CN102281199A - Route equipment, route reflector and route information processing method and system - Google Patents
Route equipment, route reflector and route information processing method and system Download PDFInfo
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- CN102281199A CN102281199A CN2011102351136A CN201110235113A CN102281199A CN 102281199 A CN102281199 A CN 102281199A CN 2011102351136 A CN2011102351136 A CN 2011102351136A CN 201110235113 A CN201110235113 A CN 201110235113A CN 102281199 A CN102281199 A CN 102281199A
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Abstract
The embodiment of the invention provides route equipment, a route reflector, a route information processing method and a route information processing system. The route information processing method comprises the following steps that: first route equipment receives the route information of second route equipment and disconnection no deletion identification information corresponding to the route information from the route reflector; the first route equipment determines that border gateway protocol (BGP) connection between the first route equipment and the route reflector is passively disconnected; and the first route equipment processes the route information corresponding to the disconnection no deletion identification information in a graceful restart (GR) mode. In the embodiment of the invention, the route information of other route equipment, which is positioned on a forwarding path, is processed in the GR mode, so that the forwarding path among the equipment is kept unchanged temporarily, the smoothness of service flow is ensured, and flow loss is avoided.
Description
Technical field
The embodiment of the invention relates to the communication technology, relates in particular to a kind of routing device, Router Reflector, routing iinformation processing method and system.
Background technology
Along with the routing device of access network is more and more, the full mesh connection of network becomes and becomes increasingly complex, Router Reflector (Route Reflector, be called for short RR) (Internal Border Gateway Protocol, be called for short: full mesh IBGP) connects to can be used for simplifying Internal BGP.
Fig. 1 is (the Virtual Private Network of virtual private networks in the prior art, abbreviation VPN) network diagram of single reflector, as shown in Figure 1, comprise RR, Provider Edge (Provider Edge in the VPN network, be called for short: PE) equipment PE1, PE2 and customer edge (Customer Edge, be called for short: CE) equipment CE1, CE2, CE are connected to the client device of PE for the user, simultaneously, PE1 and PE2 are also as the client computer routing device of RR.When professional transmission was arranged between the ce1 and ce2, (Label switched path was called for short: LSP) transmit in the tunnel label switched path that can set up between PE1 and PE2.When RR breaks down or RR can cause that RR is connected passive disconnection with BGP between the PE1 when link between the PE1 breaks down, be connected passive disconnection in case RR occurs with BGP between the PE1, PE1 just will all delete from the routing iinformation that RR receives, comprise the routing iinformation of having deleted the client computer routing device PE2 that is on the service transmission path, thereby the service traffics between PE1 and the PE2 are interrupted.
Above-mentioned BGP connects passive disconnection and causes that the routing device deletion is in the routing iinformation of the routing device on the transmission path, the service traffics that cause transmitting are interrupted, thereby not only cause traffic loss, but also reduced the stability of professional transmission in the network system.
Summary of the invention
The embodiment of the invention provides a kind of routing device, Router Reflector, routing iinformation processing method and system, is connected passive disconnection with BGP between the routing device and causes that service traffics lose and reduces the problem of the professional stability of transmitting in the network system in order to solve Router Reflector.
For achieving the above object, an aspect of of the present present invention provides a kind of routing iinformation processing method, comprising:
First routing device is not deleted identification information from the routing iinformation of Router Reflector reception secondary route equipment and the disconnection corresponding with described routing iinformation, and wherein, the service traffics of carrying out route according to described routing iinformation are without described Router Reflector;
Described first routing device determines that described first routing device is connected passive disconnection with Border Gateway Protocol (BGP) between the described Router Reflector;
Described first routing device pair is not deleted the corresponding routing iinformation of identification information with described disconnection and is adopted Graceful Restart GR mode to handle.
An aspect of of the present present invention provides a kind of routing iinformation processing method, comprising:
Router Reflector receives the routing iinformation of secondary route equipment, and wherein, the service traffics of carrying out route according to described routing iinformation are without described Router Reflector;
Described Router Reflector is that identification information is not deleted in the corresponding disconnection of described routing iinformation configuration;
Described Router Reflector is not deleted identification information with described routing iinformation and described disconnection and is sent to first routing device, so that described first routing device at described first routing device when Border Gateway Protocol (BGP) between the described Router Reflector is connected passive disconnection, adopt Graceful Restart GR mode to handle to not deleting the corresponding routing iinformation of identification information with described disconnection.
