CN101984591A - Service convergence method and system in transport-multiprotocol label switching network - Google Patents
Service convergence method and system in transport-multiprotocol label switching network Download PDFInfo
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Abstract
The invention discloses a service convergence method in a transport-multiprotocol label switching (T-MPLS) network, which comprises the following steps: a provider-edge device (PE) connected with a customer-edge device regularly scans the port status of respective customer access port, and a customer signal failure (CSF) message is transmitted to the CE-dual homed PE when the port is in a port fault status; after receiving the CSF message, the CE-dual homed PE updates the value in a master PW ACTIVATED/FAILED field among its own forwarding-table items to FAILED; and after receiving the data message to be transmitted to the far-end CE, the CE-dual homed PE transmits the data message according to the updated forwarding-table items. The invention also discloses a service convergence system in a T-MPLS network. By using the method and system, the invention can realize the rapid convergence of the service in case of a link fault, thereby meeting the requirements of the carrier Ethernet for service switching time.
Description
Technical field
The present invention relates to transmit multi protocol label exchange (T-MPLS, Transmission-Multiprotocol Label Switching) network technology, be meant the method and system of business convergence in a kind of T-MPLS network especially.
Background technology
For the development that adapts to MAN for the demand that transmits net, International Telecommunications Union's telecommunication standards tissue (ITU-T) is with multi protocol label exchange (MPLS, Multiprotocol Label Switching) conceptual expansion of network has proposed T-MPLS in February, 2006 to lower transmission aspect in ITU-T SG15 meeting.T-MPLS is a kind of connection-oriented grouping tranmission techniques based on MPLS, and the data forwarding face of T-MPLS is the subclass of MPLS, and the data of T-MPLS are based on that the T-MPLS label transmits.T-MPLS is the application of MPLS in transmitting net, it is simplified some sophisticated functions of MPLS data forwarding face, that is: saved the processing of the Internet protocol (IP, Internet Protocol) that interconnects between the unnecessary network-oriented, operator's cost is reduced significantly; The T-MPLS network has service expansion capability completely, supports the transmission of different technologies signal, meets the trend of network transformation; Compare with traditional grouping conveying network; functions such as the connection-oriented characteristic that the T-MPLS network has, powerful Operations, Administration and Maintenance (OAM, Operation Administration and Maintenance) and protection recovery guarantee the quality requirement of operation level.
In the T-MPLS network; in the following time of network model of user side edge device (CE) dual homed operator edge device (PE); according to different node failures, business switched fast when general using T-MPLS protecting tunnel or pseudo-line (PW) protection solved network failure.It realizes that substantially principle is: set up T-MPLS tunnel and PW connection end to end between two PE equipment; and be that the active link that needs protection is set up reserve link in advance; when the PE Equipment Inspection was lost efficacy to active link; such as node failure or link failure; flow is switched on the reserve link, thereby realizes professional switching fast.Here, described node failure is meant that the fault of reserve link appears not influencing in node.
Fig. 1 is the network model of typical C E dual homed PE; in conjunction with Fig. 1; be explained in further detail based on the protecting tunnel of T-MPLS network and the method for PW protection switching services existing: in Fig. 1, PE_A is the PE of CE_B dual homed, and PE_B is the PE that is connected with CE_B with PE_C.The active link of setting CE_A visit CE_B is:
CE_A-PE_A-P_A-PE_B-CE_B；
When the link between PE_A or PE_A and the PE_B broke down, the link convergence of CE_A visit CE_B was:
CE_A-PE_A-P_B-PE_C-CE_B; Here, described PE_A breaks down and is meant that the fault of reserve link appears not influencing in PE_A.
T-MPLS protecting tunnel technology according to standard; in the data message processing procedure of reality; the forwarding of data message is to judge by inquiring about forwarding-table item earlier; which bar link decision adopts transmit then; therefore; need to dispose forwarding-table item in advance on each node, forwarding-table item configuration of the prior art is as follows:
The configuration of T-MPLS business mainly is divided into example part and two parts of T-MPLS tunnel segment, and wherein, the data message that example partly is mainly used in private user one side is linked into public network tunnel one side; Perhaps, the data message with public network tunnel one side is linked into private user one side.Wherein, the configuration of close private user one side is called client instance port (CIP, Customer Instance Port) configuration, comprises the information that the user inserts, such as interface type, and interface content etc.; Configuration near public network tunnel one side is called virtual instance port (VIP, Virtual Instance Port) configuration, comprises the information of public network label, private network tags and next jumping of tunnel in tunnel.During configuration, normally tunnel and PW are bundled on the VIP, thus private network tags, the public network label in tunnel and the information of next jumping of definite forwarding-table item.
