CN103354521A - LDP-based optimization method and device for LSP update - Google Patents
LDP-based optimization method and device for LSP update Download PDFInfo
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Abstract
The invention provides an LDP (Label Distribution Protocol)-based optimization method and device for LSP (Label Switched Path) update. The technical scheme is that FEC-label map records in mutual transmission through an LDP session are marked and label forwarding table items corresponding to the FEC-label map records are remained and a timer is started when the LDP session between the LDP-based optimization device and an opposite-end device is interrupted abnormally. Before time set on the timer runs out, marks of the FEC-label map records are cleared through re-sending FEC-label map if the LDP session recovers. After the time set on the timer runs out, the FEC-label map records with the marks that are not cleared are deleted and the label forwarding table items corresponding to the FEC-label map records are updated. By adopting the technical scheme, CPU resource consumption can be reduced.
Description
Technical field
The application relates to communication technical field, particularly optimization method and the device of a kind of label switched path based on tag distribution protocol (Label Distribution Protocol, LDP) (Label Switched Path, LSP) renewal.
Background technology
MPLS(Multi-protocol Label Switching, multiprotocol label switching) is a kind of emerging IP backbone technology, introduce connection-oriented label switching concept in connectionless IP network, the 3rd layer of route technology and second layer switching technology are combined, given full play to the simple and direct property of flexibility and two layers of exchange of IP route.
LDP is responsible for dividing forwarding equivalence class (FEC, the message that belongs to identical FEC will obtain identical processing in the MPLS network), announcement FEC-label mapping, Dynamic Establishing and safeguards label switched path (Label Switched Path, LSP) etc.Utilize the process of LDP Dynamic Establishing LSP as shown in Figure 1: downstream LSR (Label Switching Router, LSR) divide FEC according to purpose IP address, be specific FEC distributing labels, set up local ILM(Incoming Label Map, enter label mapping) list item, and the FEC-label mapping announced the direction that represents FEC-label mapping announcement to the dotted line with arrow among the LSR(Fig. 1 of upstream); Upstream LSR sets up down hop label forwarding list item (NHLFE) and FTN(FEC to NHLFE map according to this FEC-label mapping, and FEC is to the mapping of NHLFE) list item, set up the ILM list item according to this LSR for the label that this FEC distributes again.For the FEC-label mapping of receiving from neighbours LSR, if neighbours LSR is not the down hop of this FEC, then this label can not be used for message repeating, and namely LSP must be consistent with optimum route.When all LSR on the message forwarding path are after this FEC sets up corresponding label forwarding list item, just successfully set up to be used for transmitting the LSP that belongs to this FEC.
According to the position of the node on the LSP with respect to LSP, the node on the LSP is divided into outlet (Egress) node, centre (Transit) node, entrance (Ingress) node.On the LSP of same FEC, a node can be Transit node and Ingress node simultaneously.The LSP fragment that LSP is distributed on the node is called Egress LSP, Transit LSP, Ingress LSP, respectively label forwarding list item shown in corresponding diagram 2a, Fig. 2 b and Fig. 2 c.Wherein, in Egress LSP corresponding label forwarding-table item (ILM list item), enter label and be the label of upstream LSR announcement of this LSR, tag operational is pop, and outgoing label is invalid, and outgoing interface and down hop can be determined according to routing table lookup.In Transit LSP corresponding label forwarding-table item (ILM list item), enter label and be the label of upstream LSR announcement of this LSR, tag operational is swap, and outgoing label is the label of downstream LSR announcement, and outgoing interface is downstream LSR for interface, the down hop that connects downstream LSR.In label forwarding list item corresponding to Ingress LSP (FTN list item), tag operational is push, and outgoing label is the label of downstream LSR announcement, and outgoing interface is downstream LSR for interface, the down hop that connects downstream LSR.
In the prior art, when this equipment Inspection to and opposite equip. between LDP session DOWN the time, if opposite equip. does not require this equipment and carries out GR(Graceful Restart as opposite equip., Graceful Restart) the GR Helper during process, then can be on control plane, directly deletion receives the FEC-label mapping receiving record that creates behind the label and sends the FEC-label mapping that creates behind the label by this LDP session and sends record, and on datum plane, do not consider FEC-Label binding ability situation and the other factors of opposite equip., directly upgrade label forwarding list item corresponding to FEC and (comprise ILM list item and/or FTN list item, upstream neighbor device is sent as the FEC-label mapping that creates behind the label of this FEC distribution and sends record, and receive the FEC-label mapping receiving record that creates behind the label that upstream neighbor equipment distributes for this FEC all corresponding to this label forwarding list item from downstream neighbor equipment), so that after message arrives this equipment, the label forwarding message of no longer announcing according to opposite equip., but the forwarding of termination message on the LSP of this FEC.After LDP session between this equipment and the opposite equip. rebulids, then need again also again to create the FEC-label mapping to opposite equip. announcement label and send record, also can receive the label mapping of opposite equip. announcement and again create FEC-label mapping receiving record.
Referring to MPLS networking shown in Figure 3, comprising LSR1, LSR2, LSR3, LSR4, LSR5, the message repeating direction is from LSR5 to LSR1, corresponding specific FEC is assumed to be FEC2, LSR4 has two downstream neighbor LSR2 and LSR3, preferred down hop is the interface IP address nexthop1 of LSR2, and LSR4 is LabelD for the label of this FEC distribution, and the label that receives from LSR2 and LSR3 is respectively LabelB and LabelC.Under normal circumstances, the label forwarding list item that generates of LSR4 shown in Fig. 4 a the ILM list item and the FTN list item shown in Fig. 4 b.
When the LDP conversation between LSR2 and the LSR4, LSR4 can delete from LSR2 and receive the FEC-label mapping record that creates behind the label LabelB: FEC2-LabelB, and the ILM list item is ILM list item shown in Fig. 4 a ' shown in renewal Fig. 4 a, so that after LSR4 receives the message that LSR5 sends, eject carrying label LabelD in the message according to ILM list item shown in Fig. 4 a ', then E-Packet according to routing table.When the LDP session between LSR2 and the LSR4 recovered, to LSR4 announcement label LabelB, LSR4 created FEC-LabelB to LSR2 again again.
