CN103152261A - Method and equipment for generating and distributing link state protocol data unit fragment messages - Google Patents
Method and equipment for generating and distributing link state protocol data unit fragment messages Download PDFInfo
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- CN103152261A CN103152261A CN2013100502253A CN201310050225A CN103152261A CN 103152261 A CN103152261 A CN 103152261A CN 2013100502253 A CN2013100502253 A CN 2013100502253A CN 201310050225 A CN201310050225 A CN 201310050225A CN 103152261 A CN103152261 A CN 103152261A
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Abstract
The invention discloses a method for generating and distributing link state protocol data unit fragment messages, which comprises the following steps of: taking a standby main control board as a current active main control board in the restart process of an active main control board of equipment, generating the LSP (Link State Packet) fragment messages according to recalculated route information as well as a relation between TLV ID (Threshold Limit Value Identification) and LSP fragment numbers before the restart of the existing active main control board and only sending to neighbor equipment if compared with LSP fragment messages before the restart of the existing active main control board, the generated LSP fragment messages are changed. The invention also provides the equipment; and after the restart of the existing active main control board of the equipment is finished, the sending of the unnecessary LSP fragment messages is omitted.
Description
Technical field
The application relates to communication technical field, and particularly a kind of Link State Protocol Data Unit fragment message generates dissemination method and equipment.
Background technology
In order to improve the reliability of network, the mode that we adopt the polylith master control borad to back up.When main control board broke down, slave control board was taken over its work, thereby guaranteed that Intermediate System-to-Intermediate System (Intermediate System-to-Intermediate System, IS-IS) Routing Protocol is unaffected.
The high reliability backup mode that adopts in Intermediate System-Intermediate System generally adopts uninterrupted route (Nonstop Routing, NSR) mode and smooth restarting (Graceful Restart, GR) mode.In dual mode, for the transmission of chain number state information, it is also the transmission of LSD (Link State Database, LSDB), to transmit by send Link State Protocol Data Unit (Link State PDU, LSP) message to neighbours.Every link-state information is put in a LSP with the form of a type lengths values (tlv), and outwards sends.The LSP message number identifies by system banner (ID) number and burst, and wherein system identifier number is the ID of each IS-IS system, is configured and is guaranteed that each system is only by the user; Burst scope 0-255.Because the size of each LSP message is subjected to interface maximum transmission unit (Maximum Transmission Unit, MTU) restriction, when entrained information surpasses interface mtu, can generate a new LSP sheet, the part TLV that will exceed is put in a new LSP, number can distinguish by burst the different bursts that this system produces.When generating LSP, burst number ascending generation of acquiescence use.
Old main control board restart complete after, new main control board, the current main control board that is equipment can regenerate the LSP fragment message, although the information such as topology, route do not change, but owing to recovering route to regenerate order different, may cause each routing iinformation TLV LSP of living in different.Can determine so newly-generated LSP fragment message, the LSP fragment message before restarting with old main control board is different, and sends the LSP fragment message to neighbor device.And the neighbor device that receives this LSP fragment message can think that also this LSP fragment message changes, and can think that the route in original LSP fragment message has not existed, and delete; Again receive other LSP fragment messages and may cause again the routing iinformation deleted again to add again, thereby cause route oscillation, increased the weight of the burden of neighbor device.
Summary of the invention
In view of this, the application provides a kind of Link State Protocol Data Unit fragment message to generate dissemination method and equipment, the old main control board of equipment restart complete after, reduce the transmission of unnecessary LSP fragment message.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that
A kind of LSP fragment message generates dissemination method, is applied to move Intermediate System-Intermediate System, and in the network of configuration high reliability backup mode, comprising:
In the main control board restarting process of the equipment in this network, slave control board is as current main control board, obtain TLV, and the corresponding relation of the TLV ID of each TLV and LSP burst number, and according to the routing iinformation that recomputates, and the TLV that obtains, and the corresponding relation generation LSP fragment message of the TLV ID of each TLV and LSP burst number;
Restart when completing at the old main control board of described equipment, described current main control board is determined arbitrary LSP fragment message of current generation, before restarting with described old main control board, and whether the LSP fragment message of identical LSP burst number is compared and is changed, if, upgrade the refresh time of this LSP fragment message, with the sequence number increase of this LSP fragment message, and send to each neighbor device; Otherwise the refresh time before this LSP fragment message is recovered is as the refresh time of this LSP fragment message.
