CN103442386B

CN103442386B - A kind of fault detection method and node device

Info

Publication number: CN103442386B
Application number: CN201310356513.1A
Authority: CN
Inventors: 刘翔
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-08-15
Filing date: 2013-08-15
Publication date: 2016-03-30
Anticipated expiration: 2033-08-15
Also published as: CN103442386A

Abstract

The invention discloses a kind of fault detection method and node device, main contents comprise: the tunnel only for creating between adjacent node is set up a vertical OAM and detected session, when detecting that the connection of these two adjacent nodes occurs abnormal, with all MPLS tunnels of described tunnel group binding abnormal with regard to these two adjacent nodes of direct confirmation approach, directly can notify the source node in MPLS tunnel, avoiding the process that node detects session for multiple OAM causes the event of notification source node to occur the problem postponed, and guarantees the realization of the fast quick-recovery of 50ms fault; Meanwhile, the OAM also greatly reducing foundation detects the quantity of session and OAM message, reaches and reduces the network bandwidth of transmission shared by OAM message, and the object that minimizing OAM message affects the equipment performance of node.

Description

A kind of fault detection method and node device

Technical field

The present invention relates to wireless communication technology field, particularly relate to a kind of fault detection method and node device.

Background technology

Along with the development of network technology, also more and more higher to the transmission requirement of mobile bearer network, when the one malfunctions in mobile bearer network or internodal link disconnect, think that mobile bearer network occurs abnormal, now, need disturbance switching operation be carried out.In order to ensure the abnormal less on the impact of communication service of mobile bearer network, disturbance switching operate the time taken and need be less than 50ms, and this realisticly will show quick fault testing.

For the base station controller PE1 shown in Fig. 1 respectively with the mobile retransmission business of two base station PE2 and PE3, PE1 and PE2 and and PE1 and PE3 between business datum by MPLS(Multi-ProtocolLabelSwitch, multiprotocol label switching) tunnel carries, therefore, communication link between PE1 and PE2, the fault detect of the communication link between PE1 and PE3, MPLSOAM(OperationAdministrationandMaintenance can be adopted, operation/management/safeguard), BFD(BidirectionalForwardingDetection, two-way converting detect) etc. detect separately for every bar MPLS tunnel, namely MPLSOAM is started for every bar MPLS tunnel, between arbitrary neighborhood two nodes of every bar MPLS tunnel institute approach, set up OAM detect session, realize the transmission of OAM message between these two nodes, the object of quick fault testing is reached with this.

Situation for shown in Fig. 1: establish two MPLS tunnels (can be referred to as MPLS_LSP_1 and MPLS_LSP_2) between PE1 and PE2, also establishes two MPLS tunnels (can be referred to as MPLS_LSP_3 and MPLS_LSP_4) between PE1 and PE3.For MPLS_LSP_1 tunnel, the source node in MPLS_LSP_1 tunnel is PE1, and destination node is PE2, approach node P1 and P2.

Whether there is exception in order to fast detecting goes out MPLS_LSP_1 tunnel, need to start MPLSOAM for MPLS_LSP_1 tunnel, between PE1 and PE2, set up OAM end to end detect session, and the OAM message of transmission can run through through all intermediate nodes of P1 and P2.In order to ensure the fast quick-recovery of 50ms fault when MPLS_LSP_1 tunnel is abnormal, the transmission cycle of this OAM message is 3.3ms.Suppose that PE1 does not receive the OAM message of PE2 transmission in setting duration (the transmission cycle 9.9ms as 3 OAM message), then PE1 judges that MPLS_LSP_1 tunnel occurs extremely, and trigger protection is switched automatically, guarantees the fault recovery in 50ms.

Whether occur that abnormal way is identical with the way for MPLS_LSP_1 tunnel for MPLS_LSP_2 tunnel, need to start MPLSOAM for MPLS_LSP_2 tunnel, between PE1 and PE2, OAM sets up OAM and detects session, and OAM message can run through equally through all intermediate nodes of P1 and P2.

Whether occur that abnormal way is similar to the way for MPLS_LSP_1 tunnel for MPLS_LSP_3 tunnel and MPLS_LSP_4 tunnel, need between PE1 and PE3, to set up OAM for MPLS_LSP_3 tunnel and MPLS_LSP_4 tunnel respectively and detect session, OAM message can run through through all intermediate nodes of P1 and P2.

Shown in Fig. 1 based in the end-to-end fast detecting scheme in MPLS tunnel, MPLSOAM is started respectively for 4 MPLS tunnels, in figure above 4 physical links OAM detect session add up to 12, wherein: respectively for MPLS_LSP_1 between PE1 and P1, MPLS_LSP_2, there are 4 OAM and detect session in MPLS_LSP_3 and MPLS_LSP_4, respectively for MPLS_LSP_1 between P1 and P2, MPLS_LSP_2, there are 4 OAM and detect session in MPLS_LSP_3 and MPLS_LSP_4, there are 2 OAM for MPLS_LSP_1 and MPLS_LSP_2 respectively between P2 and PE2 and detect session, there are 2 OAM for MPLS_LSP_3 and MPLS_LSP_4 respectively between P2 and PE3 and detect session.

In such scheme, owing to starting MPLSOAM for each MPLS tunnel, each OAM detects all nodes that session runs through MPLS tunnel approach, therefore, the node of each MPLS tunnel approach needs to process a large amount of OAM message, equipment performance pressure is large, stabilization of equipment performance is caused to reduce, when there being a large amount of tunnel to break down simultaneously, end-node needs to process a large amount of OAM abnormality simultaneously and triggers switches, whole process may take one relatively long period, causes the fast quick-recovery of 50ms fault to be affected.