When the link concussion causes LDP session concussion, need to repeatedly delete and create FEC-label mapping record (comprise and send record and receiving record), the LDP control plane is processed many, the consumption systems cpu resource, prolong datum plane list item convergence time, caused the flow interrupt time long.And, during owing to LDP session DOWN, do not consider the FEC-Label binding ability situation of opposite equip., directly upgrade label forwarding list item corresponding to FEC, also can the consumption systems cpu resource.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of optimization method that upgrades based on the LSP of LDP, the method can reduce cpu resource consumption.
For achieving the above object, technical scheme provided by the invention is:
A kind of optimization method that upgrades based on the LSP of LDP comprises:
When detecting connecting link and interrupting causing LDP session DOWN between this equipment and the opposite equip., all FEC-label mapping records of described LDP session association are labeled as undecided state and keep label forwarding list item corresponding to each FEC-label mapping record constant, start first timer; Described FEC-label mapping record comprises that the FEC-label mapping sends record and FEC-label mapping receiving record;
Before first timer is overtime, if described LDP session recovers, then each the FEC-label mapping for described LDP session association sends record, removing this FEC-label mapping sends the undecided state of record and again sends this FEC-label mapping to opposite equip., each FEC-label mapping receiving record for described LDP session association, if receive this FEC-label mapping that opposite equip. resends, then remove the undecided state of this FEC-label mapping receiving record;
After first timer is overtime, all FEC-label mappings that undecided state is not removed in deletion send record, for each FEC-label mapping receiving record of not removing undecided state, delete this FEC-label mapping receiving record, and label forwarding list item corresponding to this FEC-label mapping receiving record is updated to the label forwarding list item of transmitting along LSP for the termination message.
A kind of optimized device that upgrades based on the label switching path LSP of label advertizing protocol LDP, this equipment comprises: detecting unit, control unit, Transmit-Receive Unit;
Described detecting unit for detection of the state of the LDP session between this equipment and the opposite equip., and is judged the reason that causes described LDP session DOWN when detecting described LDP session DOWN;
Described control unit, when interrupting causing LDP session DOWN between this equipment and the opposite equip. for detection of unit inspection to connecting link, all FEC-label mapping records of described LDP session association are labeled as undecided state and keep label forwarding list item corresponding to each FEC-label mapping record constant, start first timer; Described FEC-label mapping record comprises that the FEC-label mapping sends record and FEC-label mapping receiving record; Be used for before first timer is overtime, if described LDP session recovers, then each the FEC-label mapping for described LDP session association sends record, removing this FEC-label mapping sends the undecided state of record and notifies Transmit-Receive Unit again to send this FEC-label mapping to opposite equip., each FEC-label mapping receiving record for described LDP session association, if Transmit-Receive Unit receives this FEC-label mapping that opposite equip. resends, then remove the undecided state of this FEC-label mapping receiving record; Be used for after first timer is overtime, all FEC-label mappings that undecided state is not removed in deletion send record, for each FEC-label mapping receiving record of not removing undecided state, delete this FEC-label mapping receiving record, and label forwarding list item corresponding to this FEC-label mapping receiving record is updated to the label forwarding list item of transmitting along LSP for the termination message;
Described Transmit-Receive Unit is used for sending the FEC-label mapping according to the notice of control unit to opposite equip.; Be used for receiving the FEC-label mapping that opposite equip. sends.
In sum, among the present invention, behind the LDP session DOWN between this equipment and the opposite equip., the FEC-label mapping record of sending out mutually by this LDP session is carried out mark and keeps label forwarding list item corresponding to each FEC-label mapping record constant, start a timer; Before timer time is overtime, if this LDP session recovers, then remove the mark of each FEC-label mapping record by retransmitting the FEC-label mapping, because in this process; Behind timer expiry, deletion is not removed each FEC-label mapping of mark and is upgraded label forwarding list item corresponding to this FEC-label mapping.The LDP session is in the situation that first timer recovered in the time, remove the mark of each FEC-label mapping by retransmitting each FEC-label mapping, do not need deletion and again establishment carried out in this FEC-label mapping record, and label forwarding list item corresponding to this FEC-label mapping record also remains unchanged in this process, therefore, can effectively reduce the cpu resource consumption of system.
Description of drawings
Fig. 1 is the process schematic diagram that prior art is utilized LDP Dynamic Establishing LSP;
Fig. 2 a is label forwarding list item schematic diagram corresponding to prior art Egress LSP;
Fig. 2 b is label forwarding list item schematic diagram corresponding to prior art Transit LSP;
Fig. 2 c is label forwarding list item schematic diagram corresponding to prior art Igress LSP;
Fig. 3 is prior art MPLS networking schematic diagram;
Fig. 4 a is prior art ILM list item schematic diagram corresponding to FEC2 that LSR4 generates among Fig. 3 under normal circumstances;
Fig. 4 b is prior art FTN list item schematic diagram corresponding to FEC2 that LSR4 generates among Fig. 3 under normal circumstances;
Fig. 4 a ' is ILM list item schematic diagram corresponding to FEC2 after LSR4 upgrades among Fig. 3 in the prior art LDP session DOWN situation;
Fig. 4 b ' is FTN list item schematic diagram corresponding to FEC2 after LSR4 upgrades among Fig. 3 in the prior art LDP session DOWN situation;
Fig. 4 a ' ' is the ILM list item schematic diagram that calculates behind the prior art LDP session DOWN after LSR4 upgrades among Fig. 3 in the new down hop situation of FEC2;
Fig. 4 b ' ' is the FTN list item schematic diagram that calculates behind the prior art LDP session DOWN after LSR4 upgrades among Fig. 3 in the new down hop situation of FEC2;
Fig. 5 is that the embodiment of the invention one is based on the optimization method flow chart of the LSP renewal of LDP;
Fig. 6 is that the embodiment of the invention two is based on the optimization method flow chart of the LSP renewal of LDP;
Fig. 7 is the optimized device that upgrades based on the LSP of LDP that the embodiment of the invention provides.
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.
In the embodiment of the invention, for the LDP session DOWN that different reasons cause, adopt different optimisation strategy to carry out LSP and upgrade.Here, LDP session DOWN refers to that the session of operational state interrupts unusually.