An aspect of of the present present invention provides a kind of first routing device, comprising:
Receiving element is used for not deleting identification information from the routing iinformation of Router Reflector reception secondary route equipment and the disconnection corresponding with described routing iinformation, and wherein, the service traffics of carrying out route according to described routing iinformation are without described Router Reflector;
Determining unit is used for determining that described first routing device is connected passive disconnection with Border Gateway Protocol (BGP) between the described Router Reflector;
Processing unit is used for when described BGP connects passive disconnection, does not adopt Graceful Restart GR mode to handle to not deleting the corresponding routing iinformation of identification information with described disconnection.
An aspect of of the present present invention provides a kind of Router Reflector, comprising:
Receiving element is used to receive the routing iinformation of secondary route equipment, and wherein, the service traffics of carrying out route according to described routing iinformation are without described Router Reflector;
Dispensing unit is used to the corresponding disconnection of described routing iinformation configuration not delete identification information;
Transmitting element, be used for that identification information is not deleted in described routing iinformation and described disconnection and send to first routing device, so that described first routing device at described first routing device when Border Gateway Protocol (BGP) between the described Router Reflector is connected passive disconnection, adopt Graceful Restart GR mode to handle to not deleting the corresponding routing iinformation of identification information with described disconnection.
An aspect of of the present present invention provides a kind of routing iinformation treatment system, comprising: above-mentioned Router Reflector and at least two routing devices that are connected with described Router Reflector, wherein at least one described routing device is the first above-mentioned routing device.
As shown from the above technical solution, in the embodiment of the invention, first routing device is when determining it and BGP between the Router Reflector is connected passive disconnection, the routing iinformation with the corresponding secondary route equipment of identification information is not deleted in disconnection that this Router Reflector is sent adopts Graceful Restart GR mode to handle, and does not promptly temporarily delete this routing iinformation to keep transmission path.On the one hand, by Router Reflector is that identification information is not deleted in the routing iinformation configuration disconnection of carrying out the GR processing, first routing device need not to have amplified the opposite end and entered the condition that Graceful Restart is assisted equipment (GR helper) by judging that with opposite end mutual the opposite end whether can GR; On the other hand, temporarily do not delete routing iinformation by adopting the GR mode, after making that BGP connects passive disconnection, if this BGP is connected in a period of time and can rebulids, then the current service traffics transmission path that carries out of first routing device is constant, assurance flow normal transmission is not interrupted, avoided in the prior art being in the problem that the service traffics of the transmission that the routing iinformation of routing device on the forward-path causes are lost because of deletion, thereby not only improved the service traffics transmission quality, and helped the stability of Network Transmission.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the network diagram of virtual private networks list reflector;
Fig. 2 is the flow chart of the routing iinformation processing method of one embodiment of the invention;
Fig. 3 is the detail flowchart that first routing device adopts GR to handle among Fig. 2;
Fig. 4 is the flow chart of the routing iinformation processing method of one embodiment of the invention;
Fig. 5 is the flow chart of the routing iinformation processing method of one embodiment of the invention;
Fig. 6 is the structural representation of the routing device of one embodiment of the invention;
Fig. 7 is the structural representation of the routing device of one embodiment of the invention;
Fig. 8 is the structural representation of the Router Reflector of one embodiment of the invention;
Fig. 9 is the structural representation of the routing processing system of one embodiment of the invention;
Figure 10 is the flow chart that routing device is handled routing iinformation in the one embodiment of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Fig. 2 is the flow chart of the routing iinformation processing method of one embodiment of the invention, and as shown in Figure 2, the method for present embodiment comprises:
Wherein, carry out the service traffics of route without described Router Reflector according to described routing iinformation.According to this routing iinformation, can transmission route between first routing device and the secondary route equipment to the service traffics of purpose route.Preferably, the part or all of routing iinformation that this routing iinformation is safeguarded in can the routing table for secondary route equipment, be that Router Reflector is when the routing iinformation with the secondary route plant maintenance sends to first routing device, can not delete identification information for the corresponding disconnection of all routing iinformation configurations, can only not delete identification information yet for the corresponding disconnection of part routing iinformation configuration.If this routing iinformation is whole routing iinformations of safeguarding in the routing table of secondary route equipment, then follow-up first routing device can adopt the GR mode to handle to these whole routing iinformations, if this routing iinformation is the part routing iinformation of safeguarding in the routing table of secondary route equipment, then follow-up first routing device can adopt the GR mode to handle to this part routing iinformation, and other routing iinformations of safeguarding in the routing table to secondary route equipment adopt normal modes to handle, thus make first routing device when adopting the routing iinformation processing method of present embodiment to the routing device of not supporting this technology without any influence.