A kind of equipment is applied to move Intermediate System-Intermediate System, and in the network of configuration high reliability backup mode, this equipment comprises main control board and slave control board, and this equipment comprises: restart unit, acquiring unit, generation unit, determining unit and processing unit;
Describedly restart the unit, be used for restarting the main control board of this equipment;
Described acquiring unit is used for the described process that the main control board of this equipment is restarted in the unit of restarting, and the slave control board of this equipment obtains TLV during as current main control board, and the corresponding relation of the TLV ID of each TLV and LSP burst number;
Described generation unit is used for according to the routing iinformation that recomputates, and the TLV that obtains of described acquiring unit, and the corresponding relation generation LSP fragment message of the TLV ID of each TLV and LSP burst number;
Described determining unit is restarted the unit and is restarted old main control board when completing described, determines arbitrary LSP fragment message of current generation, and before restarting with described old main control board, and whether the LSP fragment message of identical LSP burst number is compared and changed;
Described processing unit when described determining unit determines that described LSP fragment message when changing, upgrades the refresh time of this LSP fragment message before and after old main control board is restarted, increases the sequence number of this LSP fragment message, and sends to each neighbor device; Determine that when described determining unit described LSP fragment message is when unchanged before and after old main control board is restarted, the refresh time before this LSP fragment message is recovered is as the refresh time of this LSP fragment message.
In sum, the application by at the main control board of equipment in restarting process, the routing iinformation that slave control board recomputates as current main control board basis, and old main control board restart before the relation of TLV ID and LSP burst number generate the LSP fragment message, if the LSP fragment message that generates is compared with this LSP fragment message before old main control board is restarted and is changed, just send to neighbor device, the old main control board of equipment restart complete after, reduce the transmission of unnecessary LSP fragment message.
Description of drawings
Fig. 1 is that in the embodiment of the present invention one, the LSP fragment message generates the dissemination method schematic flow sheet;
Fig. 2 is that in the embodiment of the present invention two, the LSP fragment message generates the dissemination method schematic flow sheet;
Fig. 3 is that in the embodiment of the present invention three, the LSP fragment message generates the dissemination method schematic flow sheet;
Fig. 4 is the device structure schematic diagram that is applied to above-mentioned technology in the specific embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, scheme of the present invention is described in further detail.
Propose a kind of LSP fragment message in the embodiment of the present invention and generate dissemination method, be applied to move Intermediate System-Intermediate System, and in the network of configuration high reliability backup mode.The main control board of the equipment in this network is in restarting process, the routing iinformation that slave control board recomputates as current main control board basis, and old main control board restart before the relation of TLV ID and LSP burst number generate the LSP fragment message, if the LSP fragment message that generates is compared with this LSP fragment message before old main control board is restarted and changed, just send to neighbor device.The old main control board of equipment restart complete after, reduce the transmission of unnecessary LSP fragment message.
Embodiment one
Referring to Fig. 1, Fig. 1 is that in the embodiment of the present invention one, the LSP fragment message generates the dissemination method schematic flow sheet.Concrete steps are:
When the main control board fault of equipment, when perhaps needing to upgrade, can restart main control board, in the main control board restarting process, the slave control board of equipment is completed the recovery of link and regenerating of route as the main control board of current device.
In the present embodiment for prevent same TLV before and after old main control board is restarted in different LSP fragment messages, therefore need to obtain the relation that old main control board is restarted front TLV ID and LSP burst number, namely which TLV is in which LSP fragment message.
The current main control board of this equipment sends to the TLV in the LSP fragment message of this equipment to re-start route and calculates according to neighbor device, and the TLV that generated before restarting according to the old main control board of this equipment, and the relation of TLV ID and LSP burst number regenerates the LSP fragment message.
When obtaining the concerning of TLV ID and LSP burst number, some TLV does not need to obtain, such as, for the regional address TLV that describes the area attribute that the IS-IS system supports, describe protocol type and support the agreement of attribute to support TLV, describe the how topological TLV of many topological attributes, it number is in 0 LSP fragment message that these TLV can only be placed on the LSP burst; Open System Interconnection (the Open System Interconnection of authentication information is described, OSI) authentication TLV and IP authentication TLV, therefore these TLV need to be filled in all LSP fragment messages, can not obtain the corresponding relation of TLV ID and LSP burst number.
When described slave control board at equipment generates arbitrary LSP fragment message as current main control board, by the first preset rules, that the TLV of same type is arranged sequentially, by the second preset rules, that many TLV of same type are arranged sequentially.The first preset rules wherein and the second preset rules user can configure voluntarily according to practical application, as long as fixing in whole service ISIS network, guarantee that in each LSP fragment message, putting in order of TLV unanimously gets final product.
