CN101729361B

CN101729361B - Method and device for processing message

Info

Publication number: CN101729361B
Application number: CN2008101673376A
Authority: CN
Inventors: �龙昊; 张海燕; 曾理
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-10-22
Filing date: 2008-10-22
Publication date: 2012-05-02
Anticipated expiration: 2028-10-22
Also published as: CN101729361A; WO2010045838A1

Abstract

The embodiment of the invention discloses a method and a device for processing a message, belonging to the technical field of communication. The method comprises the following steps of: receiving a transmitted business message in a network; acquiring an outer label and an inner label in the message; searching matched node operation according to the inner label or searching matched node operation according to the inner label and the outer label; if the matched node operation is found out, processing the message according to the node operation; and if the matched node operation is not found out, transmitting the message according to the outer label. The equipment comprises a receiving module, an acquiring module, a searching module and a processing module. The embodiment of the invention processes the message according to the outer label and the inner label of the business message, leads a plurality of businesses in the network to be capable of sharing a transmitting path, saves label resources, and improves the integral performance of the network.

Description

The method and apparatus that message is handled

Technical field

The present invention relates to network communications technology field, the method and apparatus that particularly a kind of message is handled.

Background technology

Ethernet and multiprotocol label switching (MPLS; Multi-Protocol Label Switching) is two kinds of common packet technologies; Ethernet technology is generally used for local area network (LAN); And the MPLS technology is generally used for core network, can transmit service message apace and can well support corporate virtual private networks network (VPN, Virtual Private Network) based on the network of MPLS technology.The direction evolution of netting based on the MPLS technology at present to transmission.Switch because ring-network topology is particularly suitable for the fastext protection, therefore present transmission Netcom often adopts ring topology, adopts the transmission net of MPLS technology, because optical fibre installation also can be carried on the annular physical topology.

In the MPLS network, the connection that the connection between the adjacent node is normally two-way can be the link of physics, also can be connection in logic; Usually there are a lot of Business Streams on the node in the network; Service message is when transmission; Need set up the Label Forwarding Information Base of label switched path (LSP, Label Switching Path) according to the routing iinformation of message; And be kept on the node, node is set up corresponding LSP according to Label Forwarding Information Base message is transmitted.

For guaranteeing the normal forwarding of message, corresponding protection mechanism also need be provided, in the scheme of present MPLS looped network protection the LSP that sets up backup for every LSP, when working LSP generation link failure, switch on the LSP of backup.MPLS loop network protection scheme of the prior art is based on physical rings topology, the LSP layer carry out professional up and down and transmission path switching.In this scheme; Set up the backup LSP of a closed loop for each protected LSP; When link failure occurring, business is switched to backup LSP detecting on the node of link failure, continue again to transmit along switching back former LSP after backup LSP is forwarded to another fault point.

After prior art was studied, the inventor found:

Because relate to the label exchange, the LSP in the network can't share to a plurality of business and use, and causes the waste of LSP and label resources.

Summary of the invention

The method and apparatus that the embodiment of the invention provides a kind of message to handle can improve the middle transmission path of network and the utilance of label resources.Said technical scheme is following:

The method that a kind of message is handled, said method comprises:

Receive the service message of transmission through network;

Obtain outer layer label and vpn label in the said message;

Search the nodal operation of coupling according to said vpn label, or search the nodal operation of coupling according to said vpn label and outer layer label;

If find the nodal operation of coupling, then said message is handled according to said nodal operation;

If do not find the nodal operation of coupling, then said message is transmitted according to said outer layer label;

Wherein, if the said nodal operation that finds coupling is then handled said message according to said nodal operation, specifically comprise:

If the nodal operation that finds coupling then receives said message according to said nodal operation for receiving message;

If finding the nodal operation of coupling is dropping packets, then abandon said message according to said nodal operation.

The device that the embodiment of the invention also provides a kind of message to handle, said device comprises:

Receiver module is used to receive the service message of transmission through network;

Acquisition module is used for obtaining the outer layer label and the vpn label of said message;

Search module, be used for searching the nodal operation of coupling, or search the nodal operation of coupling according to said vpn label and outer layer label according to said vpn label;

Processing module is used for the lookup result of searching module according to said, and said message is handled, if find the nodal operation of coupling, then according to said nodal operation said message is handled; If do not find the nodal operation of coupling, then said message is transmitted according to said outer layer label;

Wherein, said processing module, specifically be used for when said search module searches to the nodal operation of coupling when receiving message, then receive said message according to said nodal operation; When the said module searches of searching when being dropping packets, then abandons said message according to said nodal operation to the nodal operation of coupling.