Cause the reason of LDP session DOWN to mainly contain following several: the equipment room connecting link is interrupted; LDP session opposite equip. fault; Normal and the control plane fault of LDP datum plane; LDP ability on the interface goes to enable.Among the present invention, interrupt mainly for the equipment room connecting link, and the LDP datum plane is normal, the LSP renewal process after the LDP conversation that two kinds of situations of control plane fault cause is optimized.
Referring to Fig. 5, Fig. 5 optimization method flow chart that to be the embodiment of the invention one upgrade based on the LSP of LDP, LSP upgrades when interrupting causing LDP session DOWN optimization that the method is applicable to the equipment room connecting link mainly may further comprise the steps:
Here, described FEC-label mapping record comprises that the FEC-label mapping sends record and FEC-label mapping receiving record; Wherein, it is that this equipment sends record for the FEC-label mapping that the FEC-label mapping that sends to opposite equip. by described LDP session creates that the FEC-label mapping sends record, and FEC-label mapping receiving record is that the FEC-label mapping that FEC-label mapping that this equipment sends for the opposite equip. that receives by described LDP session creates sends record.
In embodiments of the present invention, when the connecting link between this equipment and the opposite equip. interrupts causing LDP session DOWN, all the FEC-label mappings that can not delete at once by this LDP session association send record and FEC-label mapping receiving record, but these FEC-label mapping records are carried out mark, each FEC-label mapping record wherein is labeled as undecided state and keeps label forwarding list item corresponding to this FEC-label mapping record constant, also need simultaneously to start a timer (first timer), be used for controlling the time that label forwarding list item corresponding to each FEC-label mapping record remains unchanged.
Here, the timeout value of above-mentioned first timer and the second timer mentioned hereinafter can rule of thumb be set.This timeout value has relation with the processing speed of processing the CPU of these route table items on the quantity of route list item on the concrete equipment and the concrete equipment.For example, can set in advance a default value, discovery time is oversize or too in short-term in use procedure, again by the configuration order correction once.Common above-mentioned timer can be other timer of minute level, and for example, timeout value is default to be arranged between 3 ?6 minutes.
LSR4 in the MPLS networking shown in Figure 3 is as example, when the LDP conversation between LSR4 and the LSR2, suppose that the specific FEC from LSR1 to the LSR5 direction is FEC1, specific FEC from LSR5 to the LSR1 direction is FEC2, after then LSR4 sends label LabelA to LSR2, can create the FEC-label mapping and send record: FEC1-LabelA, and generate the corresponding label forwarding-table item; After LSR4 receives the label LabelB of LSR2 transmission, the FEC-label mapping receiving record that can create: FEC2-LabelB, and generate the corresponding label forwarding-table item.When the connecting link between LSR4 and the LSR2 interrupts causing LDP session DOWN, LSR4 can all be labeled as undecided state with FEC1-LabelA and FEC2-LabelB, and keep label forwarding list item corresponding to FEC1-LabelA, and label forwarding list item corresponding to FEC2-LabelB is constant.
In the embodiment of the invention, at first timer in the time, if the LDP session between this equipment and the opposite equip. recovers, then each the FEC-label mapping for the LDP session association sends record, this equipment need to be removed the undecided state of this FEC-label mapping and resend this FEC-label mapping to opposite equip., in order to recover the LSP of corresponding FEC; For each FEC-label mapping receiving record of LDP session association, if this equipment receives this FEC-label mapping that opposite equip. sends again, then can remove the undecided state of this FEC-label mapping record, in order to recover the LSP of corresponding FEC.For example, in Fig. 3, if the LDP session between LSR4 and the LSR2 recovers in the time at first timer, then LSR4 can announce label LabelA again to LSR2, and LSR2 also can announce LabelB again to LSR4.When LSR4 announces label LabelA again to LSR2, also can remove simultaneously the undecided state of FEC1-LabelA; And when receiving the LabelB of LSR2 announcement, can remove the undecided state of FEC2-LabelB.
For arbitrary FEC-label mapping record of having removed undecided state, because the whole process of recovering from LDP session DOWN to the LDP session, the operation of only this FEC-label mapping record having been carried out mark and having been removed mark, and do not carry out deletion action, and label forwarding list item corresponding to this FEC-label mapping record also remains unchanged always, therefore, can effectively reduce the system CPU resource consumption.
In the MPLS network, equipment adopts following two kinds of FEC-label mapping modes: first kind FEC-label mapping mode and Second Type FEC-label mapping mode.
When an equipment adopts first kind FEC-label mapping, this equipment is announced same label for same FEC to the opposite equip. of Different L DP session, this is so that the LDP session between the upstream neighbor equipment of the ILM list item of this FEC that this equipment generates and this equipment and this equipment is irrelevant, behind the LDP session DOWN between the upstream neighbor equipment of this equipment and this equipment, if the upstream neighbor equipment of this equipment is still according to the label forwarding message of this devices advertise before this, then this equipment still can find the ILM list item of this FEC and E-Packet according to the ILM list item that finds.
Here, need to prove that the upstream of mentioning among the application or downstream neighbor equipment are all for the LSP direction.For example in Fig. 3, for FEC1, its LSP direction is from LSR1 to LSR5, so LSR2 is the upstream neighbor equipment of LSR4, for FEC2, its LSP direction be LSR5 to LSR1, so LSR4 is the upstream neighbor equipment of LSR2.
When an equipment adopts Second Type FEC-label mapping mode, this equipment is announced different labels for same FEC to the opposite equip. of Different L DP session, this is so that the LDP session between the upstream neighbor equipment of the ILM list item of this FEC that this equipment generates and this equipment and this equipment is relevant, behind LDP session DOWN between the upstream neighbor equipment of this equipment and this equipment, the ILM list item that needs this FEC of deletion, if the upstream neighbor equipment of this equipment is still according to the label forwarding message of this devices advertise before this, after then this equipment receives message, during with the label lookup ILM list item that carries in the message, can be because search less than this ILM list item and dropping packets.
Different characteristics in view of first kind FEC-label mapping mode and Second Type FEC-label mapping mode, in embodiments of the present invention, send record for all FEC-label mappings of in first timer, not removing undecided state, need to adopt the difference of FEC-label mapping mode to carry out different processing according to this equipment.