The LSP fragment message that generates like this is if the LSP fragment message that the routing iinformation that recomputates does not affect, the LSP fragment message that regenerates is not compared not variation with the LSP fragment message that old main control board is restarted front generation, has guaranteed the constant of TLV position.
In this step, current main control board is determined arbitrary LSP fragment message of current generation, before restarting with described old main control board, and whether the LSP fragment message of identical LSP burst number is compared and is changed, can by current main control board determine current generation arbitrary LSP fragment message verification and value, before restarting with described old main control board, and the verification of the LSP fragment message of identical LSP burst number with value whether identically compare.
When generating the LSP fragment message, all can generate a verification and, as long as older main control board restart before and after same LSP fragment message verification and can determine whether the LSP fragment message changes.
When this LSP fragment message changes, need to send this LSP fragment message to neighbor device, and increase the sequence number of this LSP fragment message, with the notice neighbor device.
When each neighbor device receives this LSP fragment message, process according to the content of this LSP fragment message.
Refresh time before step 105, the current main control board of this equipment are recovered this LSP fragment message is as the refresh time of this LSP fragment message.
When this LSP fragment message is unchanged, do not need to send this LSP fragment message to neighbor device, before only needing old main control board is restarted, the refresh time of this LSP fragment message gets final product as the refresh time of current this LSP fragment message.
Not only TLV is added in the LSP fragment message of the identical LSP burst of main control board before restarting number, TLV type in same LSP fragment message is identical, and type is not identical by predefined rule ordering arrangement, determines the invariant position of the unchanged TLV of information.So the unchanged LSP fragment message of link-state information is not needed to send to neighbor device, reduced the transmission of LSP fragment message.
And neighbor device also can greatly reduce the reception of LSP fragment message, can be because link-state information change, and be only that the TLV position changes and adds route after cancelling route, cause the link concussion, thereby increased the weight of neighbours' burden.
Embodiment two
When the high reliability backup mode that configures in the network of operation Intermediate System to Intermediate System is the NSR mode, the main control board of equipment can backup to slave control board with all link-state informations, in old main control board restarting process, current main control board is completed the recovery of link and regenerating of route according to the link-state information of backup again.
Before the main control board of equipment was restarted, the slave control board of equipment received the TLV of described main control board backup, and the corresponding relation of the TLV ID of each TLV and LSP burst number, and the refresh time of LSP fragment message and verification and, and store.
Referring to Fig. 2, Fig. 2 is the generation dissemination method schematic flow sheet of LSP fragment message in the embodiment of the present invention two.Concrete steps are:
Embodiment three
If the high reliability backup mode that configures in the network of operation Intermediate System to Intermediate System is the GR mode, link-state information before the current main control board of this equipment obtains by neighbor device, then complete the recovery of link and regenerating of route according to the link-state information that gets.
Referring to Fig. 3, Fig. 3 is the generation dissemination method schematic flow sheet of LSP fragment message in the embodiment of the present invention three.Concrete steps are:
When carrying refresh time in the LSP fragment message, this refresh time can be carried in ageing time in the LSP fragment message (HoldTime) field, and can not affect verification and calculating.
Based on same inventive concept, also propose a kind of equipment in the specific embodiment of the invention, be applied to move Intermediate System-Intermediate System, and in the network of configuration high reliability backup mode, this equipment comprises main control board and slave control board.Referring to Fig. 4, Fig. 4 is the device structure schematic diagram that is applied to above-mentioned technology in the specific embodiment of the invention.This equipment comprises: restart unit 401, acquiring unit 402, generation unit 403, determining unit 404 and processing unit 405.
Acquiring unit 402 is used for restarting the process that the main control board of this equipment is restarted in unit 401, and the slave control board of this equipment obtains TLV during as current main control board, and the corresponding relation of the TLV ID of each TLV and LSP burst number.
Determining unit 404 is restarted old main control board when completing restarting unit 401, determines arbitrary LSP fragment message of current generation, and before restarting with described old main control board, and whether the LSP fragment message of identical LSP burst number is compared and changed.
Preferably,
Preferably,
Acquiring unit 402, for the regional address TLV that describes the area attribute that the IS-IS system supports, describe protocol type and support the agreement of attribute to support TLV, describe the how topological TLV of many topological attributes, and the OSI authentication TLV and the IP authentication TLV that describe authentication information, do not obtain the relation of the TLV ID of corresponding TLV and LSP burst number.
Preferably,
Determining unit 404, be used for to determine current generation arbitrary LSP fragment message verification and value, before restarting with described old main control board, and the verification of the LSP fragment message of identical LSP burst number with value whether identically compare.