In addition, in such scheme, when the MPLS tunnel created constantly increases, when particularly the magnanimity of base station is disposed and is brought a large amount of MPLS tunnels, the quantity that OAM detects session is increased sharply, cause the data volume of OAM message also to roll up, Internet resources are occupied in a large number by OAM message, and the bandwidth that real mobile service can be used reduces; Meanwhile, the OAM between node detects the CPU protection state machine that session needs associated nodes, and a large amount of OAM detects conversation procedure will have a strong impact on joint behavior.

Summary of the invention

Embodiments provide a kind of fault detection method and node device, longer and take the network bandwidth and the too much problem of device resource in order to solve the failure detection time existed in prior art.

First aspect, provides a kind of fault detection method, and described method comprises:

First node creates tunnel group for the Section Point adjacent with self, described in described tunnel group and approach, the multiprotocol label switching MPLS tunnel of first node and described Section Point has binding relationship, and described MPLS tunnel is carried on the physical link between described first node and described Section Point;

Set up an OAM between described first node and described Section Point and detect session, described OAM detects session for described physical link, and judges whether the OAM message belonging to described OAM detection session receiving the transmission of described Section Point in the first setting duration;

When described first node does not receive the described OAM message of described Section Point transmission in described first setting duration, from with the MPLS tunnel of described tunnel group binding select at least one MPLS tunnel, and for the MPLS tunnel that every bar is selected, the source node to described MPLS tunnel sends the tunnel failure notification packet carrying the Tunnel Identifier in described MPLS tunnel.

In conjunction with first aspect, under the implementation that the first is possible, described method also comprises:

When described first node receives the described OAM message that described Section Point sends in described first setting duration, to determine and connection between described Section Point is in normal condition, otherwise, to determine and connection between described Section Point is in abnormal state.

In conjunction with the first possible implementation of first aspect or first aspect, under the implementation that the second is possible, described in described tunnel group and all approach, the MPLS tunnel of first node and described Section Point has binding relationship, or has binding relationship with the MPLS tunnel of first node described in part approach and described Section Point.

In conjunction with first aspect, under the implementation that the third is possible, described first node from the MPLS tunnel of described tunnel group binding select at least one MPLS tunnel, specifically comprise:

Described first node selects all MPLS tunnels with the group binding of described tunnel; Or

Described first node from the MPLS tunnel of described tunnel group binding select N bar MPLS tunnel, the priority in described N bar MPLS tunnel is higher than the priority in all the other MPLS tunnels in described tunnel group, and described N is positive integer.

The implementation possible in conjunction with the second of the first possible implementation of first aspect, first aspect, first aspect or the third possible implementation of first aspect, under the 4th kind of possible implementation, described first node is to after the source node in the MPLS tunnel selected sends tunnel failure notification packet, and described method also comprises:

When described first node receives the OAM message of described Section Point transmission in the second setting duration, for the MPLS tunnel that every bar is selected, the source node to described MPLS tunnel sends the tunnel failure carrying the Tunnel Identifier in described MPLS tunnel and removes message.

The implementation possible in conjunction with the second of the first possible implementation of first aspect, first aspect, first aspect or the third possible implementation of first aspect, under the 5th kind of possible implementation, described OAM message and described tunnel failure notification packet are APS APS message or the two-way converting detection BFD message of expansion;

When described OAM message is the APS message of expansion, fill in the field of expansion OAM belonging to this OAM message detect session for the mark of tunnel group;

When described tunnel failure notification packet is the APS message of expansion, fills in the field of expansion and produce fault and the status indicator noticed, and fill the Tunnel Identifier in this MPLS tunnel.

Second aspect, provides a kind of first node equipment, and described first node equipment comprises:

Tunnel group creation module, for creating tunnel group for the Section Point equipment adjacent with self, the multiprotocol label switching MPLS tunnel of described tunnel group and approach self and described Section Point equipment has binding relationship, and described MPLS tunnel is carried on the physical link between self and described Section Point;

Session establishment module, detects session for setting up an OAM with described Section Point equipment room, and described OAM detects session for described physical link;

Receiver module, for receiving the OAM message that described Section Point equipment sends, described OAM message belongs to described OAM and detects session;

Judge module, for judging whether the described OAM message receiving the transmission of described Section Point equipment in the first setting duration;

Select module, for being when not receiving described OAM message that described Section Point equipment sends in described first setting duration in the judged result of described judge module, from the MPLS tunnel of described tunnel group binding select at least one MPLS tunnel;

Message sending module, for the every bar MPLS tunnel for described selection model choice, the source node to described MPLS tunnel sends the tunnel failure notification packet carrying the Tunnel Identifier in described MPLS tunnel.

In conjunction with second aspect, under the implementation that the first is possible, described judge module, during specifically for receiving the described OAM message of described Section Point equipment transmission in described first setting duration, determines to be in normal condition with the connection of described Section Point equipment room; Otherwise, determine to be in abnormal state with the connection of described Section Point equipment room.

In conjunction with the first possible implementation of second aspect or second aspect, under the implementation that the second is possible, the MPLS tunnel of the tunnel group that described tunnel group creation module creates and all approach self and described Section Point equipment has binding relationship, or has binding relationship with the MPLS tunnel of part approach self and described Section Point equipment.

In conjunction with second aspect, under the implementation that the third is possible, described selection module, specifically for selecting all MPLS tunnels with the group binding of described tunnel, or from the MPLS tunnel of described tunnel group binding select N bar MPLS tunnel, the priority in described N bar MPLS tunnel is higher than the priority in all the other MPLS tunnels in described tunnel group, and described N is positive integer.