The embodiment of the invention is handled message according to the outer layer label and the vpn label of service message, realizes receiving business from the different nodes of same transmission path, has practiced thrift label resources, has improved network performance.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the method flow diagram that the message that provides of the embodiment of the invention 1 is handled;

Fig. 2 is the method flow diagram that the message that provides of the embodiment of the invention 2 is handled;

Fig. 3 is the service protecting method flow chart in the method handled of the message that provides of the embodiment of the invention 3;

Fig. 4 is the sketch map of the application scenarios of the method handled of the message that provides of the embodiment of the invention 3 and 5;

Fig. 5 is the sketch map of the application scenarios of the method handled of the message that provides of the embodiment of the invention 3 and 5;

Fig. 6 is the sketch map of the application scenarios of the method handled of the message that provides of the embodiment of the invention 3 and 5;

Fig. 7 is the sketch map of the application scenarios of the message processing method that provides of the embodiment of the invention 3;

Fig. 8 is the method flow diagram that the message that provides of the embodiment of the invention 4 is handled;

Fig. 9 is the service protecting method flow chart in the method handled of the message that provides of the embodiment of the invention 5;

Figure 10 is the structure chart of the device handled of the message that provides of the embodiment of the invention 6.

Embodiment

For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.

Embodiment 1

The method that the embodiment of the invention provides a kind of message to handle, referring to Fig. 1, this method comprises:

101: the service message that receives transmission through network;

102: obtain outer layer label and vpn label in this message;

103: the nodal operation of searching coupling according to this vpn label; Or search the nodal operation of coupling according to this vpn label and outer layer label; If find the nodal operation of coupling, carry out 104; If do not find the nodal operation of coupling, carry out 105.

104: according to this nodal operation this message is handled, flow process finishes.

105: according to this outer layer label this message is transmitted, flow process finishes.

Embodiment 2

The method that the embodiment of the invention provides a kind of message to handle, this method comprises: use outer layer label and vpn label to handle the service message in the network, outer layer label is used for service message is transmitted; Vpn label is used to distinguish different service.Concrete, in heterogeneous networks, can choose different outer layers label and vpn label.Such as at the MPLS network, can choose the LSP label is vpn label, and the PW label is a vpn label.In VLAN, can choose outer field VLAN label as outer layer label, the VLAN label of internal layer is as vpn label.

Before message is handled, need carry out following preparation process:

Pre-configured processing list item in each node of network; Be specially: according to the mapping relations of preset service message and outer layer label, vpn label; Confirm pairing outer layer label of each service message and vpn label in the network, and in each node, dispose the pairing nodal operation of each service message.

This processing list item comprises: the outer layer label of service message, vpn label and Action label, and wherein, the Action label is outer layer label and the pairing nodal operation of vpn label, the Action label comprises:

Drop: receive, promptly take off this message, no longer transmit.

Drop and Continue: receive and transmit, promptly duplicate a message and receive at this node, the outer layer label according to message E-Packets simultaneously.

Discard: abandon, promptly abandon this message.

After above-mentioned preparation process is accomplished; When network edge node receives service message at user side; Mapping relations according to preset service message and outer layer label, vpn label; Confirm the outer layer label and the vpn label of this service message, be encapsulated in this message this outer layer label and vpn label and forwarding.

After node in the network is received this message, obtain outer layer label and vpn label in this message, this message is arrived destination node in transmission through network.Referring to Fig. 2, the concrete steps that message is handled are:

201: the node in the network receives the service message of transmission through network.

202: obtain outer layer label and vpn label in this message.

203: in pre-configured processing list item, search the nodal operation of coupling according to this outer layer label and vpn label; If find the nodal operation of coupling, then carry out 204, if do not find the nodal operation of coupling, then carry out 205.

The node that receives message is when searching the nodal operation of coupling; Search according to outer layer label and vpn label simultaneously; Promptly in the pre-configured processing list item of this node; Search with message in the processing list item that matees simultaneously of outer layer label and vpn label, if can find the processing list item that is complementary, then this message is handled according to the nodal operation in this list item; If do not find the processing list item of coupling, this message transmitted according to this outer layer label.

As shown in table 1 is the processing list item of certain node, and in this list item, outer layer label is the LSP label, and vpn label is the PW label, and node is confirmed nodal operation according to the LSP label in the message and this list item of PW searching label when receiving service message.

204: this nodal operation according to finding is handled this message, and flow process finishes.

205: according to this outer layer label this message is transmitted, flow process finishes.

Concrete, be that example describes with the processing list item in the table 1, if handle in the list item list item that matees simultaneously with LSP label and PW label is arranged, then confirm the node corresponding operation according to this coupling list item; If in the processing list item not with the list item of PW tag match, the list item with the LSP tag match is only arranged, then according to LSP label forwarding message.According to LSP label forwarding message the time, can transmit message according to LSP label lookup forwarding-table item, as shown in table 2 is the example of forwarding-table item.

Need to prove,, then be judged to be unknown message and carry out discard processing if the outer layer label in the message that receives does not all match with the outer layer label of handling in the list item.

