abstract
The invention discloses the processing method of group table in a kind of software defined network, including: when in group table go out port be link polymerization terminal port time, the nested mode of employing group table realizes the forwarding of data stream.The present invention further simultaneously discloses the processing system of group table and a kind of controller in a kind of software defined network, and the method for the invention, system and controller can support the scene that the downstream port port or multicast tree is link polymerization terminal port of equal cost multipath (ECMP).
Description
Technical field
The present invention relates to the group list processing technique in the communications field, particularly relate to a kind of software defined network
The group processing method of table, system and controller in (Software Defined Network, SDN).
Background technology
SDN is a kind of new network innovation framework, is a change for conventional network equipment and framework,
Its core concept is that forwarded controls to separate with network, thus can realize the flexible control of network traffics,
Innovation for core network and application provides good platform.
Key-course in SDN is extracted by the control function in the network equipments such as original switch, router
Come, use independent control software to realize.Software function in original switch, router is all from base
Infrastructure layer is peeled off, by the management of key-course unified implementation exchange with route.Wherein, described control software can
Remotely to issue increasings to forwarding unit, to change, delete etc. the stream table (flow table) of instruction modification self, with realization
Process to network message, such as: forwarding, tag processes, filtration etc..
In SDN, multiple switches (switch) are controlled and manage by controller (controller),
The framework of its composition is as shown in Figure 1.At equal cost multipath (Equal-CostMultipathRouting, ECMP)
Or it is required under the scene of multicast use and processes to group table (group table), but prior art can only
Single group of list item is operated, it may be assumed that a list item in stream table can only call a list item in group table,
But this implementation can not meet following scene: in the scenes such as link failure protection or multilink bundling,
The downstream port going out port or multicast tree of ECMP is likely for link polymerization terminal port.
Summary of the invention
In view of this, the processing method of group table, system in a kind of SDN of offer is provided
And controller, the field that the downstream port port or multicast tree is link polymerization terminal port of ECMP can be supported
Scape.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
The invention provides the processing method of group table in a kind of software defined network, the method includes:
The mode of controller employing group table nesting realizes the forwarding of data stream.
Further, described controller equal cost multipath ECMP go out port be link polymerization terminal port or
When the downstream port of multicast tree is link polymerization terminal port, the mode of employing group table nesting realizes the forwarding of data stream.
Wherein, the implementation of described group of table nesting is:
Arrange group list item 1 in multiple action bucket action bucket represent ECMP multiple go out port or
Multiple downstream ports of multicast tree, and would indicate that the action in the action bucket of link polymerization terminal port sets
It is set to jump to organize list item 2；Multiple action bucket in group list item 2 then represent link polymerization terminal port
Multiple physics go out port.
Further, the method also includes:
When the downstream port information that ECMP goes out port or multicast tree changes, by the change arranged
Action bucket in group table is increased, is deleted or modified by message.
Wherein, described change message is: group_bucket_mod message.
Further, the method also includes:
After switch is connected to controller, switch reports self whether support group table nesting ability, if
Support, then continue executing with follow-up group table Embedded process flow process；It is otherwise, follow-up when need to perform group table nesting,
Report an error.
Wherein, described switch reports self whether support group table nesting ability, for:
Controller sends the ability of query messages Feature Request inquiry switch, switch to switch
Reply Query Result by Feature Reply message to controller, Feature Reply message carries exchange
The information of machine self whether support group table nesting ability.
Present invention also offers the processing system of group table in a kind of software defined network, including controller；Described
Controller includes: group table handing module, and the mode for using group table nested realizes the forwarding of data stream.
Wherein, described group of table handing module, specifically for when ECMP go out port be link polymerization terminal port,
Or when the downstream port of multicast tree is link polymerization terminal port, the mode of employing group table nesting realizes data stream
Forward.
Further, when the downstream port information that ECMP goes out port or multicast tree changes, described
Group table handing module, be additionally operable to by arrange change message the action bucket in group table is increased,
It is deleted or modified.