The disconnection of present embodiment do not delete identification information be used to identify the routing iinformation corresponding with it when BGP connects passive disconnection, temporarily need not the deletion.This disconnection is not deleted in the extended field that identification information can be carried on renewal (update) message, perhaps is carried in the group attribute field of update message.Preferably, it is to be the routing iinformation configuration of corresponding secondary route equipment by Router Reflector that identification information is not deleted in described disconnection, and Router Reflector is configured in it in update message and sends to the first via by equipment.If this disconnection is not deleted in the extended field that identification information is carried on the update message, the attribute that can define this message is optional non-forwarding attribute, thereby makes first routing device that receives this message this information can be transmitted to other routing devices.Alternatively, if this disconnection is not deleted identification information and is carried in the group attribute field of update message, because it is optional forwarding that group attribute is given tacit consent to this message information, therefore, when receiving this, first routing device carries after disconnection do not delete the update message of identification information, need its egress policy of configuration, make this disconnection not delete identification information and be not forwarded to other routing devices.
Border Gateway Protocol (BGP) is the agreement that dynamic exchange routing iinformation between the autonomous system is gone up in the Internet (Internet).(Transmission Control Protocol is called for short: TCP) set up between peer-to-peer reliable the connection host computer using transmission control protocol of operation BGP.The validity that connects with maintenance BGP by timed sending keep-alive (KEEPALIVE) message between the routing device during BGP connects; do not receive KEEPALIVE message as routing device in the retention time (Holdtime); thinking then that BGP connects lost efficacy; disconnect this BGP and connect, and delete the routing iinformation of collecting from neighbours' routing device.In the present embodiment, whether regularly first routing device receives that by detecting KEEPALIVE message that Router Reflector sends can judge the BGP connection status between itself and the Router Reflector.
Specifically, in the present embodiment when the first via by Equipment Inspection to Router Reflector when BGP first routing device is connected disconnection, determine that at first this BGP connects whether disconnection is passive disconnection, promptly first routing device judges whether it is that the retention time (holdtime) to have occurred overtime or can't receive that two-way forwarding detects that (Bidirectional Forwarding Detection is called for short: message BFD) etc.If then can determine to have taken place passive disconnection.This passive disconnection may be to be caused by link failure between Router Reflector fault or the Router Reflector and first routing device etc.And in fact, because the service traffics of the routing iinformation route that first routing device sends according to Router Reflector are without this Router Reflector, so in fact these faults do not influence the transmission path of the service traffics between first routing device and the secondary route equipment.Therefore, first routing device can not deleted this part routing iinformation immediately when definite BGP connects passive disconnection, loses to avoid the service traffics in the service transmission path.
BGP Graceful Restart mechanism (Graceful Restart Mechanism for BGP, be called for short: BGP GR) be used at bgp neighbor routing device generation masterslave switchover, routing device is connected the smooth restarting of realizing agreement with BGP between its neighbours' routing device, to avoid the flow interrupt between neighbours' route in this process.In the present embodiment, first routing device is not deleted the corresponding routing iinformation of identification information to the disconnection with above-mentioned that receives from Router Reflector and is adopted Graceful Restart (GR) mode to handle.
Specifically, when the above-mentioned BGP of determining connects passive disconnection, first routing device obtains disconnection and does not delete identification information by traveling through its routing iinformation that receives from Router Reflector, does not carry out temporarily not deleting so that the service traffics in the transmission path are kept normal transmission to not deleting the corresponding routing iinformation of identification information with disconnection; After a period of time internal fault is eliminated, first routing device be connected with BGP between the Router Reflector rebulid after, first routing device is new routing information and finish GR more, return to normal condition, thereby guarantee to begin to finish to fault from fault, service traffics between the routing device are not subjected to the influence of this passive disconnection, guarantee that the service traffics normal transmission do not interrupt, thus the problem that the service traffics of having avoided transmitting are lost.Simultaneously, in the present embodiment, by Router Reflector is that identification information is not deleted in corresponding routing iinformation configuration disconnection, make first routing device need not by judging alternately that with the opposite end opposite end whether can GR, but when BGP connects passive disconnection, directly can not carry out the GR processing, thereby neighbours' route of having amplified the opposite end enters the condition that Graceful Restart is assisted equipment (GR helper) to not deleting the corresponding routing iinformation of identification information with disconnection.