In conjunction with second aspect, the first possible implementation of second aspect, the third possible implementation of the implementation that the second of second aspect is possible or second aspect, under the 4th kind of possible implementation, described message sending module, also for after sending described tunnel failure notification packet to the source node in the MPLS tunnel selected, when described receiver module receives the OAM message of described Section Point equipment transmission at the second setting duration, for the MPLS tunnel that every bar is selected, source node to described MPLS tunnel sends the tunnel failure carrying the Tunnel Identifier in described MPLS tunnel and removes message.

The third aspect, provides a kind of first node equipment, comprising: bus, and is connected to processor and the interface of bus, wherein:

Described processor, tunnel group is created for the Section Point equipment adjacent with first node equipment, the MPLS tunnel of described tunnel group and approach first node equipment and described Section Point equipment has binding relationship, and set up an OAM with described Section Point equipment room and detect session, described MPLS tunnel is carried on the physical link between first node equipment and described Section Point, and described OAM detects session for described physical link;

Described processor, also for judging whether described interface receives the OAM message of described Section Point equipment transmission in the first setting duration, and described OAM message belongs to described OAM and detects session;

Described processor, also for being when not receiving OAM message that described Section Point equipment sends in described first setting duration in judged result, from the MPLS tunnel of described tunnel group binding select at least one MPLS tunnel, trigger described interface;

Described interface, for receiving the OAM message that described Section Point equipment sends, and when being subject to the triggering of described processor, for every bar MPLS tunnel of described processor selection, the source node to described MPLS tunnel sends the tunnel failure notification packet carrying the Tunnel Identifier in described MPLS tunnel.

In conjunction with the third aspect, under the implementation that the first is possible, described processor, specifically for when determining that described interface receives the OAM message of described Section Point equipment transmission in described first duration, determine to be in normal condition with the connection of described Section Point equipment room according to the transmitting side marking wherein comprised, otherwise, determine to be in abnormal state with the connection of described Section Point equipment room.

In conjunction with the first possible implementation of the third aspect or the third aspect, under the implementation that the second is possible, the tunnel group that described processor creates can have binding relationship with the MPLS tunnel of all approach self and described Section Point equipment, or has binding relationship with the MPLS tunnel of part approach self and described Section Point equipment.

In conjunction with the third aspect, under the implementation that the third is possible, described processor, specifically for selecting all MPLS tunnels with the group binding of described tunnel, or from the MPLS tunnel of described tunnel group binding select N bar MPLS tunnel, the priority in described N bar MPLS tunnel is higher than the priority in all the other MPLS tunnels in described tunnel group, and described N is positive integer.

In conjunction with the third aspect, the first possible implementation of the third aspect, the third possible implementation of the implementation that the second of the third aspect is possible or the third aspect, under the 4th kind of possible implementation, described interface, after also sending tunnel failure notification packet for the source node in the MPLS tunnel to processor selection, when receiving the OAM message that described Section Point equipment sends in the second setting duration, for the MPLS tunnel that every bar is selected, source node to described MPLS tunnel sends the tunnel failure carrying the Tunnel Identifier in described MPLS tunnel and removes message.

By the scheme of the embodiment of the present invention, only set up a vertical OAM for the Tunnel-Group created between adjacent node and detect session, when detecting that the connection of these two adjacent nodes occurs abnormal, with all MPLS tunnels of described Tunnel-Group group binding abnormal with regard to these two adjacent nodes of direct confirmation approach, directly can notify the source node in MPLS tunnel, avoiding the process that node detects session for multiple OAM causes the event of notification source node to occur the problem postponed, and guarantees the realization of the fast quick-recovery of 50ms fault; Meanwhile, the OAM also greatly reducing foundation detects the quantity of session and OAM message, reaches and reduces the network bandwidth of transmission shared by OAM message, and the object that minimizing OAM message affects the equipment performance of node.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the MPLS tunnel of PE1 respectively and between PE2 and PE3 and the schematic diagram of OAM detection session in background technology;

Fig. 2 is the schematic flow sheet of fault detection method in the embodiment of the present invention one;

Fig. 3 is the MPLS tunnel of PE1 respectively and between PE2 and PE3 and the schematic diagram of OAM detection session in the embodiment of the present invention two;

Fig. 4 is the structural representation of the embodiment of the present invention three interior joint equipment;

Fig. 5 is the structural representation of the embodiment of the present invention four interior joint equipment.

Embodiment

In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.

The node of indication in the embodiment of the present invention, refers to the network equipment supporting MPLS tunnel, such as router, switch etc.

The embodiment of the present invention does not start MPLSOAM for each MPLS tunnel, between arbitrary neighborhood two nodes of every bar MPLS tunnel approach, do not carry out OAM detect session yet, but for the first node (can be any node in topological structure) in network topology architecture, by first node in establishment tunnel, this locality group (follow-up represent with Tunnel-Group group), this Tunnel-Group group is only effective between first node and the node (as Section Point) adjacent with first node, and by many MPLS tunnel binding by way of first node and Section Point to Tunnel-Group group, and be that described Tunnel-Group group sets up an OAM detection session between first node and Section Point, it is for the physical link between described first node and described Section Point that the OAM of described foundation detects session, and described MPLS tunnel is also carried on described physical link.Now, even if having many by way of the MPLS tunnel of described first node and described Section Point, when an OAM detection session between described first node and described Section Point just can detect whether the connection between described first node and described Section Point occurs abnormal.When described first node according to the OAM between described Section Point detect session determine to be connected there is exception time, can assert and occur extremely with the MPLS tunnel of Tunnel-Group group binding, therefore, described first node can send the tunnel failure notification packet of the Tunnel Identifier carrying the MPLS tunnel broken down directly at least one and the source node in the MPLS tunnel of described Tunnel-Group group binding, source node is known, and the MPLS tunnel that described Tunnel Identifier is corresponding breaks down, so that source node carries out disturbance switching as early as possible, guarantee the fault recovery in 50ms.