This system also includes that switch, described switch include: capability reporting module, for switch and control
After device processed connects, report switch whether support group table nesting ability；
Accordingly, described group of table handing module, when being further used for determining switch support group table nesting ability,
Continue executing with follow-up group table Embedded process flow process；Determine when switch does not support group table nesting ability, rear
Continuous when need to perform group table nesting, report an error.
Present invention also offers a kind of controller, described controller includes: group table handing module, described group of table
Processing module is group table handing module mentioned above.
Organizing the processing method of table, system and controller in the SDN that the present invention provides, controller employing group table is embedding
The mode of set realizes the forwarding of data stream, it may be assumed that arrange the multiple action bucket action bucket in group list item 1
Represent equal cost multipath ECMP multiple go out port or multiple downstream ports of multicast tree, and would indicate that chain
Action in the action bucket of road aggregation port is set to jump to organize list item 2；Organize in list item 2 many
Individual action bucket then represents that multiple physics of link polymerization terminal port go out port.Therefore, the present invention can support
The scene that the downstream port going out port or multicast tree is link polymerization terminal port of ECMP.
Additionally, the action bucket in group table is increased by the present invention also by the change message arranged,
It is deleted or modified, therefore, the downstream port quantity that ECMP goes out port or multicast tree can be supported to change,
Or port is performed the scene of change process.
Additionally, the present invention is after switch is connected to controller, switch reports self whether support group table
Nested ability, if supported, then continues executing with follow-up group table Embedded process flow process；Otherwise, follow-up need are held
During row group table nesting, report an error, it is ensured that effectively carrying out of group table nesting method, system is more perfect.
Accompanying drawing explanation
Fig. 1 is the structure composed schematic diagram of SDN middle controller and switch；
Fig. 2 is the schematic flow sheet of the processing method embodiment of group table in SDN of the present invention；
Fig. 3 is that switch of the present invention is illustrated to the method for controller report self whether support group table nesting ability
Figure；
Fig. 4 is the system structure schematic diagram that the embodiment of the present invention one ECMP goes out that port is link polymerization terminal port；
Fig. 5 be the embodiment of the present invention two multicast tree downstream port be link polymerization terminal port system structure signal
Figure.
Detailed description of the invention
The basic thought of the present invention is: the mode of controller employing group table nesting realizes the forwarding of data stream.
Wherein, described controller is link polymerization terminal port or multicast at the port that goes out of equal cost multipath ECMP
When the downstream port of tree is link polymerization terminal port, the mode of employing group table nesting realizes the forwarding of data stream.
Further, the method also includes: when described ECMP goes out the downstream message of port or multicast tree
When breath changes, when the most described port number changes or port is performed change process, by setting
Action bucket (action bucket) in group table is increased, is deleted or modified by the change message put；
Wherein, described change message is group_bucket_mod message.
Further, the method also includes: after being connected to controller, and switch reports whether self props up
Holding group table nesting ability, if supported, then continuing executing with follow-up group table Embedded process flow process；Otherwise, after
Continuous when need to perform group table nesting, report an error.
Below with ECMP go out port as link polymerization terminal port or multicast tree downstream port for link gather
As a example by closing port, and in conjunction with the drawings and the specific embodiments the present invention is described in further detail.
Fig. 2 is the schematic flow sheet of the processing method embodiment of group table in SDN of the present invention, as in figure 2 it is shown,
Including:
Step 201: after being connected to controller, switch reports self whether support group table nesting ability,
If supported, then perform step 202；Otherwise, follow-up when need to perform group table nesting, report an error.
Particularly as follows: after switch is connected to controller, as it is shown on figure 3, controller is to switch
Sending the ability of query messages Feature Request inquiry switch, switch is disappeared by Feature Reply
Cease and reply Query Result to controller, Feature Reply message is carried switch self whether support group
The information of table nesting ability, if supported, then performs step 202；Otherwise, follow-up needs execution group table is embedding
During set operation, controller reports an error.