Fig. 3 is the detail flowchart that first routing device adopts GR to handle among Fig. 2, and as shown in Figure 3, in concrete enforcement, above-mentioned steps 103 can comprise following detail operations:
Specifically, when BGP connects passive disconnection, first routing device is not temporarily deleted with disconnection and is not deleted the corresponding routing iinformation of identification information, but it is labeled as the stale state, is marked as the routing iinformation of stale state, because it is not deleted, also be in the state of being used, therefore, for the routing iinformation that is marked as the stale state, first routing device is aspect forwarding and routing, and is as broad as long with other routing iinformations that normally used.In this step, the routing iinformation that first routing device is not deleted the identification information correspondence with disconnection is labeled as the stale state, thereby when guaranteeing that BGP is connected passive disconnection between first routing device and the Router Reflector, the routing of first routing device and forwarding do not change, forward-path between first routing device and the secondary route equipment does not change yet, and has guaranteed the unimpeded of delivery flow rate.
In concrete the application, BGP connected in passive disconnection a period of time, after causing that fault that BGP connects passive disconnection is eliminated, can rebulid BGP between first routing device and the Router Reflector and be connected, and collect routing update information from Router Reflector.Each first routing device is receiving that the expression Router Reflector sends the routing information base end (End-of-RIB that routing information base finishes, be called for short: EOR) when information or EOR timer expiry, first routing device can be removed the stale status indication of the routing iinformation that is in state to be aging or trigger delete flag according to the route learning situation is the stale state, promptly be in state to be aging, routing iinformation.Wherein, EOR represents that Router Reflector has received the routing iinformation of part or all of neighbor device, is the sign that routing information base finishes, after Router Reflector is sent completely its all routing iinformations, can send an EOR information, so that neighbours confirm to have learnt all routes.In the present embodiment, first routing device can have been learnt all routes according to this EOR validation of information, thereby the GR that takes before processing can normal termination.
Specifically, first routing device should delete flag be the routing iinformation of stale state then if do not receive the lastest imformation of above-mentioned temporarily stored routing iinformation when receiving EOR information or EOR timer expiry; If first routing device had been received the lastest imformation of the routing iinformation that is labeled as the stale state before receiving EOR information, the normal data of transmitting between the routing device that explanation can be corresponding with this routing iinformation, then should remove the stale status indication of this routing iinformation, make this routing iinformation recover normal condition.Finish the renewal of promptly having finished routing iinformation after delete flag is the routing iinformation of stale state and the stale status indication of removing routing iinformation when routing device, end is handled the GR of current routing iinformation, connects disconnection to connecting the transition that recovers thereby finish BGP.
In the present embodiment, first routing device is when determining it and BGP between the Router Reflector is connected passive disconnection, the routing iinformation with the corresponding secondary route equipment of identification information is not deleted in disconnection that this Router Reflector is sent adopts Graceful Restart GR mode to handle, and does not promptly temporarily delete this routing iinformation to keep transmission path.On the one hand, be to carry out the routing iinformation configuration disconnection that GR handles not delete identification information by Router Reflector, first routing device need not to have amplified the condition that the opposite end enters GR helper by judging that with opposite end mutual the opposite end whether can GR; On the other hand, temporarily do not delete routing iinformation by adopting the GR mode, after making that BGP connects passive disconnection, if this BGP is connected in a period of time and can rebulids, then the current service traffics transmission path that carries out of first routing device is constant, assurance flow normal transmission is not interrupted, avoided in the prior art being in the problem that the service traffics of the transmission that the routing iinformation of routing device on the forward-path causes are lost because of deletion, thereby not only improved the service traffics transmission quality, and helped the stability of Network Transmission.
Fig. 4 is the flow chart of the routing iinformation processing method of one embodiment of the invention, as shown in Figure 4, present embodiment is after above-mentioned step 101 shown in Figure 2, if BGP connects initiatively disconnection, then will delete the routing iinformation that all are collected from Router Reflector, the method for present embodiment specifically comprises:
If passive disconnection is execution in step 203 then, if initiatively disconnection, then execution in step 204, and step 203 is an operating procedure arranged side by side with step 204.
All routing iinformations that step 204, the described first via are sent by the described Router Reflector of unit deletion.