LSP goes into label	Inbound port	The PW label	Action
				100	3	20	Drop
200	3	40	Drop?and?Continue
				100	3	40	Discard

Table 1

LSP goes into label	Inbound port	The LSP outgoing label	Outbound port
				100	3	300	5
200	3	400	6

Table 2

For example, it is 100 that above-mentioned node receives the LSP label from port 3, and the PW label is that the query processing list item is Drop, then takes off this message behind 20 the message, no longer transmits; When this node receives the LSP label from port 3 is 200, and the PW label is behind 40 the message, then to duplicate this message at this node, simultaneously according to the LSP label forwarding message of message; When this node receives the LSP label from port 3 is 100, and the PW label is behind 40 the message, inquires node corresponding and is operating as and abandons, and then directly abandons this message; If it is 100 that this node receives the LSP label from port 3, the PW label is 30 message, does not have corresponding PW label in the list item owing to handle; Then directly transmit according to the LSP label; After being question blank 2, label is exchanged for 300, forwards from port 5 at outbound port; If it is 500 that node receives the LSP label, the PW label is 30 message, handles the LSP label that does not have coupling in the list item, then is judged to be unknown message and carries out discard processing.

Embodiment 3

The embodiment of the invention provides the method that message is handled in a kind of loop network, and on this basis, has further proposed in the process that the loop network message is handled, to carry out the method for service protection.

The method that the message that the embodiment of the invention provides is handled is identical with embodiment 2, specifically is applied in the loop network, and such as being applied to the MPLS loop network, in this MPLS loop network, outer layer label can be the LSP label, and vpn label can be the PW label.

Before message is handled, need carry out following preparation process:

In this MPLS loop network, dispose two rightabout closed loop LSP, two closed loops all comprise all nodes in the loop network, and two closed loop LSP of configuration can be two ring LSP or two two-way ring LSP in the opposite direction.

Concrete; The looped network of forming with A, B, C, D, E, six nodes of F is an example; In looped network, it is LSP_CC to the anticlockwise LSP of A node that configuration comprises whole six nodes and two closed loop LSP:B nodes in the opposite direction, and the A node is LSP_CW to the clockwise LSP of B node.

For each business of in looped network, transmitting; According to the mapping relations of preset service message and LSP label, PW label, confirm the LSP label and the PW label of service message, and carry out pre-configured to the processing list item of the node in the looped network according to this LSP label and PW label; Wherein, PW label the whole network of each service message is unique, and the following link point of service message must be configured, and last link point need be configured according to concrete application scenarios with other intermediate nodes.Need to prove that in loop network, last link point promptly receives the network edge node of service message at user side, following link point is the Egress node that message is transmitted in loop network.

For example a last link point is that F, following link point are the service message of C; In the mapping relations of service message and LSP label, PW label; Its PW label is 10; The LSP label is the label on the LSP_CC, be mapped on the LSP_CC and transmit, then configuration PW label on the node C be 10 and the pairing nodal operation of LSP label that belongs on the LSP_CC direction be Drop; If node E need duplicate a message when E-Packeting, then can be in node E with the PW label be 10 and the pairing nodal operation of LSP label that belongs on the LSP_CC direction be configured to Drop and Continue.

After above-mentioned preparation is accomplished, just can in loop network, carry out message forwarding, but lack service protection mechanism this moment, can not guarantee the service message processing security.Such as, when link occurs fault, can not carry out the protection of professional transmission and handle, cause service message to lose.

Further, be the fail safe that guarantees that message is transmitted in loop network, before message is handled, can also carry out the protection of Network, referring to Fig. 3, the method for being engaged in protecting in the enterprising industry of this MPLS looped network is:

301: carry out link detecting between the adjacent node in the loop network.

302: when node detection arrives link failure; This node (Wrapping) state that is set to unroll then; The pairing port of the link that breaks down is set to non-working port, and sends APS (APS, Automatic Protection Switching) message.

Further, in the protocol processing unit of APS message, the APS message comprises:

Non-working port information, wherein non-working port is the central port that detects fault, can be forward end mouth or reverse port, and the inbound port of regulation reception message is the forward port usually, and the outbound port that E-Packets is a reverse port.

Sending node sign (Destination identification identity), wherein sending node promptly detects link failure and sends the node of APS message.

Destination node sign (Source identification identity), wherein destination node is the link that breaks down or the adjacent interdependent node of node.

Protection switching request information: comprise the type of switching that triggers APS, like Signal Fail SF (Signal Fail) or there is not request NR (No Request).In the present embodiment, when node detection arrived link failure, the type of switching of the protection switching request information in the APS message that then sends was a Signal Fail.

Concrete; When the node detection in the looped network arrives link failure; Get into the Wrapping state, and on two ring LSP, send the APS message respectively, promptly in the APS message, on corresponding ring LSP, transmit behind the LSP label on encapsulation LSP_CC and the LSP_CW direction respectively; Wherein the PW label of APS message is preset particular value, and this special P W label is used for the APS message and service message is distinguished.

303: after node in the looped network received and goes out this APS message according to special P W tag recognition, the APS module that then sends to present node was handled, and carries out the corresponding operating of service protection.Concrete grammar does;

1), then ignores this APS message if present node has been in the Wrapping state.