Step 202: when the downstream port going out port or multicast tree of ECMP is link polymerization terminal port,
The mode of employing group table nesting realizes the forwarding of data stream；
Particularly as follows: when the downstream port going out port or multicast tree of ECMP is link polymerization terminal port, if
Multiple action bucket in group list item 1 represent ECMP multiple go out port or multicast tree multiple under
Trip port, and the action in the action bucket wherein representing link polymerization terminal port is set to apply
Group2, i.e. jumps to organize list item 2.Multiple action bucket in group list item 2 then represent link aggregation end
Multiple physics of mouth go out port.
Further, the method also includes:
Step 203: when the downstream port information that ECMP goes out port or multicast tree changes, pass through
Action bucket in group table is increased, is deleted or modified by the change message arranged；
Particularly as follows: when the downstream port quantity that ECMP goes out port or multicast tree changes or right
When port performs change process, by setting change message group_bucket_mod to the action in group table
Bucket carries out increasing, being deleted or modified.
Below in conjunction with specific embodiment, the method for the present invention is described in detail.
Embodiment one
The scene that the present embodiment is corresponding is: it is link polymerization terminal port that ECMP goes out port, system structure such as Fig. 4
Shown in.Fig. 4 interior joint A-node I all represents switch (switch).Each switch power on after with controller
Set up and connect, after connection establishment completes, it is assumed that personal computer (PC) 1 to communicate with PC3, and
ECMP is there is between node E and node H, including: path 1 and path 2；Wherein, path 1 is
E---F---H, path 2 is E---G---H, uses link polymerization terminal port between its interior joint E and node F,
Then controller is transferred to node E, and the stream table and the group table content that i.e. issue from node E are as follows:
Here, first pass through purpose IP of common stream table coupling PC3, process then into group list item 1, it may be assumed that
apply group1.In group list item 1, lookup (Selected) type indicator data flow is used to dissipate
Row (hash) process, two action bucket represent respectively between node E from node H different go out end
Mouthful.Action bucket1 represents the port that goes out between node E and node G, and action bucket2 represents
Link polymerization terminal port between node E and node F, processes so needing to jump to organize list item 2, group
Two action bucket in list item 2 represent link polymerization terminal port between node E and node F respectively
Member port.
Embodiment two
The scene that the present embodiment is corresponding is: multicast tree downstream port is link polymerization terminal port, system structure such as figure
Shown in 5.As it is shown in figure 5, in multicast application scene, 1 multicast source (Source) and 3 multicasts connect
Receipts person (Receiver1, Receiver2 and Receiver3) communicates, shown node A-node I table
Show switch.Wherein, between node G and node H, there is link polymerization terminal port, then controller transmission
To node G, the stream table and the group table content that i.e. issue from node G are as follows:
Here, the IP address of common stream table coupling multicast group is first passed through, it may be assumed that dip=multicast_ip, then
Enter into group list item 1 to process.In group list item 1, use ALL type indicator data flow warp respectively
Cross all of action bucket process.Wherein, described bucket1 is to represent to mail to receiver2
Port, bucket2 then jumps to organize list item 2.Group list item 2 represents the link between node G and node H
Aggregation port, two action bucket in group list item 2 represent chain between node G and node H respectively
The member port of road aggregation port.
Embodiment three
The scene that the present embodiment is corresponding is: ECMP goes out port, multicast tree downstream port, link aggregation member
Port changes.When the port that goes out of ECMP, multicast tree downstream port, link aggregation member port increases
Or when deleting, or when described port is performed change process, need the action bucket in group list item is entered
Row operation, here can setting change message group_bucket_mod process, particular content is as follows:
Wherein, described command field represents increase (add), deletes (delete) or amendment operation,
Bucket id represents the particular content that the Id, buckets [0] of the bucket that needs operate then represent bucket.
Present invention also offers the processing system of group table in a kind of software defined network, this system includes: control
Device, described controller includes: group table handing module, realizes data stream for the mode using group table nested
Forward.
Group table handing module in described controller, is link aggregation end specifically for the port that goes out as ECMP
When the downstream port of mouth or multicast tree is link polymerization terminal port, the mode of employing group table nesting realizes data
The forwarding of stream.