Preferably, this equipment further comprises: memory cell 406.
Acquiring unit 402 is used for from the TLV of memory cell 406 backups, and the corresponding relation of the TLV ID of each TLV and LSP burst number.
Preferably,
Preferably, this equipment further comprises: receiving element 407.
Receiving element 407 is used for receiving the LSP fragment message that each neighbor device sends when described high reliability backup mode is the GR mode.
Acquiring unit 402 be used for to be resolved the LSP fragment message that receiving element 407 receives and is obtained TLV, and the corresponding relation of the TLV ID of each TLV and LSP burst number.
Preferably,
The unit of above-described embodiment can be integrated in one, and also can separate deployment; A unit can be merged into, also a plurality of subelements can be further split into.
In sum, in the specific embodiment of the invention by at the main control board of equipment in restarting process, the routing iinformation that slave control board recomputates as current main control board basis, and old main control board restart before the relation of TLV ID and LSP burst number generate the LSP fragment message, if the LSP fragment message that generates is compared with this LSP fragment message before old main control board is restarted and is changed, just send to neighbor device, the old main control board of equipment restart complete after, reduce the transmission of unnecessary LSP fragment message.
Give in specific embodiment in the LSP fragment message of the identical LSP burst number before not only adding TLV to main control board and restarting, TLV type in same LSP fragment message is identical, and type is not identical by predefined rule ordering arrangement, determines the invariant position of the unchanged TLV of information.So the unchanged LSP fragment message of link-state information is not needed to send to neighbor device, reduced the transmission of LSP fragment message.
And neighbor device also can greatly reduce the reception of LSP fragment message, can be because link-state information change, and be only that the TLV position changes and adds route after cancelling route, cause the link concussion, thereby increased the weight of neighbours' burden.
The above is only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (16)
1. a Link State Protocol Data Unit LSP fragment message generates dissemination method, is applied to move the Intermediate System-to-Intermediate System Intermediate System-Intermediate System, and in the network of configuration high reliability backup mode, it is characterized in that, comprising:
In the main control board restarting process of the equipment in this network, the slave control board of this equipment is as current main control board, obtain type lengths values TLV, and the corresponding relation of the TLV of each TLV sign ID and LSP burst number, and according to the routing iinformation that recomputates, and the TLV that obtains, and the corresponding relation generation LSP fragment message of the TLV ID of each TLV and LSP burst number;
Restart when completing at the old main control board of described equipment, the current main control board of described equipment is determined arbitrary LSP fragment message of current generation, before restarting with described old main control board, and whether the LSP fragment message of identical LSP burst number is compared and is changed, if, upgrade the refresh time of this LSP fragment message, with the sequence number increase of this LSP fragment message, and send to each neighbor device; Otherwise the refresh time before this LSP fragment message is recovered is as the refresh time of this LSP fragment message.
2. method according to claim 1, it is characterized in that, described method further comprises: when described slave control board generates arbitrary LSP fragment message as current main control board, by the first preset rules, that the TLV of same type is arranged sequentially, by the second preset rules, that many TLV of same type are arranged sequentially.
3. method according to claim 1, is characterized in that, described method further comprises:
For the regional address TLV that describes the area attribute that the IS-IS system supports, describe protocol type and support the agreement of attribute to support TLV, describe the how topological TLV of many topological attributes, and the Open System Interconnection OSI authentication TLV and the Internet Protocol IP authentication TLV that describe authentication information, do not obtain the corresponding relation of the TLV ID of corresponding TLV and LSP burst number.
4. method according to claim 1, is characterized in that,
Described current main control board is determined arbitrary LSP fragment message of current generation, before restarting with described old main control board, and whether the LSP fragment message of identical LSP burst number is compared and is changed, comprise: described current main control board determine current generation arbitrary LSP fragment message verification and value, before restarting with described old main control board, and the verification of the LSP fragment message of identical LSP burst number with value whether identically compare.
5. according to claim 1-4 described methods of any one, is characterized in that, when described high reliability backup mode was uninterrupted route NSR mode, before the main control board of this equipment was restarted, described method further comprised:
Described slave control board receives the TLV of described main control board backup, and the corresponding relation of the TLV ID of each TLV and LSP burst number and storing;
Described slave control board is as current main control board, obtain TLV, and the corresponding relation of the TLV ID of each TLV and LSP burst number, comprising: slave control board is as current main control board, obtain the TLV of local backup, and the corresponding relation of the TLV ID of each TLV and LSP burst number.