2) if present node is in normal condition, and judge the destination node that present node is not this APS message, then according to this APS message of the LSP label forwarding in this APS message through destination node sign.

3) if present node is in normal condition; And judge that through the destination node sign present node is the destination node of this APS message; Then get into the Wrapping state, and be set to non-working port according to corresponding port on the non-working port information present node in this APS message.Concrete grammar is: when the non-working port information in the APS message is the forward port of sending node, then the present node reverse port is made as non-working port; Otherwise when the non-working port information in the APS message was the reverse port of sending node, then the forward port with present node was made as non-working port.

For example; Fault has taken place to the link on the node D direction in node E, and node D detects the forward port and fault occurred, then on two ring LSP, sends the APS message respectively; Wherein non-working port information is the forward port; Sending node is designated the sign of node D, and destination node is designated the sign of node E, and the type of switching in the protection switching request information is a Signal Fail.Node E is after receiving the APS message, and identifying this node is destination node, and non-working port is the forward port, and then the reverse port of this node is set to non-working port, is about to be set to non-working port towards the outbound port of node D.

Get into the node of Wrapping state; All are all carried out the switching of LSP direction from non-non-working port to the service message that non-working port sends; The LSP label that is about in the message switches to reverse LSP label, and according to the LSP label after switching message is handled.

After above-mentioned preparation process and service protection step are carried out, just can in this loop network, E-Packet, and E-Packet and have certain fail safe, concrete steps are:

1) by skin encapsulation LSP label and the PW label of last link point, and according to LSP label forwarding message at service message.For example the LSP label of message belongs to the label on the LSP_CC, then according to counterclockwise E-Packeting.

2) other nodes if present node is in the Wrapping state, are then handled message according to the method for service protection after receiving message; If present node is normal, then obtain LSP label and PW label in the message, and handle list item according to LSP label and PW searching label, in the time finding the node corresponding operation, then message is handled according to nodal operation; When not finding the nodal operation of coupling, then message is transmitted according to the LSP label.

Introduce the method for service message processing in this MPLS loop network and the method for service protection below in conjunction with concrete application scenarios.

Referring to Fig. 4; In the looped network that node A, B, C, D, E, F form, be F for last link point, following link point is the service message of C; In the mapping relations of service message and LSP label, PW label; The PW label of this message is 10, and the LSP label is the label on the LSP_CC, on the LSP_CC direction, transmits; For last link point is C, and following link point is the service message of F, and in the mapping relations of service message and LSP label, PW label, the PW label of this message is 12, and the LSP label is the label on the LSP_CW, on the LSP_CW direction, transmits.

First kind of application scenarios: link and node are all normal, are that example describes with node F to node C transport service, and then in the processing list item of node C, LSP label on the pre-configured LSP_CC direction and PW label are that the nodal operation of 10 service message is Drop.

The process that message is handled in this scene is following:

401: after this service message arrives node F, the mapping relations of message that node F basis is preset and LSP label, PW label, the LSP label and the PW label of this message of encapsulation in message, wherein the LSP label is the label on the LSP_CC, the PW label is 10.Node E is handled with this message in the encapsulation back on the LSP_CC direction.

402: node E obtains LSP label and PW label in the message after receiving message, according to LSP label and the operation of PW label lookup node corresponding.Owing in the configuration list item of node E, do not have pre-configured this LSP label and the pairing operation of PW label; Then node E confirms that according to the LSP label message forwarding direction is LSP_CC; On the LSP_CC direction, this message is handled node D, node D handles node C according to identical method with message.

403: node C obtains LSP label and PW label in the message after receiving message, operates according to LSP label and PW label lookup node corresponding, finds to be Drop, then with message decapsulation and reception.

Second kind of application scenarios: link generation bi-directional failure is that example describes with node F to node C transport service, and then in the processing list item of node C, LSP label on the pre-configured LSP_CC direction and PW label are that the nodal operation of 10 service message is Drop.

The process of service protection is following in this scene:

Referring to Fig. 5; Each node in the looped network that node A, B, C, D, E, F form is all normal; But fault has taken place in the link between node E and the node D, and node D and node E get into the Wrapping state after detecting link failure, and the faulty link corresponding port is set to non-working port; And on two LSP directions, send the APS message simultaneously, and the protection switching request in the APS message is a Signal Fail.Supplementary notes be, after node D and node E receive the APS message, obtain LSP label and PW label in the message, by the APS resume module of node E, this node of APS module judgement current state is the Wrapping state, then ignores received APS message.

The process that message is handled in this scene is following:

501: after this service message arrives the F node, the mapping relations of message that node F basis is preset and LSP label, PW label, the LSP label and the PW label of this message of encapsulation in message, wherein the LSP label is the label on the LSP_CC, the PW label is 10.The encapsulation back is forwarded to node E with this message on the LSP_CC direction.