Further, when the downstream port information that ECMP goes out port or multicast tree changes, described
Group table handing module in controller, is additionally operable to by the change message arranged the action bucket in group table
Carry out increasing, being deleted or modified.
Further, this system also includes that switch, described switch include: capability reporting module, is used for
After switch is connected with controller, report switch whether support group table nesting ability；
Accordingly, the group table handing module in described controller, it is further used for determining switch support group table
During nested ability, continue executing with follow-up group table Embedded process flow process；Determine that switch does not support that group table is nested
During ability, follow-up need to perform group table nesting time, report an error.
Present invention also offers a kind of controller, including group table handing module, described group of table handing module is upper
Group table handing module in controller described in literary composition.
The above, only presently preferred embodiments of the present invention, it is not intended to limit the protection model of the present invention
Enclose.
Claims (8)
1. a software defined network is organized the processing method of table, it is characterised in that the method
Including:
The mode of controller employing group table nesting realizes the forwarding of data stream；
Described controller equal cost multipath ECMP go out port be link polymerization terminal port or
When the downstream port of multicast tree is link polymerization terminal port, the mode of employing group table nesting realizes data
The forwarding of stream；
The implementation of described group of table nesting is:
Arrange group list item 1 in multiple action bucket action bucket represent ECMP multiple go out
Port or multiple downstream ports of multicast tree, and would indicate that the action of link polymerization terminal port
Action in bucket is set to jump to organize list item 2；Multiple action in group list item 2
Bucket then represents that multiple physics of link polymerization terminal port go out port.
Method the most according to claim 1, it is characterised in that the method also includes:
When the downstream port information that ECMP goes out port or multicast tree changes, pass through
Action bucket in group table is increased, is deleted or modified by the change message arranged.
Method the most according to claim 1 and 2, it is characterised in that the method is also wrapped
Include:
After switch is connected to controller, switch reports self whether support group table nesting energy
Power, if supported, then continues executing with follow-up group table Embedded process flow process；Otherwise, follow-up need
During execution group table nesting, report an error.
Method the most according to claim 3, it is characterised in that described switch reports
Self whether support group table nesting ability, for:
Controller sends the energy of query messages Feature Request inquiry switch to switch
Power, switch replys Query Result, Feature by Feature Reply message to controller
Reply message is carried the information of switch self whether support group table nesting ability.
5. software defined network is organized a processing system for table, including controller；Its feature
Being, described controller includes: group table handing module, real for the mode using group table nested
The forwarding of existing data stream；
Described group of table handing module, specifically for the port that goes out as equal cost multipath ECMP be
When the downstream port of link polymerization terminal port or multicast tree is link polymerization terminal port, employing group table
Nested mode realizes the forwarding of data stream；
The implementation of described group of table nesting is:
Arrange group list item 1 in multiple action bucket action bucket represent ECMP multiple go out
Port or multiple downstream ports of multicast tree, and would indicate that the action of link polymerization terminal port
Action in bucket is set to jump to organize list item 2；Multiple action in group list item 2
Bucket then represents that multiple physics of link polymerization terminal port go out port.
System the most according to claim 5, it is characterised in that when ECMP goes out port
Or when the downstream port information of multicast tree changes, described group of table handing module, it is additionally operable to
By the change message arranged, the action bucket in group table is increased, is deleted or modified.
7. according to the system described in claim 5 or 6, it is characterised in that this system is also wrapped
Including switch, described switch includes: capability reporting module, for switch with controller even
After connecing, report switch whether support group table nesting ability；
Accordingly, described group of table handing module, it is further used for determining that switch support group table is embedding
During set ability, continue executing with follow-up group table Embedded process flow process；Determine that switch does not support group
During table nesting ability, follow-up need to perform group table nesting time, report an error.
8. a controller, it is characterised in that described controller includes: group table handing module,
Described group of table handing module is the group table handing module according to any one of claim 5 to 7.
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