In concrete the application, if the first via by Equipment Inspection to BGP connect initiatively disconnection, configuration change as first routing device or Router Reflector, neighbours' deletion etc., then keep former processing, promptly delete BGP and connect all routing iinformations that disconnection is received from this Router Reflector before, thereby first routing device can connect disconnection type different mining according to BGP to be handled with corresponding, promptly first routing device is in operation and judges it and is connected the active disconnection with BGP between the Router Reflector if detect, then carrying out the routing iinformation deletion according to existing method handles, if passive disconnection, then adopt the method that provides in the embodiment of the invention to carry out GR and handle, thereby first routing device can be handled its routing iinformation accordingly according to actual conditions
Fig. 5 is the flow chart of the routing iinformation processing method of one embodiment of the invention, and as shown in Figure 5, the method for present embodiment comprises:
Wherein, carry out the service traffics of route without described Router Reflector according to described routing iinformation.
In the prior art, Router Reflector generally is directly this routing iinformation to be transmitted to first routing device when receiving the routing iinformation of secondary route equipment, and in the present embodiment, Router Reflector is not only transmitted routing iinformation, also identification information is not deleted in corresponding disconnection to the route information configuration, and this identification information also sent to first routing device, thereby make follow-up first routing device carry out special processing to the routing iinformation of this identification information correspondence.By Router Reflector configuration identifier information, make when follow-up first routing device takes GR to handle, need not by judging that with opposite end mutual the opposite end whether can GR, thereby amplified the condition that the opposite end enters GR Helper.
Wherein, disconnection is not deleted in the extended field that identification information can be disposed at renewal (update) message, and the attribute that defines this message is optional non-forwarding attribute, thereby first routing device can further not transmitted this identification information, also can be disposed in the group attribute field of update message, after first routing device receives this identification information, need to dispose its egress policy, make this disconnection not delete identification information and be not forwarded to other routing devices.
Router Reflector is when the issue routing iinformation, can directly transmit processing to the routing iinformation of its reception, also can distribute certain sign so that the routing device that receives this kind sign carries out special processing to the routing iinformation of this kind sign correspondence for corresponding routing iinformation.In the present embodiment, Router Reflector distributes disconnection not delete identification information for the routing iinformation of the secondary route equipment of its reception, can not delete immediately when the passive disconnection of BGP in order to identify corresponding routing iinformation, but adopt the GR mode to handle, thereby the service traffics that making BGP connect passive disconnection does not influence between the routing device are transmitted, and have improved the stability of professional transmission in the network.
In the present embodiment, Router Reflector is that the routing iinformation of secondary route equipment distributes corresponding disconnection not delete identification information, and identification information is not deleted in the routing iinformation of described secondary route equipment and this disconnection sent to first routing device yet, when Router Reflector with after BGP between first routing device is connected passive disconnection, first routing device can adopt the GR mode to handle to the routing iinformation that the identification information correspondence is not deleted in disconnection, temporarily do not delete this routing iinformation, the flow that assurance is on the service transmission path does not interrupt, avoid traffic loss, improved the Network Transmission quality; Simultaneously, dispose this identification information during by Router Reflector issue routing iinformation, make first routing device need not to carry out corresponding GR ability decision operation when taking GR to handle with the opposite end to route information.
Fig. 6 is the structural representation of the routing device of one embodiment of the invention, as shown in Figure 6, first routing device in the present embodiment comprises: receiving element 10, determining unit 11 and processing unit 12, wherein, receiving element 10 is used for not deleting identification information from the routing iinformation of Router Reflector reception secondary route equipment and the disconnection corresponding with described routing iinformation; Determining unit 11 is used for determining that described first routing device is connected passive disconnection with Border Gateway Protocol (BGP) between the described Router Reflector; Processing unit 12 pair is not deleted the corresponding routing iinformation of identification information with described disconnection when being used for described BGP and connecting passive disconnection and is adopted Graceful Restart (GR) mode to handle.
Wherein, carry out the service traffics of route without described Router Reflector according to described routing iinformation.