502: because node E is in the Wrapping state; And the inbound port at node E of service message is non-non-working port; But outbound port is a non-working port; Service message transmits to non-working port from non-non-working port, so node E switches to LSP_CW with this message from LSP_CC and transmit, and the LSP label that is about to message switches to the label on the LSP_CW direction; And according to LSP label on the LSP_CW direction after switching and the operation of PW label lookup node corresponding; Owing in the configuration list item of node E, do not have pre-configured LSP label and the pairing operation of PW label, then node E confirms that according to the LSP label message routing direction is LSP_CW, then on LSP_CW, message is forwarded to F according to the LSP label after switching.

503: node F is after receiving message; The LSP label that obtains in the message is the LSP label on the LSP_CW direction, and the PW label is 10, and operates accordingly according to LSP label and PW label lookup; Owing to there is not pre-configured node corresponding operation; Then in the LSP_CW direction this message is forwarded to node A according to the LSP label, node A is forwarded to Node B according to identical method with message, and Node B is forwarded to node C with message.

504: node C is after receiving message; Obtain LSP label information and PW label information in the message; The LSP label and the PW label that find on the LSP_CW direction are 10 pairing nodal operations; Owing to do not have pre-configured node corresponding operation, then this message be forwarded to node D according to the LSP label.

505: after node D receives message; Owing to be in the Wrapping state; And service message is to transmit to non-working port from non-non-working port, therefore the LSP_CW label in the message is switched to the LSP_CC label, according to LSP_CC label after switching and the operation of PW label lookup node corresponding; Owing to do not have pre-configured node corresponding operation, then on the LSP_CC direction, message be forwarded to node C.

506: node C is after receiving message, and the LSP label that obtains in the message is the label on the LSP_CC direction, and the PW label is 10, according to LSP label and PW label, searches corresponding nodes and is operating as Drop, then receives this message, and flow process finishes.

The third application scenarios: link generation unidirectional fault; Referring to Fig. 6; Each node in the looped network that node A, B, C, D, E, F form is all normal; But fault has taken place to the link on the node D direction in node E, and node D is still normal to the link on the node E direction, therefore has only node D to detect link failure.

The process of service protection is following in this scene:

Node D detects node E and to the link on the node D direction fault has taken place, and gets into the Wrapping state, and the pairing port of faulty link is set to non-working port; The forward port that is about to node D is set to non-working port; And on two LSP directions, send the APS message, and wherein non-working port information is the forward port, sending node is designated the sign of node D; Destination node is designated the sign of node E, and the type of switching in the protection switching request information is a Signal Fail.Node E obtains LSP label and PW label in the message, by the APS resume module of node E after receiving the APS message; The APS module judges that this node current state is normal; Identifying this node according to destination node is destination node, then this node is set to the Wrapping state, and the non-working port information in the APS message is the forward port of node D; Then the reverse port of this node is set to non-working port, is about to be set to non-working port towards the outbound port of node D.

In this scene, the process that message is handled is:

As node F during to node C transport service; Then in the processing list item of node C; LSP label on the pre-configured LSP_CC direction and PW label are that the nodal operation of 10 service message is Drop, and this moment is identical with second kind of application scenarios to the message forwarding process, repeats no more.

As node C during to node F transport service; Then in the processing list item of node F, LSP label on the pre-configured LSP_CW direction and PW label are that the nodal operation of 12 service message is Drop, and this moment, node D was in the Wrapping state; But node D is still normal to the link on the node E direction; Owing to be message transmission between non-non-working port, therefore can carry out normal professional transmission, repeat no more here.

The 4th kind of application scenarios: node failure is that example describes with node F to node C transport service, referring to Fig. 7; In the looped network that node A, B, C, D, E, F form, each node and link in the loop network are all normal, but fault has taken place node C; Node D and Node B detect and can't carry out transfer of data with node C; Be judged to be towards the link of node C fault has taken place, get into the Wrapping state, be set to non-working port towards the port of node C.

For preventing that message forwarding from forming loop, the solution that the embodiment of the invention proposes is: when the last link point of a business receives the service message that is packaged with this business corresponding outer layer label and vpn label from the central port, then abandon this service message.When promptly going up link point and on the direction that service message is transmitted, receiving this message once more, explain that the forwarding of message in loop network formed loop, should abandon this message at this moment.With this scene is example, and in the processing list item of node F, LSP label on the configuration LSP_CC direction and PW label are the Discard that is operating as of 10 correspondences.

The process of service protection is following in this scene:

Node D and Node B detect towards the link of node C fault have taken place, and get into the Wrapping state, and the pairing port of faulty link is set to non-working port, and on two LSP directions, send the APS message.Need to prove that in the APS message that Node B and node D send in the present embodiment, destination node all is node C, but because node C fault is ignored the effect of APS message here.

The process that service message is handled in this scene is following:

701: after this service message arrives node F, the mapping relations of message that node F basis is preset and LSP label, PW label, the LSP label and the PW label of this message of encapsulation in message, wherein the LSP label is the label on the LSP_CC, the PW label is 10.The encapsulation back is forwarded to node E with this message on the LSP_CC direction.