The scheme of the embodiment of the present invention is relative to the scheme of prior art, no matter the quantity in the MPLS tunnel of approach two adjacent nodes has how many, only set up a vertical OAM for the Tunnel-Group created between these two adjacent nodes and detect session, when detecting that the connection of these two adjacent nodes occurs abnormal, with all MPLS tunnels of described Tunnel-Group group binding abnormal with regard to these two adjacent nodes of direct confirmation approach, directly can notify the source node in MPLS tunnel, avoiding the process that node detects session for multiple OAM causes the event of notification source node to occur postponing, farthest improve fault detect, the response speed of notice, guarantee the realization of the fast quick-recovery of 50ms fault, simultaneously, the scheme of the embodiment of the present invention also can greatly reduce the quantity of the OAM detection session of foundation, when particularly there is the MPLS tunnel of magnanimity, the effect reducing OAM detection session and minimizing OAM message in the embodiment of the present invention is just more obvious, effectively can reduce the network bandwidth of transmission shared by OAM message, and OAM message is on the impact of the equipment performance of node.In addition, when confirm by way of these two adjacent nodes and abnormal with all MPLS tunnels of described Tunnel-Group group binding time, the source node in the part MPLS tunnel can be concerned about to first node sends tunnel failure notification packet, and the source node in all MPLS tunnels need not be notified, add flexibility.

It should be noted that, in the scheme of the embodiment of the present invention, any node in network topology architecture can be connected with multiple other adjacent nodes simultaneously, any node can create Tunnel-Group group respectively for each other adjacent node, each Tunnel-Group group of establishment only to this node and other nodes adjacent with creating this Tunnel-Group group effective.Such as: node 1 is connected with node 3 with node 2 respectively, then node 1 can create two Tunnel-Group groups, wherein, Tunnel-Group group 1 pair of node 1 and node 2 effectively (record in node 1 mark of Tunnel-Group group 1 and node 2 identify between mapping relations), Tunnel-Group group 2 pairs of nodes 1 and node 3 effective (record in node 1 mark of Tunnel-Group group 2 and node 3 identify between mapping relations).

Because the connection between node need by the physical interface on node, therefore, the process of above-mentioned establishment Tunnel-Group group also can be considered: node creates Tunnel-Group group according to each physical interface used, and other nodes that the Tunnel-Group group of establishment is only connected with corresponding physical interface with this node are effective.Such as: node 1 is connected with node 3 with node 2 with physical interface 2 respectively by the physical interface 1 of this locality, then node 1 can create Tunnel-Group group 1 for physical interface 1, to node 1 and node 2 effective; Node 1 also can create Tunnel-Group group 2 for physical interface 2, to node 1 and node 3 effective.

Below by specific embodiment, the solution of the present invention is described in detail, but the solution of the present invention is not limited to following examples.

Embodiment one:

As shown in Figure 2, be the schematic flow sheet of fault detection method in the embodiment of the present invention one, said method comprising the steps of:

Step 101: first node creates Tunnel-Group group for the Section Point adjacent with self.

Described first node can be any node in network topology architecture, such as: first node can be source node in MPLS tunnel or destination node, also can be a certain via node of MPLS approach, the embodiment of the present invention limit the position of first node in network topology architecture.

First node creates Tunnel-Group group in this locality for Section Point, and the mark of the Tunnel-Group group of establishment and Section Point identified set up mapping relations so that first node identify according to described mapping relations the Tunnel-Group group of establishment for Section Point; Similarly, Section Point also can create Tunnel-Group group in this locality for first node, and the mark of the Tunnel-Group group of establishment and first node identified set up mapping relations so that Section Point identify according to described mapping relations the Tunnel-Group group of establishment for first node.

In fact, each node in network topology architecture can create Tunnel-Group group according to the mode of step 101 in this locality, here " first ", " second ", just for the adjacent node of two in diffServ network topological structure, does not have physical meaning.

Step 102: first node founds binding relationship by setting up with described Tunnel-Group by way of the MPLS tunnel of self and described Section Point.

Be carried on the physical link between described first node and described Section Point by way of the MPLS tunnel of described first node and described Section Point.

In this step 102, first node can in local maintenance list, record in described list:

The mark of the Tunnel-Group group created, for identifying the Tunnel-Group group of establishment;

The mark of the Tunnel-Group group created and for the mapping relations of mark of Section Point, for identify this Tunnel-Group group for adjacent node;

The binding relationship of the mark of the Tunnel-Group group created and the mark by way of self MPLS tunnel with described Section Point, for identifying the MPLS tunnel of this Tunnel-Group group binding.

In network topology architecture, the mark in MPLS tunnel and the information (as IP address) of source node and destination node is all have recorded in each node of MPLS tunnel approach, therefore, in this step 102, first node according to the relevant information in the MPLS tunnel of local record, can record the binding relationship of the mark of Tunnel-Group group and the mark in MPLS tunnel in the list.

Alternatively, first node all can set up vertical binding relationship by by way of self and all MPLS tunnels of described Section Point with described Tunnel-Group, also part MPLS tunnel and described Tunnel-Group can be set up vertical binding relationship.First node the parameter preset according to this locality can determine the quantity setting up the MPLS tunnel founding binding relationship with described Tunnel-Group.

Detecting session to farthest reduce OAM, in the present embodiment one, all MPLS tunnels by way of described first node and described Section Point all can be set up vertical binding relationship with described Tunnel-Group.

Except the binding relationship that the parameter preset according to this locality by first node sets up described Tunnel-Group group and MPLS tunnel, the mark that the embodiment of the present invention is also not limited to the mark and described Tunnel-Group group of manually adding certain one or more MPLS tunnel sets up binding relationship, specific implementation includes but not limited to: find out the mark of Tunnel-Group group need adding binding relationship in the list of first node local maintenance after, the mark in the MPLS tunnel that write is bound with the mark of this Tunnel-Group group in described list.