For this reason, need in advance for this equipment configuration FEC-label mapping mode, also be the FEC-label mapping mode that this equipment adopts.When this equipment adopts first kind FEC-label mapping mode, send record for after first timer is overtime, still being in pendent each FEC-label mapping, only need this FEC-label mapping of deletion to send record, do not send label forwarding list item corresponding to record and do not delete this FEC-label mapping, this mainly be because, under first kind FEC-label mapping mode, this equipment is same label for this FEC to the announcement of the opposite equip. of Different L DP session, therefore in this equipment, should have the same label forwarding-table item, arbitrary opposite equip. is sent the message that carries this label, can carry out message repeating according to this label forwarding list item, therefore there is no need to delete this label forwarding list item, and the FEC-label mapping sends record and is actually with LDP that session is associated, thereby needs deletion.When this equipment adopts Second Type FEC-label mapping mode, send record for after first timer is overtime, still being in pendent each FEC-label mapping, need this FEC-label mapping transmission record of deletion and this FEC-label mapping to send label forwarding list item corresponding to record.
For each FEC-label mapping receiving record of not removing undecided state, because the connecting link between this equipment and the opposite equip. is interrupted, if still E-Packet according to label forwarding list item corresponding to this FEC-label mapping receiving record, then message finally can be dropped, therefore, this equipment need to be deleted this FEC-label mapping receiving record, also need simultaneously label forwarding list item corresponding to this FEC-label mapping receiving record is updated to the label forwarding list item of transmitting along LSP for the termination message, this mainly be because, behind the LDP session DOWN, can't send according to this label forwarding list item the message of this FEC to opposite equip., if want normally to transmit the message of this FEC, the message that need at first terminate is transmitted along LSP, then according to routing table message is carried out three layers of forwarding, thereby need this label forwarding list item is updated to the label forwarding list item of transmitting along LSP for the termination message, and FEC-label mapping receiving record is actually with LDP that session is associated, thereby needs deletion.Like this, after this equipment receives the message of this FEC, no longer E-Packet according to original label forwarding list item, but the message label is ejected along the label forwarding list item that LSP transmits according to the termination message that is used for after upgrading first, then E-Packet according to routing table.LSR4 in Fig. 3 is as example, after the connecting link between LSR4 and the LSR2 interrupts causing LDP session DOWN, if the label mapping receiving record among the LSR4: FEC2-LabelB still is in undecided state, then LSR4 is when deletion FEC2-LabelB, label forwarding list item that also will FEC2-LabelB is corresponding is updated to respectively label forwarding list item shown in Fig. 4 a ' and Fig. 4 b ' from list item shown in Fig. 4 a and Fig. 4 b, thereby so that after LSR4 receives the message of FEC2, LSP according to the termination of list item shown in Fig. 4 a ' or Fig. 4 b ' message transmits first, E-Packets according to routing table again.
In the prior art, have no progeny in the connecting link between the equipment, can carry out route reruns, because the LSP of FEC is consistent with optimum route, therefore, for two neighbouring devices on the LSP of specific FEC, if the connecting link between these two neighbouring devices is interrupted, then the common way of upstream neighbor equipment in these two neighbouring devices is: the label forwarding list item that this FEC is corresponding is updated to the label forwarding list item of transmitting for the LSP of message along this FEC that terminate and recomputates route first, after the new down hop that calculates this FEC, will be updated to for the termination message label forwarding list item of this new jumping correspondence along the label forwarding list item of the LSP forwarding of this FEC again.For example, in Fig. 3, after the link down between LSR4 and the LSR2 causes LDP session DOWN, the label forwarding list item that LSR4 is can be first corresponding with FEC2 is updated to respectively label forwarding list item shown in Fig. 4 a ', Fig. 4 b ' from label forwarding list item shown in Fig. 4 a, Fig. 4 b, after calculative determination LSR3 is new down hop, label forwarding list item shown in Fig. 4 a ', Fig. 4 b ' can be updated to respectively Fig. 4 a ' ', Fig. 4 b ' '.
Yet, in above-mentioned the giving an example, the label forwarding list item that FEC2 is corresponding is from Fig. 4 a, label forwarding list item is updated to respectively Fig. 4 a ' shown in Fig. 4 b, label forwarding list item there is no need shown in Fig. 4 b ', this mainly be because: this renewals operation main purpose is that the LSP for the message that terminates transmits afterwards and E-Packets according to routing table, but, before new down hop is calculated, down hop remains LSR2, therefore transmit by routing table and still message can be sent to LSR2, and because the connecting link between LSR4 and the LSR2 is interrupted dropping packets, this is identical with the result who E-Packets according to label forwarding list item shown in Fig. 4 a or Fig. 4 b.
Upgrade the cpu resource waste that operation causes for fear of unnecessary label forwarding list item, in the embodiment of the invention shown in Figure 5, connecting link between this equipment and the opposite equip. interrupt causing and opposite equip. between the LDP conversation after, when each FEC-label mapping record that will send by described LDP session and that receive is labeled as undecided state, FEC under this FEC-label mapping receiving record can also be labeled as undecided state, and re-start route calculating:
If before first timer is overtime, calculate new down hop corresponding to arbitrary FEC that is in undecided state, then remove the undecided state of this FEC, and upgrade label forwarding list item corresponding to this FEC according to this new down hop, no longer carry out the operating procedure that the label forwarding list item that this FEC is corresponding is updated to the label forwarding list item of transmitting along LSP for the termination message; Specifically, upgrade label forwarding list item corresponding to this FEC according to this new down hop and comprise: the outgoing interface in this label forwarding list item is updated to outgoing interface corresponding to this new down hop, the down hop in this label forwarding list item is updated to this new down hop, the outgoing label in this label forwarding list item is updated to the label that enters that this new down hop is this FEC distribution.
If before first timer is overtime, fail to calculate new down hop corresponding to arbitrary FEC that is in undecided state, then delete label forwarding list item corresponding to this FEC.