702: node E is forwarded to node D with message; Because node D is in the Wrapping state; And service message is to transmit to non-working port from non-non-working port, then this message is switched to LSP_CW from LSP_CC and transmits, and the LSP label that is about to message switches to the label on the LSP_CW direction; And according to label on the LSP_CW direction after switching and the operation of PW label lookup node corresponding; Because do not have pre-configured node corresponding operation, then node D confirms that according to the LSP label message routing direction is LSP_CW, then on LSP_CW, message is forwarded to E according to the LSP label after switching.

703: node E is forwarded to node F with message; Node F is after receiving message, and the LSP label that obtains in the message belongs to LSP_CW, and the PW label is 10; And according to LSP label and the operation of PW label lookup node corresponding; Owing to there is not pre-configured node corresponding operation, then in the LSP_CW direction this message is forwarded to node A according to the LSP label, node A is forwarded to Node B according to identical method with message.

704: after Node B is received message; Owing to be in the Wrapping state; And service message is to transmit to non-working port from non-non-working port, and the LSP_CW label in the message is switched to the LSP_CC label, according to LSP_CC label after switching and the operation of PW label lookup node corresponding; Owing to do not have pre-configured node corresponding operation, then on the LSP_CC direction, message be forwarded to node A.

705: node A continues to E-Packet until being forwarded to node F, and node F is operating as Discard according to LSP label and PW label lookup node corresponding, then abandons this message, and flow process finishes.

The embodiment of the invention is handled message according to the LSP label and the PW label of service message; Be implemented in when receiving the multiple business message in the network; Can receive service message from the different nodes of same LSP, practice thrift label resources, be adapted at ring network and use.

Embodiment 4

The method that the embodiment of the invention provides a kind of message to handle, this method is simplified the method that embodiment 2 provides, and when pre-configured nodal operation, only is configured according to vpn label; Node is also only searched corresponding operation according to vpn label when message is handled, as shown in Figure 8, and this method comprises:

Before message is handled, need carry out following preparation process:

This processing list item comprises: service message vpn label and Action label, and wherein, the Action label is outer layer label and the pairing nodal operation of vpn label, the Action label comprises:

Drop: receive, promptly take off this message, no longer transmit.

After node in the network is received this message, obtain outer layer label and vpn label in this message, this message is arrived destination node in transmission through network.Referring to Fig. 8, the concrete steps that message is handled are:

801: the node in the network receives the service message of transmission through network.

802: obtain outer layer label and vpn label in this message.

803: in pre-configured processing list item, search the nodal operation of coupling according to vpn label; If find the nodal operation of coupling, then carry out 804, if do not find the nodal operation of coupling, then carry out 805.

804: this nodal operation according to finding is handled this message;

805: this message is transmitted according to this outer layer label.

The node that receives message is when searching the nodal operation of coupling; Search in the pre-configured processing list item of this node according to vpn label; Search with message in the processing list item of vpn label coupling; If can find the processing list item that is complementary, then this message handled according to the nodal operation in this list item; If do not find the processing list item of coupling, this message transmitted according to this outer layer label.

The embodiment of the invention is handled message according to the vpn label of service message; According to outer layer label message is transmitted; Be implemented in when receiving the multiple business message in the network; Can receive service message from the different nodes of same transmission path, practice thrift label resources, be adapted at using in the ring network.

Embodiment 5

The method that the message that the embodiment of the invention provides is handled is identical with embodiment 4, specifically is applied in the loop network, and such as being applied to the MPLS loop network, in this MPLS loop network, outer layer label can be the LSP label, and vpn label can be the PW label.

Before message is handled, need carry out following preparation process:

For each business of in looped network, transmitting; According to the mapping relations of preset service message and LSP label, PW label, confirm the LSP label and the PW label of service message, and carry out pre-configured to the processing list item of the node in the looped network according to this PW label; Wherein, PW label the whole network of each service message is unique, and the following link point of service message must be configured, and last link point need be configured according to concrete application scenarios with other intermediate nodes.

For example a last link point is that F, following link point are the service message of C; In the mapping relations of service message and LSP label, PW label; Its PW label is 10; The LSP label is the label on the LSP_CC, is mapped on the LSP_CC and transmits, and then configuration PW label is that 10 pairing nodal operations are Drop on node C; If node E need duplicate a message when E-Packeting, then can be in node E be that 10 pairing nodal operations are configured to Drop and Continue with the PW label.

After above-mentioned preparation is accomplished, just can in loop network, carry out message forwarding, but lack service protection mechanism this moment, can not guarantee the correctness that service message is handled.

Further, be the fail safe that guarantees that message is transmitted in loop network, before message is handled, can also carry out the protection of Network, referring to Fig. 9, the method for being engaged in protecting in the enterprising industry of this MPLS looped network is:

901: carry out link detecting between the adjacent node in the loop network.

902: when node detection arrived link failure, then this node was set to the Wrapping state, and the pairing port of the link that breaks down is set to non-working port, and sent the APS message.