Step 103: set up a vertical OAM for the Tunnel-Group created between first node and described Section Point and detect session.

It is for the physical link between described first node and described Section Point that the described OAM set up detects session.

In the scheme of this step 103, the OAM that creates between first node and Section Point detects session for detecting approach first node and Section Point and whether occurring exception with each bar MPLS tunnel of described Tunnel-Group group binding.

Mutually OAM message be can transmit according to certain transmission cycle (as 3.3ms) between first node and Section Point, and in described OAM message, transmitting side marking and recipient's mark carried.When first node receives the OAM message of Section Point transmission, can to determine and connection between Section Point is in normal condition, in like manner, when Section Point receives the OAM message that first node sends, also can to determine and connection between first node is in normal condition.

Step 104: first node judges whether the OAM message receiving Section Point transmission in the first setting duration, if not, performs step 105.

Described OAM message belongs to the OAM set up between described first node and described Section Point and detects session.

Described setting duration is connected whether occur abnormal critical duration for reflecting between first node with Section Point, when first node can receive the OAM message of Section Point transmission in setting duration, represent that the connection between first node and Section Point does not occur exception; Otherwise, represent that the connection between first node and Section Point occurs abnormal.

When being connected appearance exception when between first node with Section Point, all MPLS tunnels of approach first node and Section Point must be affected, therefore, in order to ensure the fault recovery in 50ms, described setting duration should not set long, when transmitting OAM message according to the transmission cycle of 3.3ms between described first node and described Section Point, optional setting duration is 9.9ms, and namely 3 are transmitted the cycle.

Step 105: described first node from the MPLS tunnel of described Tunnel-Group group binding select at least one MPLS tunnel.

Step 106: the MPLS tunnel that first node is selected for every bar, the source node to described MPLS tunnel sends the tunnel failure notification packet carrying the Tunnel Identifier in described MPLS tunnel.

In the scheme of the present embodiment, when connection between first node and Section Point is abnormal, all MPLS tunnels of approach first node and Section Point all can be affected, therefore, first node can select the MPLS tunnel of all and described Tunnel-Group group binding, for every bar MPLS tunnel, source node respectively to described MPLS tunnel sends the tunnel failure notification packet carrying the Tunnel Identifier in described MPLS tunnel, make the source node in occurred abnormal MPLS tunnel when receiving the tunnel failure notification packet that first node sends, disturbance switching operation is carried out after can determining to occur abnormal MPLS tunnel according to Tunnel Identifier.

Such as, the MPLS tunnel of a certain Tunnel-Group group binding is MPLS_LSP_1 and MPLS_LSP_2, when determining that MPLS_LSP_1 and MPLS_LSP_2 is fault tunnel, tunnel failure notification packet can be sent to the source node of MPLS_LSP_1, carry the Tunnel Identifier of MPLS_LSP_1 wherein, source node to MPLS_LSP_2 sends tunnel failure notification packet, carries the Tunnel Identifier of MPLS_LSP_2 wherein.

Consider that approach first node is different with the priority in the MPLS tunnel of Section Point, first node can according to the priority in MPLS tunnel, from with the MPLS tunnel of described Tunnel-Group group binding select N(positive integer) bar MPLS tunnel (priority in described N bar MPLS tunnel is higher than the priority in all the other MPLS tunnels in described tunnel group), and for the MPLS tunnel that every bar is selected, source node to this MPLS tunnel sends the tunnel failure notification packet carrying the Tunnel Identifier in this MPLS tunnel, the source node in the MPLS tunnel making priority high is when receiving the tunnel failure notification packet that first node sends, disturbance switching operation is carried out after can determining to occur abnormal MPLS tunnel according to Tunnel Identifier.

When this step 106 is finished, complete the fault detect in the present embodiment one, notification procedure, more preferably, first node can also continue to detect the OAM message whether receiving Section Point and send, when first node receives the OAM message of Section Point transmission in the second setting duration, represent that the connection abnormal conditions between first node and Section Point are got rid of, now, first node can again send tunnel failure and remove message to the source node sending tunnel failure notification packet, for same source node, the Tunnel Identifier in MPLS tunnel carried in the tunnel failure notification packet sent is identical with the Tunnel Identifier that the tunnel failure of transmission removes the MPLS tunnel carried in message, represent that the MPLS tunnel being originally in abnormality has recovered normal, MPLS tunnel can be switched on original link by source node again.

Below for the network topology architecture figure shown in Fig. 3, the scheme of the embodiment of the present invention one is described in detail.

Embodiment two:

Following hypothesis is done for network topology architecture as shown in Figure 3:

Establish two MPLS tunnels (MPLS_LSP_1 and MPLS_LSP_2) between PE1 and PE2, also establish two MPLS tunnels (MPLS_LSP_3 and MPLS_LSP_4) between PE1 and PE3, P1 and P2 is the via node in these 4 MPLS tunnels.

PE1 creates Tunnel-Group-A group for P1, and this Tunnel-Group-A group and MPLS_LSP_1, MPLS_LSP_2, MPLS_LSP_3 and MPLS_LSP_4 bind, and sets up an OAM and detect session A between PE1 and P1.

P1 creates Tunnel-Group-A group for PE1, and this Tunnel-Group-A group and MPLS_LSP_1, MPLS_LSP_2, MPLS_LSP_3 and MPLS_LSP_4 bind, and sets up an OAM and detect session A between P1 and PE1; P1 also creates Tunnel-Group-B group for P2, and this Tunnel-Group-B group and MPLS_LSP_1, MPLS_LSP_2, MPLS_LSP_3 and MPLS_LSP_4 bind, and sets up an OAM and detect session B between P1 and P2.In fact, the mark of the Tunnel-Group group that P1 creates for PE1 is not necessarily identical with the mark of the Tunnel-Group group that PE1 creates for P1, here in order to represent the Tunnel-Group group of pairing and adopt the mark of identical Tunnel-Group group.