In the present embodiment, BGP connects just often, receiving element 10 can receive the routing iinformation of the secondary route equipment that Router Reflector transmits and not delete identification information at the disconnection of this routing iinformation from Router Reflector, when determining unit 11 determines that BGP connects passive disconnection, the routing iinformation that processing unit 12 receives from Router Reflector by traversal obtains disconnection and does not delete identification information, does not adopt the GR mode to handle to not deleting the corresponding routing iinformation of identification information with disconnection.In concrete the application, whether determining unit 11 receives regularly that by receiving element 10 KEEPALIVE message that Router Reflector sends can judge the BGP connection status between first routing device and the Router Reflector, as connects normal or connect and interrupt.Connect to interrupt comprising can be by holdtime overtime or can't receive the passive disconnection that BFD message etc. is determined, comprise that also configuration change, neighbours owing to routing device or Router Reflector such as delete at the active disconnection that produces.When determining passive disconnection takes place, processing unit 12 can adopt corresponding GR mode to handle, and is not interrupted with the flow that is transmitting between maintenance and the secondary route equipment, avoids traffic loss.
Present embodiment can be used for carrying out the technical scheme of above-mentioned method embodiment shown in Figure 2, and its know-why and technique effect are similar, repeat no more.
Fig. 7 is the structural representation of the routing device of one embodiment of the invention, as shown in Figure 7, in concrete the application, above-mentioned processing unit 12 in embodiment illustrated in fig. 6 can comprise: handle subelement 121 and mark subelement 122, wherein, mark subelement 122 is connected with determining unit 11 with receiving element 10 respectively, is used for will not deleting the corresponding routing iinformation of identification information with described disconnection when described BGP connects passive disconnection and is labeled as (stale) to be aging state; Handling subelement 121 is connected with receiving element 10, be used for receiving the routing iinformation that Router Reflector sends at receiving element 10, described first routing device and described Router Reflector rebulid after BGP is connected, and delete flag is the routing iinformation of stale state or the mark of removing the stale state of routing iinformation.Wherein, handle subelement 121 and can be subdivided into a plurality of processing subelements according to function, as be divided into routing iinformation deletion subelement and the tag delete subelement (not shown) that is connected with receiving element 10 respectively, routing iinformation deletion subelement is used for not receiving that delete flag is the routing iinformation of stale state under the situation of lastest imformation of the routing iinformation that is labeled as the stale state when first routing device is receiving that routing information base finishes (EOR) information or EOR timer expiry; The tag delete subelement is used for receiving before first routing device is receiving EOR information under the situation of lastest imformation of the routing iinformation that is labeled as the stale state, removes the mark of the stale state of this routing iinformation.
In addition, processing unit 12 also is used for when determining unit 11 determines that BGP is connected to above-mentioned active disconnection, all routing iinformations that deletion receiving element 10 receives from Router Reflector.
Present embodiment can be used for carrying out the technical scheme of above-mentioned Fig. 2 or method embodiment shown in Figure 4, and its know-why and technique effect are similar, repeat no more.
Above-mentioned Fig. 6 or embodiment illustrated in fig. 7 in, can also comprise: the dispensing unit (not shown) that is connected with receiving element 10, be used for receiving disconnection that Router Reflector sends when not deleting identification information and being carried at the group attribute field of update message when receiving element 10, dispose the egress policy of first routing device, this update message that carries this information is not forwarded.Because Router Reflector is the disconnection of disposing in the routing iinformation not to be deleted identification information and need not routing device and further be transmitted to other routing devices again, so this information is configured in the extended field of update message generally speaking, and the attribute that defines this message is optional non-forwarding, but Router Reflector also can be the application of simplifying routing policy and the difficulty that reduces maintenance management, this identification information is configured to the group attribute mode to be issued, but group attribute is defaulted as optional forwarding, be not routed device forwards for making this disconnection not delete identification information, receive this disconnection when not deleting identification information at the receiving element 10 of first routing device in the embodiment of the invention, by dispensing unit the identification information deletion or not in this disconnection and make it not be transmitted to other routing devices.
Fig. 8 is the structural representation of the Router Reflector of one embodiment of the invention, and as shown in Figure 8, the Router Reflector of present embodiment comprises: receiving element 20, dispensing unit 21 and transmitting element 22.Wherein, receiving element 20, wherein, receiving element 20 is used to receive the routing iinformation of secondary route equipment, wherein, carries out the service traffics of route without described Router Reflector according to described routing iinformation between first routing device and the secondary route equipment; Dispensing unit 21 is used to the corresponding disconnection of described routing iinformation configuration not delete identification information; Transmitting element 22, be used for that identification information is not deleted in described routing iinformation and described disconnection and send to first routing device, so that described first routing device at described first routing device when Border Gateway Protocol (BGP) between the described Router Reflector is connected passive disconnection, adopt Graceful Restart GR mode to handle to not deleting the corresponding routing iinformation of identification information with described disconnection.