Concrete; When the node detection in the looped network arrives link failure; Get into the Wrapping state, and on two ring LSP, send the APS message respectively, promptly in the APS message, on corresponding ring LSP, transmitting behind the LSP label on encapsulation LSP_CC and the LSP_CW direction respectively; Wherein the PW label of APS message is preset particular value, and this special P W label is used for the APS message and service message is distinguished.

903: after node in the looped network received and goes out this APS message according to special P W tag recognition, the APS module that then sends to this node was handled, and carries out the corresponding operating of service protection.Concrete grammar does;

2) other nodes if present node is in the Wrapping state, are then handled message according to the method for service protection after receiving message; If present node is normal, then obtain LSP label and PW label in the message, and handle list item according to the PW searching label, in the time finding the node corresponding operation, then message is handled according to nodal operation; When not finding the nodal operation of coupling, then message is transmitted according to the LSP label.

First kind of application scenarios: link and node are all normal, are that example describes with node F to node C transport service, and then in the processing list item of node C, pre-configured PW label is that the nodal operation of 10 service message is Drop.

The process that message is handled in this scene is following:

1001: after this service message arrives node F, the mapping relations of message that node F basis is preset and LSP label, PW label, encapsulation LSP label and PW label in message, wherein the LSP label is the label on the LSP_CC, the PW label is 10.The encapsulation back is forwarded to node E with this message on the LSP_CC direction.

1002: node E obtains LSP label and PW label in the message after receiving message, operate according to PW label lookup node corresponding.Owing in the configuration list item of node E, do not have pre-configured this LSP label and the pairing operation of PW label; Then node E confirms that according to the LSP label message forwarding direction is LSP_CC; On the LSP_CC direction, this message is forwarded to node D, node D is forwarded to node C according to identical method with message.

1003: node C obtains LSP label and PW label in the message after receiving message, operates according to PW label lookup node corresponding, finds to be Drop, then with message decapsulation and reception.

Second kind of application scenarios: link generation bi-directional failure is that example describes with node F to node C transport service, and then in the processing list item of node C, pre-configured PW label is that the nodal operation of 10 service message is Drop.

The process of service protection is following in this scene:

The process that message is handled in this scene is following:

1101: after this service message arrives the F node, the mapping relations of message that node F basis is preset and LSP label, PW label, encapsulation LSP label and PW label in message, wherein the LSP label is the label on the LSP_CC, the PW label is 10.The encapsulation back is forwarded to node E with this message on the LSP_CC direction.

1102: because node E is in the Wrapping state; And the inbound port at node E of service message is non-non-working port, but outbound port is a non-working port, and service message transmits to non-working port from non-non-working port; Therefore node E switches to LSP_CW with this message from LSP_CC and transmits; The LSP label that is about to message switches to the label on the LSP_CW direction, and according to the operation of PW label lookup node corresponding, owing in the configuration list item of node E, there is not the pairing operation of pre-configured PW label; Then node E confirms that according to the LSP label message routing direction is LSP_CW, then on LSP_CW, message is forwarded to F according to the LSP label after switching.

1103: node F is after receiving message; The LSP label that obtains in the message is the LSP label on the LSP_CW direction, and the PW label is 10, and operates accordingly according to the PW label lookup; Owing to there is not pre-configured node corresponding operation; Then in the LSP_CW direction this message is forwarded to node A according to the LSP label, node A is forwarded to Node B according to identical method with message, and Node B is forwarded to node C with message.

1104: node C is after receiving message, and the LSP label that obtains in the message is the label on the LSP_CW direction, and the PW label is 10, according to this PW label, searches corresponding nodes and is operating as Drop, then receives this message, and flow process finishes.

The process of service protection is following in this scene:

In this scene, the process that message is handled is:

As node F during to node C transport service, then in the processing list item of node C, pre-configured PW label is that the nodal operation of 10 service message is Drop, and this moment is identical with second kind of application scenarios to the message forwarding process, repeats no more.

As node C during to node F transport service; Then in the processing list item of node F, pre-configured PW label is that the nodal operation of 12 service message is Drop, and this moment, node D was in the Wrapping state; But node D is still normal to the link on the node E direction; Owing to be message transmission between non-non-working port, therefore can carry out normal professional transmission, repeat no more here.

Embodiment 6

The device that the embodiment of the invention provides a kind of message to handle, referring to Figure 10, this device comprises:

Receiver module 1001 is used to receive the service message of transmission through network;

Acquisition module 1002 is used for obtaining the outer layer label and the vpn label of this message;

Search module 1003, be used for searching the nodal operation of coupling, or search the nodal operation of coupling according to this vpn label and outer layer label according to this vpn label;

Processing module 1004 is used for searching according to this lookup result of module 1003, and this message is handled, if find the nodal operation of coupling, then according to this nodal operation this message is handled; If do not find the nodal operation of coupling, then this message is transmitted according to this outer layer label.