In the embodiment of the invention shown in Figure 5, after the LDP conversation between this equipment and the opposite equip., carry out mark and timer is set by the FEC-label mapping record with the LDP session association, recovery situation by timer and LDP session, respective handling carried out in the FEC label mapping record of LDP session association and corresponding label forwarding list item, can effectively reduce cpu resource consumption, and the reduction that cpu resource consumes, the time that the FEC-label mapping of LDP session association can be recorded again corresponding label forwarding list item switching conversely shortens greatly, thereby the LSP convergence rate that has indirectly improved the affiliated FEC of FEC-label mapping record of LDP session association also can effectively reduce the flow interrupt time.
Referring to Fig. 6, Fig. 6 optimization method flow chart that to be the embodiment of the invention two upgrade based on the LSP of LDP, the method is applicable to the equipment room optimization that LSP upgrades when LDP control plane fault causes LDP session DOWN, mainly may further comprise the steps:
During LDP session between step 601, foundation and the opposite equip., announce the FEC-label mapping mode of this equipment to opposite equip. and receive the FEC-label mapping mode of opposite equip. announcement; Described FEC-label mapping mode comprises first kind FEC-label mapping mode and Second Type FEC-label mapping mode.
In the present embodiment, can utilize the initial words message of setting up the LDP session, newly-increased TLV in initial message with the FEC-label mapping mode that this TLV Portable device adopts, announces in the FEC-label mapping mode that realizes equipment.
Step 602, detect this equipment and opposite equip. when the hello of last adjacent body of LDP control plane keeps the keepalive of timer expiry or described LDP session to keep timer expiry to cause described LDP conversation, if the FEC-label mapping mode of opposite equip. is first kind FEC-label mapping mode, then will be labeled as undecided state by all FEC-label mapping records of described LDP session association and keep label forwarding list item corresponding to each FEC-label mapping record constant, start second timer.
LDP control plane fault mainly comprises following two kinds: a kind of is that the hello at last adjacent body of LDP control plane keeps timer expiry between the equipment, and another kind is that the keepalive of the LDP session between the equipment keeps timer expiry.These two kinds of LDP control plane faults all can cause the LDP conversation.
In the present embodiment, when causing the LDP conversation because of LDP control plane fault between this equipment and the opposite equip., need to judge first the FEC-label mapping mode that opposite equip. adopts, when opposite equip. adopts first kind FEC-label mapping mode, adopt the optimisation strategy identical with the embodiment of the invention shown in Figure 5: all FEC-label mapping records of described LDP session association are labeled as undecided state and keep label forwarding list item corresponding to each FEC-label mapping record constant, also need simultaneously to start a timer (second timer), second timer is used for the time span that label forwarding list item corresponding to each FEC-label mapping record of control remains unchanged.
Step 603, overtime in the second timer time before, if described LDP session recovers, then each the FEC-label mapping for described LDP session association sends record, remove the undecided state of this FEC-label mapping record and again send this FEC-label mapping to opposite equip., each FEC-label mapping record for described LDP session association, if receive this FEC-label mapping that opposite equip. resends, then remove the undecided state of this FEC-label mapping record.
In the embodiment of the invention, at second timer in the time, if the LDP session between this equipment and the opposite equip. recovers, then each the FEC-label mapping for the LDP session association sends record, this equipment need to be removed the undecided state of this FEC-label mapping and resend this FEC-label mapping to opposite equip., in order to recover the LSP of corresponding FEC; For each FEC-label mapping receiving record of LDP session association, if this equipment receives this FEC-label mapping that opposite equip. sends again, then can remove the undecided state of this FEC-label mapping record, in order to recover the LSP of corresponding FEC.
For arbitrary FEC-label mapping record of having removed undecided state, because the whole process of recovering from LDP session DOWN to the LDP session, the operation of only this FEC-label mapping record having been carried out mark and having been removed mark, and do not carry out deletion action, and label forwarding list item corresponding to this FEC-label mapping record also remains unchanged always, therefore, can effectively reduce the system CPU resource consumption.
Step 604, after second timer is overtime, all FEC-label mappings that undecided state is not removed in deletion send record, for each FEC-label mapping receiving record of not removing undecided state, delete this FEC-label mapping receiving record, and label forwarding list item corresponding to this FEC label mapping receiving record is updated to the label forwarding list item of transmitting along LSP for the termination message.
Described LDP session between this equipment and the opposite equip. is not in the situation of the super interior recovery of second timer, and the undecided state with all FEC-label mapping records that receive that send by described LDP session can not be eliminated; Even in the super interior recovery of second timer, also may existing, the described LDP session between this equipment and the opposite equip. fails to remove in the time at second timer the FEC-label mapping record of undecided state.
Send record for all FEC-label mappings of after second timer is overtime, not removing yet undecided state, because what determined the opposite equip. employing in step 602 is first kind FEC-label mapping mode, therefore, only need these FEC-label mappings of deletion to send record.For the FEC-label mapping receiving record of after second timer is overtime, not removing yet undecided state, this equipment need to be deleted these FEC-label mapping records, simultaneously, also need label forwarding list item corresponding to each FEC-label mapping record is updated to the label forwarding list item of transmitting along LSP for the termination message, so that the message of this FEC arrives after this equipment, not according to original label forwarding list item message to be sent to opposite equip., but E-Packet with the ejection of the label in the message and according to routing table.
In the embodiment of the invention shown in Figure 6, after the LDP conversation between this equipment and the opposite equip., carry out mark and timer is set by the FEC-label mapping record with the LDP session association, recovery situation by timer, routing update and LDP session, respective handling carried out in the FEC label mapping record of LDP session association and corresponding label forwarding list item, can effectively reduce cpu resource consumption on the one hand, on the other hand, also so that message still can access uninterrupted forwarding in the unusual situation of LDP control plane.
More than optimization method that embodiment of the invention LSP is upgraded have been described in detail, the optimization device that the present invention also provides a kind of LSP to upgrade is elaborated below in conjunction with Fig. 7.