P2 creates Tunnel-Group-B group for P1, and this Tunnel-Group-B group and MPLS_LSP_1, MPLS_LSP_2, MPLS_LSP_3 and MPLS_LSP_4 bind, and sets up an OAM and detect session B between P2 and P1; P2 also creates Tunnel-Group-C group for PE2, and this Tunnel-Group-C group and MPLS_LSP_1 and MPLS_LSP_2 bind, and sets up an OAM and detect session C between P2 and PE2; P2 also creates Tunnel-Group-D group for PE3, and this Tunnel-Group-D group and MPLS_LSP_3 and MPLS_LSP_4 bind, and sets up an OAM and detect session D between P2 and PE3.

PE2 creates Tunnel-Group-C group for P2, and this Tunnel-Group-C group and MPLS_LSP_1 and MPLS_LSP_2 bind, and sets up an OAM and detect session C between PE2 and P2.

PE3 creates Tunnel-Group-D group for P2, and this Tunnel-Group-D group and MPLS_LSP_3 and MPLS_LSP_4 bind, and sets up an OAM and detect session D between PE3 and P2.

Based on the above-mentioned hypothesis to the network topology architecture shown in Fig. 3, P2 periodically carries out OAM with P1, PE2 and PE3 and detects session, and for the fault detect between P2 and PE2, detailed process is:

The first step: periodically carry out OAM with PE2 with P2 and detect session C.

The Tunnel-Group group of P2 and PE2 establishment like-identified can form neighbours and detect relation, periodically sends OAM message to the other side between P2 and PE2.The APS(APS that the encapsulation format easily extensible of the OAM message in the present embodiment is current; AutomaticProtectionSwitching) encapsulation format of message, fill in the field of expansion OAM belonging to this OAM message detect session for the mark of tunnel group.

For Y.1731, the encapsulation format of the OAM message that PE2 sends to P2 can be the form shown in table 1:

Table 1

Wherein: label value is 15, represent that this OAM message is the OAM message of single-hop;

OpCode is 1, represents that this OAM message is connectivity testing message;

Flages field fills the transmission cycle of this OAM message, and concrete filling form is as shown in table 2, and the content representation form of filling is as shown in table 3:

Table 2

Cycle [3:1]	Periodic quantity	Explanation
			000	Invalid value	Invalid value
001	3.33ms	300 frames per second
			010	10ms	100 frames per second
011	100ms	10 frames per second
			100	1s	1 frame per second
101	10s	6 frames per minute
			110	1min	1 frame per minute
111	10min	6 frames per hour

Table 3

TunnelGroupID field fill OAM belonging to this OAM message detect session for the mark of Tunnel-Group group, the content of filling here is the mark of Tunnel-Group-C group;

SourceIPAddress field fills the transmit leg IP address of this OAM message, and the content of filling here is the IP address of PE2 node;

DestinationIPAddress field fills the recipient IP address of this OAM message, and the content of filling here is the IP address of P2 node;

Other fields can with reference to the definition of RFC5586.

The encapsulation format of the OAM message that P2 sends to PE2 and the encapsulation format of above-mentioned message similar.

The present embodiment two is also not limited to above-mentioned encapsulation format, also can adopt the encapsulation format of such as BFD.

Second step: P2 judges whether to receive on the port be connected with PE2 within 3 cycles the OAM message that PE2 sends, if do not receive, then performs the 3rd step; If receive, then continue to carry out conventional OAM with PE2 and detect session.

3rd step: P2 determines that the connection between PE2 is abnormal, determines the MPLS tunnel of the Tunnel-Group-C group binding for PE2 created with this locality immediately.

In this step, the MPLS tunnel that P2 determines is MPLS_LSP_1 and MPLS_LSP_2.

4th step: P2 selects at least one tunnel from the MPLS tunnel determined, that suppose that P2 in this step selects is MPLS_LSP_1.

5th step: P2 sends tunnel failure notification packet with certain cycle to the source node of MPLS_LSP_1.

In this step, P2 can 3.3ms be the cycle, sends n (as 6) tunnel failure notification packet to PE1.

The encapsulation format of the encapsulation format of the described tunnel failure notification packet also APS message that easily extensible is current, fills and produces fault and the status indicator noticed, and fill the Tunnel Identifier in this MPLS tunnel in the field of expansion.

Still for Y.1731, the encapsulation format of described tunnel failure notification packet is as shown in table 4:

Table 4

Wherein: the content of filling in IP stem is: object IP address, what fill here is the IP address of PE1, source IP address, and what fill here is the IP address of P2;

The content of filling in OpCode field is 39, represents that tunnel failure notification packet is that APS protects protocol massages;

The content of filling in request/mode field is: when producing fault and when noticing, filling " 1100 ", represent " current tunnel Signal Fail "; When after fault clearance, should fill " 0000 ", represent " fault is removed, without request "; Herein, when filling the status indicator 1100 that generation fault is also noticed, tunnel failure notification packet during the message that expression sends, when the status indicator 0000 that Tianchong fault has been removed, the message of expression transmission is that tunnel failure removes message.

TunnelID field fills the mark occurring abnormal MPLS tunnel, and what fill here is the mark of MPLS_LSP_1;

The source address in what TunnelSourceAddress field was filled is abnormal MPLS tunnel, what fill here is the address of PE1, and the content of this field is optional;

The destination address in what TunnelDestinationAddress field was filled is abnormal MPLS tunnel, what fill here is the address of PE2, and the content of this field is optional.