Further, this processing module 1004 specifically is used for searching nodal operation that module 1003 finds coupling when receiving message when this, then receives this message according to this nodal operation.When this is searched nodal operation that module 1003 finds coupling and is dropping packets, then abandon this message according to this nodal operation.

Again one the step, in the MPLS network, this outer layer label is the LSP label, this vpn label is pseudo-line PW label.When the embodiment of the invention is used in loop network, pre-configured two ring LSP in loop network, two ring LSP can be two ring LSP or two two-way ring LSP in the opposite direction.In this loop network,

This device also comprises:

Configuration module, be used for when this device when receiving the fringe node of this message, then in this device, the pairing nodal operation of the outer layer label of pre-configured this message and vpn label is a dropping packets;

Accordingly, this processing module 1004 is used for when this is searched nodal operation that module 1003 finds coupling according to this vpn label and outer layer label and is dropping packets, then abandoning this message.

Concrete, for the function of service protection is provided, this device can also comprise:

Detection module, be used to detect and adjacent node between link whether fault has taken place;

Fault processing module, be used for when this detection module detect and this adjacent node between link occurs fault the time, will switch to another ring LSP from the service message that receives of ring LSP and handle;

The APS module; Be used for when this detection module detect and this adjacent node between link occurs fault the time; In this network, send APS APS message to this adjacent node; After this APS message is used for this adjacent node and receives this APS message, will switch to another ring LSP from the service message that a ring LSP receives and handle.

Wherein, be packaged with the PW label in this APS message, the value of this PW label is a preset value, and this PW label is used for present node the APS message is discerned.

The embodiment of the invention is handled message according to the vpn label of service message; According to outer layer label message is transmitted; Be implemented in when receiving the multiple business message in the network; Can receive service message from the different nodes on the same transmission path, practice thrift label resources, be adapted at ring network and use.

One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Said program can be stored in the computer read/write memory medium, and said storage medium is floppy disk, hard disk or the CD etc. of computer.

The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. the method handled of a message is characterized in that said method comprises:

Receive the service message of transmission through network;

Obtain outer layer label and vpn label in the said message;

2. the method that message according to claim 1 is handled is characterized in that said outer layer label is the label switching path LSP label, and said vpn label is pseudo-line PW label.

3. the method that message according to claim 1 is handled is characterized in that said method also comprises:

If receiving the node of the service message of transmission through network is fringe node, then before the service message that receives transmission through network, also comprise: the pairing nodal operation of the outer layer label of pre-configured said message and vpn label is a dropping packets;

Accordingly, saidly search the nodal operation of coupling according to said vpn label and outer layer label; If find the nodal operation of coupling, then said message is handled according to said nodal operation, specifically comprise:

Search the nodal operation of coupling according to said vpn label and outer layer label, when the nodal operation that finds coupling is dropping packets, then abandon said message.

4. the method that message according to claim 2 is handled is characterized in that, said network is the loop network that comprises two ring LSP, before the service message of said reception transmission through network, also comprises:

Whether the link between detection and the adjacent node fault has taken place;

And if fault has taken place the link between the said adjacent node, then will switch to another ring LSP from the service message that a ring LSP receives and handle; And send APS APS message to said adjacent node, after said APS message is used for said adjacent node and receives said APS message, also will switch to another ring LSP from the service message that a ring LSP receives and handle.

5. the method that message according to claim 4 is handled is characterized in that, said two ring LSP are two ring LSP or two two-way ring LSP in the opposite direction.

6. the method that message according to claim 4 is handled is characterized in that,

Be packaged with the PW label in the said APS message, the value of said PW label is a preset value, is used for present node the APS message is discerned.

7. the device handled of a message is characterized in that said device comprises:

8. the device that message according to claim 7 is handled is characterized in that said outer layer label is the LSP label, and said vpn label is the PW label.

9. the device that message according to claim 7 is handled is characterized in that said device also comprises:

Configuration module is used for when said device is fringe node, and in said device, the pairing nodal operation of the outer layer label of pre-configured said message and vpn label is a dropping packets;

Accordingly, said processing module is used for when searching nodal operation that module finds coupling according to said vpn label and outer layer label and being dropping packets, then abandoning said message said.

10. the device that message according to claim 8 is handled is characterized in that, said network is the loop network that comprises two ring LSP, and said device also comprises:

Detection module, whether the link that is used to detect between said device and the adjacent node fault has taken place;

Fault processing module, be used for when said detection module detect and said adjacent node between link occurs fault the time, will switch to another ring LSP from the service message that receives of ring LSP and handle;

The APS module; Be used for when said detection module detect and said adjacent node between link occurs fault the time; Send the APS message to said adjacent node; After said APS message is used for said adjacent node and receives said APS message, will switch to another ring LSP from the service message that a ring LSP receives and handle.

11. the device that message according to claim 10 is handled is characterized in that, said two ring LSP are two ring LSP or two two-way ring LSP in the opposite direction.

12. the device that message according to claim 10 is handled is characterized in that,