Fig. 7 is the optimized device that upgrades based on the LSP of LDP that the embodiment of the invention provides, and as shown in Figure 7, this equipment comprises: detecting unit 701, control unit 702, Transmit-Receive Unit 703; Wherein,
Detecting unit 701 for detection of the state of the LDP session between this equipment and the opposite equip., and is judged the reason that causes described LDP session DOWN when detecting described LDP session DOWN;
Control unit 702, when detecting connecting link and interrupt causing LDP session DOWN between this equipment and the opposite equip. for detection of unit 701, all FEC-label mapping records of described LDP session association are labeled as undecided state and keep label forwarding list item corresponding to each FEC-label mapping record constant, start first timer; Described FEC-label mapping record comprises that the FEC-label mapping sends record and FEC-label mapping receiving record; Be used for before first timer is overtime, if detecting described LDP session, recovers detecting unit 701, then each the FEC-label mapping for described LDP session association sends record, removing this FEC-label mapping sends the undecided state of record and notifies Transmit-Receive Unit 703 again to send this FEC-label mapping to opposite equip., each FEC-label mapping receiving record for described LDP session association, if Transmit-Receive Unit 703 receives this FEC-label mapping that opposite equip. resends, then remove the undecided state of this FEC-label mapping receiving record; Be used for after first timer is overtime, all FEC-label mappings that undecided state is not removed in deletion send record, for each FEC-label mapping receiving record of not removing undecided state, delete this FEC-label mapping receiving record, and label forwarding list item corresponding to this FEC-label mapping receiving record is updated to the label forwarding list item of transmitting along LSP for the termination message;
Transmit-Receive Unit 703 is used for sending the FEC-label mapping according to the notice of control unit 702 to opposite equip.; Be used for receiving the FEC-label mapping that opposite equip. sends.
This equipment also comprises dispensing unit 704, is used for being in advance this equipment configuration FEC-label mapping mode, and described FEC-label mapping mode comprises first kind FEC-label mapping mode and Second Type FEC-label mapping mode; Wherein, during this equipment configuration first kind FEC-label mapping mode, for same FEC, announce same label to different opposite equip.s; During this equipment configuration Second Type FEC-label mapping mode, for same FEC, announce different labels to different opposite equip.s;
When described control unit 702 is not removed all FEC-label mappings transmission records of undecided state in deletion, judge further whether dispensing unit 704 is Second Type FEC-label mapping mode for the FEC-label mapping mode of this equipment configuration, if so, then delete each FEC-label mapping of not removing undecided state and send label forwarding list item corresponding to record.
This device also comprises route computing unit 705;
When described control unit 702 is labeled as undecided state at all the FEC-label mapping records with described LDP session association, further FEC under each FEC-label mapping receiving record of described LDP session association is labeled as undecided state;
Described route computing unit detects in the connecting link for detection of unit 701 and to have no progeny, and recomputates route;
Described control unit 702, before first timer is overtime, calculate new down hop corresponding to arbitrary FEC that is in undecided state if be used for route computing unit, undecided state and the label forwarding list item that this FEC is corresponding of then removing this FEC are updated to label forwarding list item corresponding to this new down hop, otherwise, delete label forwarding list item corresponding to this FEC.
This device also comprises session establishment unit 706, be used for setting up the LDP session between this equipment and the opposite equip., and during the LDP session between this equipment of foundation and opposite equip., announce to opposite equip. for the FEC-label mapping mode of this equipment configuration dispensing unit 704 and receive the FEC-label mapping mode of opposite equip. announcement;
Described control unit 702, be further used for detecting unit 701 and detect this equipment and opposite equip. when the hello of last adjacent body of LDP control plane keeps the keepalive of timer expiry or described LDP session to keep timer expiry to cause described LDP conversation, if the FEC-label mapping mode of opposite equip. announcement is first kind FEC-label mapping mode, then all the FEC-label mapping records with described LDP session association are labeled as undecided state and keep label forwarding list item corresponding to each FEC-label mapping record constant, start second timer; For before overtime in the second timer time, if described LDP session recovers, then each the FEC-label mapping for described LDP session association sends record, removing this FEC-label mapping sends the undecided state of record and notifies Transmit-Receive Unit 703 again to send this FEC-label mapping to opposite equip., each FEC-label mapping receiving record for described LDP session association, if Transmit-Receive Unit 703 receives this FEC-label mapping that opposite equip. resends, then remove the undecided state of this FEC-label mapping receiving record; Be used for after second timer is overtime, all FEC-label mappings that undecided state is not removed in deletion send record, for each FEC-label mapping receiving record of not removing undecided state, delete this FEC-label mapping receiving record, and label forwarding list item corresponding to this FEC label mapping receiving record is updated to the label forwarding list item of transmitting along LSP for the termination message.
In the said equipment,
Described control unit 702 is when being updated to label forwarding list item corresponding to this FEC-label mapping record the label forwarding list item of transmitting along LSP for the termination message, be used for: the tag operational of the ILM list item that this FEC-label mapping record is corresponding changes to pop from swap, and outgoing label changes to invalid; It is invalid that tag operational in the FTN list item that this FEC-label mapping record is corresponding changes to from push, and outgoing label changes to invalid.
The above is preferred embodiment of the present invention only, 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., all should be included within protection scope of the present invention.
Claims (10)
1. optimization method that upgrades based on the label switching path LSP of label advertizing protocol LDP is characterized in that the method comprises:
When detecting connecting link and interrupting causing LDP session DOWN between this equipment and the opposite equip., all FEC-label mapping records of described LDP session association are labeled as undecided state and keep label forwarding list item corresponding to each FEC-label mapping record constant, start first timer; Described FEC-label mapping record comprises that the FEC-label mapping sends record and FEC-label mapping receiving record;
Before first timer is overtime, if described LDP session recovers, then each the FEC-label mapping for described LDP session association sends record, removing this FEC-label mapping sends the undecided state of record and again sends this FEC-label mapping to opposite equip., each FEC-label mapping receiving record for described LDP session association, if receive this FEC-label mapping that opposite equip. resends, then remove the undecided state of this FEC-label mapping receiving record;
After first timer is overtime, all FEC-label mappings that undecided state is not removed in deletion send record, for each FEC-label mapping receiving record of not removing undecided state, delete this FEC-label mapping receiving record, and label forwarding list item corresponding to this FEC-label mapping receiving record is updated to the label forwarding list item of transmitting along LSP for the termination message.