Router Reflector is not deleted identification information by the routing iinformation configuration disconnection for its reception, and this identification information also sent to first routing device, make when BGP connects passive disconnection, first routing device can adopt the GR mode handle according to this identification information pair routing iinformation corresponding with it, guarantees that BGP connects passive disconnection and do not influence business transmission between the routing device.In concrete the enforcement, dispensing unit 21 can not deleted disconnection in the extended field that identification information is configured in the update message and is defined as optional non-forwarding attribute, it can be configured in the group attribute field of update message yet.
Present embodiment can be used for carrying out the technical scheme of above-mentioned method embodiment shown in Figure 5, and its know-why and technique effect are similar, repeat no more.
Fig. 9 is the structural representation of the routing processing system of one embodiment of the invention, and as shown in Figure 9, the system of present embodiment comprises: Router Reflector 200 and the routing device 100 that is connected with Router Reflector 200, routing device 300.Wherein, Router Reflector 200 is a Router Reflector embodiment illustrated in fig. 8, routing device 100 and routing device 300 be above-mentioned Fig. 6 or embodiment illustrated in fig. 7 in routing device.
In the present embodiment, after routing device 100 sends to Router Reflector 200 with its routing iinformation, Router Reflector 200 can not deleted identification information for the corresponding disconnection of the routing iinformation of routing device 100 configuration, and identification information is not deleted in routing iinformation and disconnection is sent to routing device 300 together.When routing device 300 when BGP between the Router Reflector 200 is connected passive disconnection, routing device 300 can obtain disconnection and not delete identification information by traveling through its routing iinformation that receives from Router Reflector 200, and adopt the GR mode to handle to the routing iinformation that the identification information correspondence is not deleted in this disconnection, temporarily do not delete, thereby can guarantee that the service traffics between routing device 100 and the routing device 300 do not interrupt.
Present embodiment can be used for finishing the technical scheme of above-mentioned Router Reflector embodiment and the arbitrary embodiment of above-mentioned routing device, and its operation principle and the technique effect that reaches are similar, repeat no more.
Figure 10 is the flow chart that routing device is handled routing iinformation in the one embodiment of the invention, and in above-mentioned arbitrary embodiment, the routing device during BGP connects can be handled with reference to flow chart shown in Figure 10 when detecting BGP connection disconnection.Specifically, routing device judges at first whether this disconnection is passive disconnection after detecting BGP connection disconnection, if not all routing iinformations that receive from this Router Reflector are then deleted in passive disconnection; If passive disconnection, then the routing iinformation that receives from this Router Reflector by traversal obtains disconnection and does not delete identification information, and the routing iinformation of the disconnection with correspondence not being deleted identification information is labeled as the stale state; And the routing iinformation that does not have corresponding disconnection not delete identification information is deleted; In a period of time afterwards, after routing device and Router Reflector rebulid BGP and be connected, receive before the EOR information, judge whether to receive the lastest imformation of the routing iinformation that is labeled as the stale state.If do not receive, then after receiving EOR or during the EOR timer expiry, delete the routing iinformation that this is labeled as the stale state; If receive, continue to instruct flow to transmit after then upgrading route, this BGP connects and returns to normal network connection state.When adopting the routing device of this kind processing method can guarantee it and BGP between the Router Reflector is connected disconnection, the temporary transient routing iinformation that is in other routing devices on the forward-path of not deleting, thereby the service traffics transmission is not interrupted between the assurance routing device, improve network stabilization, just avoid losing of on transmission path service traffics simultaneously, improved the Network Transmission quality.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not limit it, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solution of the present invention.
Claims (13)
1. a routing iinformation processing method is characterized in that, comprising:
First routing device is not deleted identification information from the routing iinformation of Router Reflector reception secondary route equipment and the disconnection corresponding with described routing iinformation, and wherein, the service traffics of carrying out route according to described routing iinformation are without described Router Reflector;
Described first routing device determines that described first routing device is connected passive disconnection with Border Gateway Protocol (BGP) between the described Router Reflector;
Described first routing device pair is not deleted the corresponding routing iinformation of identification information with described disconnection and is adopted Graceful Restart GR mode to handle.
2. method according to claim 1 is characterized in that, described first routing device pair is not deleted the corresponding routing iinformation of identification information with described disconnection and adopted Graceful Restart GR mode to handle, and specifically comprises:
Described first routing device will not deleted the corresponding routing iinformation of identification information with described disconnection and will be labeled as stale state to be aging;
Described first routing device is rebuliding after BGP is connected with described Router Reflector, and delete flag is the routing iinformation of stale state or the mark of removing the stale state of routing iinformation.