6. method according to claim 5, is characterized in that, before the main control board of this equipment was restarted, described method further comprised: described slave control board receives the refresh time of the LSP fragment message of master control borad backup;
The described method of obtaining this LSP fragment message recovery refresh time before is: the refresh time that obtains this LSP fragment message of local backup.
7. according to claim 1-4 described methods of any one, is characterized in that, when described high reliability backup mode is smooth restarting GR mode, described slave control board is as current main control board, obtain TLV, and the corresponding relation of the TLV ID of each TLV and LSP burst number, comprising:
Receive the LSP fragment message that each neighbor device sends, resolve the LSP fragment message that receives and obtain TLV, and the corresponding relation of the TLV ID of each TLV and LSP burst number.
8. method according to claim 7, is characterized in that,
The described method of obtaining this LSP fragment message recovery refresh time before is: when receiving each neighbor device transmission LSP fragment message, obtain the refresh time of this LSP fragment message that carries in the LSP fragment message of reception.
9. equipment, be applied to move the Intermediate System-to-Intermediate System Intermediate System-Intermediate System, and in the network of configuration high reliability backup mode, this equipment comprises main control board and slave control board, it is characterized in that, this equipment comprises: restart unit, acquiring unit, generation unit, determining unit and processing unit;
Describedly restart the unit, be used for restarting the main control board of this equipment;
Described acquiring unit, be used for the described process that the main control board of this equipment is restarted in the unit of restarting, the slave control board of this equipment is during as current main control board, obtain type lengths values TLV, and the corresponding relation of the TLV of each TLV sign ID and Link State Protocol Data Unit LSP burst number;
Described generation unit is used for according to the routing iinformation that recomputates, and the TLV that obtains of described acquiring unit, and the corresponding relation generation LSP fragment message of the TLV ID of each TLV and LSP burst number;
Described determining unit is restarted the unit and is restarted old main control board when completing described, determines arbitrary LSP fragment message of current generation, and before restarting with described old main control board, and whether the LSP fragment message of identical LSP burst number is compared and changed;
Described processing unit when described determining unit determines that described LSP fragment message when changing, upgrades the refresh time of this LSP fragment message before and after old main control board is restarted, increases the sequence number of this LSP fragment message, and sends to each neighbor device; Determine that when described determining unit described LSP fragment message is when unchanged before and after old main control board is restarted, the refresh time before this LSP fragment message is recovered is as the refresh time of this LSP fragment message.
10. equipment according to claim 9, is characterized in that,
Described generation unit, by the first preset rules, that the TLV of same type is arranged sequentially when becoming arbitrary LSP fragment message, by the second preset rules, that many TLV of same type are arranged sequentially.
11. equipment according to claim 9 is characterized in that,
Described acquiring unit, for the regional address TLV that describes the area attribute that the IS-IS system supports, describe protocol type and support the agreement of attribute to support TLV, describe the how topological TLV of many topological attributes, and the Open System Interconnection OSI authentication TLV and the IP authentication TLV that describe authentication information, do not obtain the relation of the TLV ID of corresponding TLV and LSP burst number.
12. equipment according to claim 9 is characterized in that,
Described determining unit, be used for to determine current generation arbitrary LSP fragment message verification and value, before restarting with described old main control board, and the verification of the LSP fragment message of identical LSP burst number with value whether identically compare.
13. according to claim 9-12 described equipment of any one is characterized in that described equipment further comprises: memory cell;
Described memory cell, be used for when described high reliability backup mode is uninterrupted route NSR mode, describedly restart before the unit restarts the main control board of this equipment, receive the TLV of described main control board backup, and the corresponding relation of the TLV ID of each TLV and LSP burst number and storing;
Described acquiring unit is used for the TLV from described Storage unit backups, and the corresponding relation of the TLV ID of each TLV and LSP burst number.
14. equipment according to claim 13 is characterized in that,
Described memory cell is further used for receiving the refresh time of the LSP fragment message of master control borad backup;
Described processing unit is further used for obtaining the refresh time of this LSP fragment message of described Storage unit backups.
15. according to claim 9-12 described equipment of any one is characterized in that described equipment further comprises: receiving element;
Described receiving element is used for receiving the LSP fragment message that each neighbor device sends when described high reliability backup mode is smooth restarting GR mode;
Described acquiring unit is used for resolving the LSP fragment message that described receiving element receives and obtains TLV, and the corresponding relation of the TLV ID of each TLV and LSP burst number.
16. equipment according to claim 15 is characterized in that,
Described processing unit is further used for obtaining this LSP fragment message refresh time that carries in the LSP fragment message of described receiving element reception.
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