After 6th step: PE1 receives described tunnel failure notification packet, according to the mark of MPLS_LSP_1 wherein, determine that MPLS_LSP_1 occurs abnormal, disturbance switching operation will be performed at once, the quick protection of business between realization and PE2.

Embodiment three:

The embodiment of the present invention three describes a kind of node device belonged to embodiment one and embodiment two under same inventive concept, and for distinguishing in other adjacent node devices, the node device in the present embodiment three can be referred to as first node equipment.

As shown in Figure 4, described first node equipment comprises tunnel group creation module 11, session establishment module 12, receiver module 13, judge module 14, selects module 15 and message sending module 16, wherein:

Tunnel group creation module 11 is for creating tunnel group for the Section Point equipment adjacent with self, the multiprotocol label switching MPLS tunnel of described tunnel group and approach self and described Section Point equipment has binding relationship, and described MPLS tunnel is carried on the physical link between self and described Section Point;

Session establishment module 12 detects session for setting up an OAM with described Section Point equipment room, and described OAM detects session for described physical link;

The OAM message that receiver module 13 sends for receiving described Section Point equipment, described OAM message belongs to described OAM and detects session;

Judge module 14 is for judging whether the described OAM message receiving the transmission of described Section Point equipment in the first setting duration;

Select module 15 for being when not receiving described OAM message that described Section Point equipment sends in described first setting duration in the judged result of described judge module 14, from the MPLS tunnel of described tunnel group binding select at least one MPLS tunnel;

The every bar MPLS tunnel of message sending module 16 for selecting for described selection module 15, the source node to described MPLS tunnel sends the tunnel failure notification packet carrying the Tunnel Identifier in described MPLS tunnel.

More preferably, when described judge module 14 specifically for receiving the described OAM message of described Section Point equipment transmission in described first setting duration, determine to be in normal condition with the connection of described Section Point equipment room; Otherwise, determine to be in abnormal state with the connection of described Section Point equipment room.

More preferably, the MPLS tunnel of the tunnel group that described tunnel group creation module 11 creates and all approach self and described Section Point equipment has binding relationship, or has binding relationship with the MPLS tunnel of part approach self and described Section Point equipment.

More preferably, described selection module 15 is specifically for selecting all MPLS tunnels with the group binding of described tunnel, or from the MPLS tunnel of described tunnel group binding select N bar MPLS tunnel, the priority in described N bar MPLS tunnel is higher than the priority in all the other MPLS tunnels in described tunnel group, and described N is positive integer.

According to the difference in the MPLS tunnel selecting module 15 to select, the source node that described message sending module 16 sends tunnel failure notification packet is also different, that is, which MPLS tunnel is described selection module 15 select, and described message sending module 16 just sends tunnel failure notification packet to the source node in the MPLS tunnel selected.

More preferably, described message sending module 16 is also for after sending described tunnel failure notification packet to the source node in the MPLS tunnel selected, when described receiver module 13 receives the OAM message of described Section Point equipment transmission at the second setting duration, for the MPLS tunnel that every bar is selected, the source node to described MPLS tunnel sends the tunnel failure carrying the Tunnel Identifier in described MPLS tunnel and removes message.

Embodiment four:

The embodiment of the present invention four also illustrates a kind of first node equipment belonged to embodiment one and embodiment two under same inventive concept, and as shown in Figure 5, described first node equipment comprises bus 21, and is connected to processor 22 and the interface 23 of bus 21, wherein:

Described processor 22 creates tunnel group for the Section Point equipment adjacent with first node equipment, the MPLS tunnel of described tunnel group and approach first node equipment and described Section Point equipment has binding relationship, and set up an OAM with described Section Point equipment room and detect session, described MPLS tunnel is carried on the physical link between first node equipment and described Section Point, and described OAM detects session for described physical link;

Described processor 22 is also for judging whether described interface 23 receives the OAM message of described Section Point equipment transmission in the first setting duration, and described OAM message belongs to described OAM and detects session;

Described processor 22 also for being when not receiving OAM message that described Section Point equipment sends in described first setting duration in judged result, from the MPLS tunnel of described tunnel group binding select at least one MPLS tunnel, trigger described interface 23;

The OAM message that described interface 23 sends for receiving described Section Point equipment, and when being subject to the triggering of described processor 22, for every bar MPLS tunnel that described processor 22 is selected, the source node to described MPLS tunnel sends the tunnel failure notification packet carrying the Tunnel Identifier in described MPLS tunnel.

More preferably, described processor 22 is specifically for when determining that described interface 23 receives the OAM message of described Section Point equipment transmission in described first duration, determine to be in normal condition with the connection of described Section Point equipment room according to the transmitting side marking wherein comprised, otherwise, determine to be in abnormal state with the connection of described Section Point equipment room.

More preferably, the tunnel group that described processor 22 creates can have binding relationship with the MPLS tunnel of all approach self and described Section Point equipment, or has binding relationship with the MPLS tunnel of part approach self and described Section Point equipment.

More preferably, described processor 22 is specifically for selecting all MPLS tunnels with the group binding of described tunnel, or from the MPLS tunnel of described tunnel group binding select N bar MPLS tunnel, the priority in described N bar MPLS tunnel is higher than the priority in all the other MPLS tunnels in described tunnel group, and described N is positive integer.

More preferably, after described interface 23 also sends tunnel failure notification packet for the source node in the MPLS tunnel selected to processor 22, when receiving the OAM message that described Section Point equipment sends in the second setting duration, for the MPLS tunnel that every bar is selected, the source node to described MPLS tunnel sends the tunnel failure carrying the Tunnel Identifier in described MPLS tunnel and removes message.

It should be noted that, the first node equipment involved by the embodiment of the present invention three and embodiment four kinds can refer to the arbitrary equipment in network topology architecture, PE1 or P1 as shown in Figure 3.Described first node equipment has the functional module realizing embodiment one and each step of embodiment two, repeats no more herein.