3. method according to claim 2 is characterized in that, described first routing device is after rebuliding the BGP link with described Router Reflector, and delete flag is the routing iinformation of stale state, comprising:
Described first routing device is not if receive the lastest imformation of the routing iinformation that is labeled as the stale state when receiving that routing information base finishes EOR information or EOR timer expiry, then delete flag is the routing iinformation of stale state.
4. according to claim 2 or 3 described methods, it is characterized in that described first routing device is removed the mark of the stale state of routing iinformation rebuliding after BGP is connected with described Router Reflector, comprising:
Described first routing device is then removed the mark of the stale state of this routing iinformation if received the lastest imformation of the routing iinformation that is labeled as the stale state before receiving EOR information.
5. according to each described method in the claim 1～4, it is characterized in that described disconnection is not deleted identification information and is carried in the extended field that upgrades the update message, or is carried in the group attribute field of update message.
6. a routing iinformation processing method is characterized in that, comprising:
Router Reflector receives the routing iinformation of secondary route equipment, and wherein, the service traffics of carrying out route according to described routing iinformation are without described Router Reflector;
Described Router Reflector is that identification information is not deleted in the corresponding disconnection of described routing iinformation configuration;
Described Router Reflector is not deleted identification information with described routing iinformation and described disconnection and is sent to first routing device, so that described first routing device at described first routing device when Border Gateway Protocol (BGP) between the described Router Reflector is connected passive disconnection, adopt Graceful Restart GR mode to handle to not deleting the corresponding routing iinformation of identification information with described disconnection.
7. a routing device is characterized in that, comprising:
Receiving element is used for not deleting identification information from the routing iinformation of Router Reflector reception secondary route equipment and the disconnection corresponding with described routing iinformation, and wherein, the service traffics of carrying out route according to described routing iinformation are without described Router Reflector;
Determining unit is used for determining that described first routing device is connected passive disconnection with Border Gateway Protocol (BGP) between the described Router Reflector;
Processing unit is used for when described BGP connects passive disconnection, does not adopt Graceful Restart GR mode to handle to not deleting the corresponding routing iinformation of identification information with described disconnection.
8. first routing device according to claim 7 is characterized in that, described processing unit comprises:
The mark subelement is used for when described BGP connects passive disconnection, will not delete the corresponding routing iinformation of identification information with described disconnection and is labeled as stale state to be aging;
Handle subelement, be used for rebuliding after BGP is connected at described first routing device and described Router Reflector, delete flag is the mark of the stale state of the routing iinformation of stale state or removal routing iinformation.
9. first routing device according to claim 8 is characterized in that, described processing subelement comprises:
Routing iinformation deletion subelement, be used for when described first routing device receives that routing information base finishes EOR information or EOR timer expiry, not receiving that delete flag is the routing iinformation of stale state under the situation of lastest imformation of the routing iinformation that is labeled as the stale state.
10. according to Claim 8 or 9 described first routing devices, it is characterized in that described processing subelement comprises:
The tag delete subelement is used for receiving before described first routing device receives EOR information under the situation of lastest imformation of the routing iinformation that is labeled as the stale state, removes the mark of the stale state of this routing iinformation.
11., it is characterized in that described processing unit also is used for deleting all routing iinformations that described Router Reflector sends when described BGP connects initiatively disconnection according to each described first routing device in the claim 7～10.
12. a Router Reflector is characterized in that, comprising:
Receiving element is used to receive the routing iinformation of secondary route equipment, and wherein, the service traffics of carrying out route according to described routing iinformation are without described Router Reflector;
Dispensing unit is used to the corresponding disconnection of described routing iinformation configuration not delete identification information;
Transmitting element, be used for that identification information is not deleted in described routing iinformation and described disconnection and send to first routing device, so that described first routing device at described first routing device when Border Gateway Protocol (BGP) between the described Router Reflector is connected passive disconnection, adopt Graceful Restart GR mode to handle to not deleting the corresponding routing iinformation of identification information with described disconnection.
13. routing iinformation treatment system, it is characterized in that, comprise: Router Reflector as claimed in claim 12 and at least two routing devices that are connected with described Router Reflector, wherein at least one described routing device is as each described first routing device in the claim 7～11.
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