2. method according to claim 1 is characterized in that,
Be in advance this equipment configuration FEC-label mapping mode, described FEC-label mapping mode comprises first kind FEC-label mapping mode and Second Type FEC-label mapping mode; Wherein, during this equipment configuration first kind FEC-label mapping mode, for same FEC, announce same label to different opposite equip.s; During this equipment configuration Second Type FEC-label mapping mode, for same FEC, announce different labels to different opposite equip.s;
All FEC-label mappings that undecided state is not removed in deletion send when recording, whether the FEC-label mapping mode of further judging the configuration of this equipment is Second Type FEC-label mapping mode, if so, then delete each FEC-label mapping of not removing undecided state and send label forwarding list item corresponding to record.
3. method according to claim 1 is characterized in that,
When all FEC-label mappings record of described LDP session association is labeled as undecided state, further FEC under each FEC-label mapping receiving record of described LDP session association is labeled as undecided state;
Detect after the connecting link interruption, further comprise: recomputate route, if this equipment calculates new down hop corresponding to arbitrary FEC that is in undecided state before first timer is overtime, then remove the undecided state of this FEC, and upgrade label forwarding list item corresponding to this FEC according to this new down hop, otherwise, delete label forwarding list item corresponding to this FEC.
4. method according to claim 2 is characterized in that, the method further comprises:
During described LDP session between this equipment of foundation and the opposite equip., announce the FEC-label mapping mode of this equipment to opposite equip. and receive the FEC-label mapping mode of opposite equip. announcement;
When this equipment of detecting and opposite equip. keep the keepalive of timer expiry or described LDP session to keep timer expiry to cause described LDP conversation at the hello of last adjacent body of LDP control plane, if the FEC-label mapping mode of opposite equip. announcement is first kind FEC-label mapping mode, then all the FEC-label mapping records with described LDP session association are labeled as undecided state and keep label forwarding list item corresponding to each FEC-label mapping record constant, start second timer;
Before overtime in the second timer time, if described LDP session recovers, then each the FEC-label mapping for described LDP session association sends record, removing this FEC-label mapping sends the undecided state of record and again sends this FEC-label mapping to opposite equip., each FEC-label mapping receiving record for described LDP session association, if receive this FEC-label mapping that opposite equip. resends, then remove the undecided state of this FEC-label mapping receiving record;
After second timer is overtime, all FEC-label mappings that undecided state is not removed in deletion send record, for each FEC-label mapping receiving record of not removing undecided state, delete this FEC-label mapping receiving record, and label forwarding list item corresponding to this FEC label mapping receiving record is updated to the label forwarding list item of transmitting along LSP for the termination message.
5. according to claim 1,2,3 or 4 described methods, it is characterized in that,
The method that label forwarding list item corresponding to this FEC-label mapping record is updated to the label forwarding list item of transmitting along LSP for the termination message is: the tag operational of the ILM list item that this FEC-label mapping record is corresponding changes to pop from swap, and outgoing label changes to invalid; It is invalid that tag operational in the FTN list item that this FEC-label mapping record is corresponding changes to from push, and outgoing label changes to invalid.
6. an optimized device that upgrades based on the label switching path LSP of label advertizing protocol LDP is characterized in that this equipment comprises: detecting unit, control unit, Transmit-Receive Unit;
Described detecting unit for detection of the state of the LDP session between this equipment and the opposite equip., and is judged the reason that causes described LDP session DOWN when detecting described LDP session DOWN;
Described control unit, when interrupting causing LDP session DOWN between this equipment and the opposite equip. for detection of unit inspection to connecting link, all FEC-label mapping records of described LDP session association are labeled as undecided state and keep label forwarding list item corresponding to each FEC-label mapping record constant, start first timer; Described FEC-label mapping record comprises that the FEC-label mapping sends record and FEC-label mapping receiving record; Be used for before first timer is overtime, if described LDP session recovers, then each the FEC-label mapping for described LDP session association sends record, removing this FEC-label mapping sends the undecided state of record and notifies Transmit-Receive Unit again to send this FEC-label mapping to opposite equip., each FEC-label mapping receiving record for described LDP session association, if Transmit-Receive Unit receives this FEC-label mapping that opposite equip. resends, then remove the undecided state of this FEC-label mapping receiving record; Be used for after first timer is overtime, all FEC-label mappings that undecided state is not removed in deletion send record, for each FEC-label mapping receiving record of not removing undecided state, delete this FEC-label mapping receiving record, and label forwarding list item corresponding to this FEC-label mapping receiving record is updated to the label forwarding list item of transmitting along LSP for the termination message;
Described Transmit-Receive Unit is used for sending the FEC-label mapping according to the notice of control unit to opposite equip.; Be used for receiving the FEC-label mapping that opposite equip. sends.
7. equipment according to claim 1 is characterized in that, this equipment also comprises dispensing unit;
Described dispensing unit is used for being in advance this equipment configuration FEC-label mapping mode, and described FEC-label mapping mode comprises first kind FEC-label mapping mode and Second Type FEC-label mapping mode; Wherein, during this equipment configuration first kind FEC-label mapping mode, for same FEC, announce same label to different opposite equip.s; During this equipment configuration Second Type FEC-label mapping mode, for same FEC, announce different labels to different opposite equip.s;
When described control unit is not removed all FEC-label mappings transmission records of undecided state in deletion, whether the FEC-label mapping mode of further judging the configuration of this equipment is Second Type FEC-label mapping mode, if so, then delete each FEC-label mapping of not removing undecided state and send label forwarding list item corresponding to record.
8. equipment according to claim 6 is characterized in that, this device also comprises route computing unit;
When described control unit is labeled as undecided state at all the FEC-label mapping records with described LDP session association, further FEC under each FEC-label mapping receiving record of described LDP session association is labeled as undecided state;
Described route computing unit is had no progeny in connecting link for detection of unit inspection, recomputates route;
Described control unit, before first timer is overtime, calculate new down hop corresponding to arbitrary FEC that is in undecided state if be used for route computing unit, then remove the undecided state of this FEC, and upgrade label forwarding list item corresponding to this FEC according to this new down hop, otherwise, delete label forwarding list item corresponding to this FEC.