In the scheme of the embodiment of the present invention, a node in network topology architecture creates Tunnel-Group group for the physical interface (or by other nodes that this physical interface connects) of this locality, and by the MPLS tunnel (or MPLS tunnel of this node of approach and other be connected nodes) on this physical interface and the Tunnel-Group group binding created, the connection status of adjacent two nodes is detected by setting up OMS fast detecting session (i.e. single-hop detection example) between this node and other nodes connected, when connection status occurs abnormal, trigger and carry out disturbance switching with the source node in the MPLS tunnel of Tunnel-Group group binding.By the scheme of the embodiment of the present invention, the session of an OMS fast detecting is only set up between adjacent node, and do not change along with business increase or the network capacity extension, avoiding on the one hand the process that node detects sessions for many OAM causes the event of notification source node to occur the problem postponed, and guarantees the realization of the fast quick-recovery of 50ms fault; Meanwhile, also can greatly reduce and save the network bandwidth and device resource, strengthen the autgmentability of network.

Those skilled in the art should understand, the embodiment of the application can be provided as method, system or computer program.Therefore, the application can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the application can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The application describes with reference to according to the flow chart of the method for the embodiment of the present application, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

In one typically configuration, described computer equipment comprises one or more processor (CPU), input/output interface, network interface and internal memory.Internal memory may comprise the volatile memory in computer-readable medium, and the forms such as random access memory (RAM) and/or Nonvolatile memory, as read-only memory (ROM) or flash memory (flashRAM).Internal memory is the example of computer-readable medium.Computer-readable medium comprises permanent and impermanency, removable and non-removable media can be stored to realize information by any method or technology.Information can be computer-readable instruction, data structure, the module of program or other data.The example of the storage medium of computer comprises, but be not limited to phase transition internal memory (PRAM), static RAM (SRAM), dynamic random access memory (DRAM), the random access memory (RAM) of other types, read-only memory (ROM), Electrically Erasable Read Only Memory (EEPROM), fast flash memory bank or other memory techniques, read-only optical disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tape, tape magnetic rigid disk stores or other magnetic storage apparatus or any other non-transmitting medium, can be used for storing the information can accessed by computing equipment.According to defining herein, computer-readable medium does not comprise the computer readable media (transitorymedia) of non-standing, as data-signal and the carrier wave of modulation.

Although described the preferred embodiment of the application, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the application's scope.

Obviously, those skilled in the art can carry out various change and modification to the application and not depart from the spirit and scope of the application.Like this, if these amendments of the application and modification belong within the scope of the application's claim and equivalent technologies thereof, then the application is also intended to comprise these change and modification.

Claims

1. a fault detection method, is characterized in that, described method comprises:

First node creates tunnel group for the Section Point adjacent with self, described tunnel group with by way of the multiprotocol label switching MPLS tunnel of described first node and described Section Point, there is binding relationship, described MPLS tunnel is carried on the physical link between described first node and described Section Point;

2. the method for claim 1, is characterized in that, described method also comprises:

When described first node receives the described OAM message that described Section Point sends in the first setting duration, to determine and connection between described Section Point is in normal condition, otherwise, to determine and connection between described Section Point is in abnormal state.

3. method as claimed in claim 1 or 2, it is characterized in that, described tunnel group and all MPLS tunnels by way of described first node and described Section Point have binding relationship, or have binding relationship with the MPLS tunnel of first node described in part approach and described Section Point.

4. the method for claim 1, is characterized in that, described first node from the MPLS tunnel of described tunnel group binding select at least one MPLS tunnel, specifically comprise:

5. the method as described in as arbitrary in Claims 1 to 4, is characterized in that, described first node is to after the source node in the MPLS tunnel selected sends tunnel failure notification packet, and described method also comprises:

6. the method as described in as arbitrary in claim 1-4, is characterized in that, described OAM message and described tunnel failure notification packet are that the APS APS message of expansion or two-way converting detect BFD message;

7. a first node equipment, is characterized in that, described first node equipment comprises:

Tunnel group creation module, for creating tunnel group for the Section Point equipment adjacent with self, described tunnel group has binding relationship with by way of self and the multiprotocol label switching MPLS tunnel of described Section Point equipment, and described MPLS tunnel is carried on the physical link between self and described Section Point;

8. first node equipment as claimed in claim 7, is characterized in that,

Described judge module, during specifically for receiving the described OAM message of described Section Point equipment transmission in described first setting duration, determines to be in normal condition with the connection of described Section Point equipment room; Otherwise, determine to be in abnormal state with the connection of described Section Point equipment room.

9. first node equipment as claimed in claim 7 or 8, is characterized in that,

The tunnel group that described tunnel group creation module creates has binding relationship with all MPLS tunnels by way of self and described Section Point equipment, or has binding relationship with the MPLS tunnel of part approach self and described Section Point equipment.

10. first node equipment as claimed in claim 7, is characterized in that,

Described selection module, specifically for selecting all MPLS tunnels with the group binding of described tunnel, or from the MPLS tunnel of described tunnel group binding select N bar MPLS tunnel, the priority in described N bar MPLS tunnel is higher than the priority in all the other MPLS tunnels in described tunnel group, and described N is positive integer.

11. as arbitrary in claim 7 ~ 10 as described in first node equipment, it is characterized in that,

Described message sending module, also for after sending described tunnel failure notification packet to the source node in the MPLS tunnel selected, when described receiver module receives the OAM message of described Section Point equipment transmission at the second setting duration, for the MPLS tunnel that every bar is selected, the source node to described MPLS tunnel sends the tunnel failure carrying the Tunnel Identifier in described MPLS tunnel and removes message.