9. equipment according to claim 7 is characterized in that, this device also comprises the session establishment unit;
Described session establishment unit when being used for setting up the LDP session between this equipment and the opposite equip., being announced the FEC-label mapping mode of this equipment to opposite equip. and is received the FEC-label mapping mode of opposite equip. announcement;
Described control unit, be further used for detecting unit and detect this equipment and opposite equip. when the hello of last adjacent body of LDP control plane keeps the keepalive of timer expiry or described LDP session to keep timer expiry to cause described LDP conversation, if the FEC-label mapping mode of opposite equip. announcement is first kind FEC-label mapping mode, then all the FEC-label mapping records with described LDP session association are labeled as undecided state and keep label forwarding list item corresponding to each FEC-label mapping record constant, start second timer; For before overtime in the second timer time, if described LDP session recovers, then each the FEC-label mapping for described LDP session association sends record, removing this FEC-label mapping sends the undecided state of record and notifies Transmit-Receive Unit again to send this FEC-label mapping to opposite equip., each FEC-label mapping receiving record for described LDP session association, if first unit receives this FEC-label mapping that opposite equip. resends, then remove the undecided state of this FEC-label mapping receiving record; Be used for after second timer is overtime, all FEC-label mappings that undecided state is not removed in deletion send record, for each FEC-label mapping receiving record of not removing undecided state, delete this FEC-label mapping receiving record, and label forwarding list item corresponding to this FEC label mapping receiving record is updated to the label forwarding list item of transmitting along LSP for the termination message.
10. according to claim 6,7,8 or 8 described equipment, it is characterized in that,
Described control unit is when being updated to label forwarding list item corresponding to this FEC-label mapping record the label forwarding list item of transmitting along LSP for the termination message, term: the tag operational in the ILM list item that this FEC-label mapping record is corresponding changes to pop from swap, and outgoing label changes to invalid; It is invalid that tag operational in the FTN list item that this FEC-label mapping record is corresponding changes to from push, and outgoing label changes to invalid.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103828311A (en) * | 2013-12-16 | 2014-05-28 | 华为技术有限公司 | Rerouting sequence programming method and system |
| CN106254245A (en) * | 2016-07-29 | 2016-12-21 | 杭州迪普科技有限公司 | A kind of method and device managing list item |
| WO2017041493A1 (en) * | 2015-09-07 | 2017-03-16 | 中兴通讯股份有限公司 | Mbb implementation method and device |
| CN106850247A (en) * | 2017-01-04 | 2017-06-13 | 安徽皖通邮电股份有限公司 | A kind of pseudo-wire control word upgrade method |
| CN107547386A (en) * | 2017-06-23 | 2018-01-05 | 新华三技术有限公司 | Message forwarding method and device |
| CN108243102A (en) * | 2016-12-27 | 2018-07-03 | 迈普通信技术股份有限公司 | A kind of implementation method of quick heavy-route and PE equipment |
| CN111683160A (en) * | 2020-04-01 | 2020-09-18 | 新华三信息安全技术有限公司 | MAC address recovery method and device |
| CN114697373A (en) * | 2020-12-30 | 2022-07-01 | 华为技术有限公司 | Method and system for session protection |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1503516A (en) * | 2002-11-27 | 2004-06-09 | 华为技术有限公司 | Method for realizing network to network interface connection synchronization and restoration |
| CN101087207A (en) * | 2006-06-09 | 2007-12-12 | 华为技术有限公司 | A processing method for multi-node communication failure |
| CN101917290A (en) * | 2010-08-12 | 2010-12-15 | 北京星网锐捷网络技术有限公司 | method, device and network equipment for processing label transmitting path fault as well as network equipment |
-
2013
- 2013-07-08 CN CN201310284848.7A patent/CN103354521B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1503516A (en) * | 2002-11-27 | 2004-06-09 | 华为技术有限公司 | Method for realizing network to network interface connection synchronization and restoration |
| CN101087207A (en) * | 2006-06-09 | 2007-12-12 | 华为技术有限公司 | A processing method for multi-node communication failure |
| CN101917290A (en) * | 2010-08-12 | 2010-12-15 | 北京星网锐捷网络技术有限公司 | method, device and network equipment for processing label transmitting path fault as well as network equipment |
Non-Patent Citations (1)
| Title |
|---|
| M.LEELANIVAS,Y.REKHTER ET AL: "Graceful Restart Mechanism for Label Distribution Protocol", 《RFC 3478》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103828311A (en) * | 2013-12-16 | 2014-05-28 | 华为技术有限公司 | Rerouting sequence programming method and system |
| CN103828311B (en) * | 2013-12-16 | 2016-09-28 | 华为技术有限公司 | A kind of heavy-route sequential program(me) method and system |
| US10015079B2 (en) | 2013-12-16 | 2018-07-03 | Huawei Technologies Co., Ltd. | Rerouting sequence planning method and system |
| WO2017041493A1 (en) * | 2015-09-07 | 2017-03-16 | 中兴通讯股份有限公司 | Mbb implementation method and device |
| CN106254245A (en) * | 2016-07-29 | 2016-12-21 | 杭州迪普科技有限公司 | A kind of method and device managing list item |
| CN108243102A (en) * | 2016-12-27 | 2018-07-03 | 迈普通信技术股份有限公司 | A kind of implementation method of quick heavy-route and PE equipment |
| CN108243102B (en) * | 2016-12-27 | 2022-03-11 | 迈普通信技术股份有限公司 | Method for realizing fast rerouting and PE equipment |
| CN106850247A (en) * | 2017-01-04 | 2017-06-13 | 安徽皖通邮电股份有限公司 | A kind of pseudo-wire control word upgrade method |
| CN107547386A (en) * | 2017-06-23 | 2018-01-05 | 新华三技术有限公司 | Message forwarding method and device |
| CN107547386B (en) * | 2017-06-23 | 2020-03-06 | 新华三技术有限公司 | Message forwarding method and device |
| CN111683160A (en) * | 2020-04-01 | 2020-09-18 | 新华三信息安全技术有限公司 | MAC address recovery method and device |
| CN111683160B (en) * | 2020-04-01 | 2022-07-12 | 新华三信息安全技术有限公司 | MAC address recovery method and device |
| CN114697373A (en) * | 2020-12-30 | 2022-07-01 | 华为技术有限公司 | Method and system for session protection |
| CN114697373B (en) * | 2020-12-30 | 2024-05-03 | 华为技术有限公司 | Method and system for session protection |
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