Being configured on the node of T-MPLS tunnel, each node all is a section of tunnel, on each node, there is outlet that inlet is also arranged, but, entrance and exit is all arranged, particularly on not all node, head in the tunnel, be head node, do not enter the mouth that the inlet of disappearance is inserted by client instance and replenishes; Same, the afterbody in the tunnel, promptly tail node does not export, and the outlet of disappearance is also inserted by client instance and replenishes.On the configuration node in tunnel, configured tunneling technique protection group is protected main tunnel.Configuration PW protection group is protected main PW on the PE node.
According to above-mentioned collocation method, by of the configuration of example part with tunnel segment, the information of PE_A among Fig. 1 to PE_B and PE_A to two links of PE_C is write in the forwarding-table item of PE_A equipment, the information of described link comprises public network label, private network tags, tunnel information and PW information etc., in the data message processing procedure of reality, judge by the inquiry forwarding-table item how decision transmits then.
In network model shown in Figure 1, when the link between PE_A and the PE_B or PE_A node break down, can realize professional switching fast by the T-MPLS protecting tunnel.When the PE_B node breaks down; because the T-MPLS tunnel protects configuration to originate in the tunnel head node end to end; end at the tunnel tail node; so when PE_B broke down, the protecting tunnel group lost efficacy; at this moment; the T-MPLS protecting tunnel can't be realized professional switching fast, therefore, can realize professional switching fast by the PW protection.
When the link between PE_B and the CE_B breaks down, can only realize professional convergence by the PW protection.But, present carrier class Ethernet requires the time of business recovery normal transmission less than 50ms, because the jumping figure of business convergence speed and private network side user access number, bearer network is closely related end to end, in other words, PE_A can not learn very soon that as a rule fault has appearred in the link between PE_B and the CE_B, so in existing networking, the business convergence time can't be satisfied the demand of carrier class Ethernet less than 50ms substantially end to end.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method and system of business convergence in a kind of T-MPLS network, when link breaks down, can realize the convergence fast of professional ground, and then satisfies the requirement of carrier class Ethernet.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides the method for business convergence in a kind of T-MPLS network, this method comprises:
The port status of the PE timing scan that is connected with CE self client's access interface, and when port status is port failure, send Client Signal Fail (CSF, Customer Signal Failure) message to the PE of CE dual homed;
After the PE of described CE dual homed receives described CSF message, the main field value that whether comes into force with PW in self forwarding-table item is updated to inefficacy;
After the PE of described CE dual homed receives the data message that need send to far-end CE, send datagram according to the forwarding-table item after upgrading.
In the such scheme, the timing length of the port status of the described PE scanning that is connected with CE self client's access interface is not more than 10ms.
In the such scheme, before the port status of the described PE timing scan that is connected with CE self client's access interface, this method further comprises:
T-MPLS tunnel head node information and example information are set on the PE of described CE dual homed, on the PE that described CE connects, T-MPLS tunnel tail node information and example information are set, and on the PE of described CE dual homed, form forwarding-table item, on the PE of described CE dual homed and described and PE that CE is connected, two-way forwarding is set afterwards and detects.
In the such scheme, describedly send datagram according to the forwarding-table item after upgrading, for:
Example table in the PE inquiry forwarding-table item of described CE dual homed, finding main is when losing efficacy with whether the come into force value of field of PW, send described data message by standby PW, when sending, the PE of described CE dual homed is according to the tunnel Taoist monastic name of the carrying PW of standby PW correspondence in the example table, inquiry tunnel table according to the content of tunnel table correspondence information needed such as public network label and private network tags are encapsulated in the described data message, and the data message after will encapsulating sends to far-end CE by standby PW.
In the such scheme, this method further comprises:
Recover normal when main with PW, and the port status of the PE that connects of described CE be port just often, the PE of described CE dual homed is updated to the master in the forwarding-table item to come into force with whether the come into force value of field of PW.
In the such scheme, the port status of the described PE timing scan that is connected with CE self client's access interface, and when described port status is port failure, send the CSF message to the PE of CE dual homed, for:
The port status of the detection module timing scan client access interface of the described PE that is connected with CE, and scanning port status first when being port failure, trigger the CSF message sending module of the described PE that is connected with CE, send the CSF message by described CSF message sending module to the PE of CE dual homed, described detection module is provided with the CSF message and sends sign simultaneously;
Described CSF message sending module periodically sends the CSF message from the PE of the described CE dual homed of trend.
In the such scheme, this method further comprises:
Described detection module scan port status be port normal after, remove described CSF message and send sign, and send the notice that stops to send the CSF message to described CSF message sending module; After described CSF message sending module is received and stopped to send the notice of CSF message, stop to send the CSF message to the PE of described CE dual homed.
The present invention also provides the system of business convergence in a kind of T-MPLS network, and this system comprises: a PE and the 2nd PE; Wherein,
The one PE is used for the port status of timing scan self client access interface, and when described port status is port failure, sends the CSF message to the 2nd PE;
The 2nd PE is used for after receiving the CSF message that a PE sends, and is updated to inefficacy with main in self forwarding-table item with whether the come into force value of field of PW; And after receiving the data message that need send to far-end CE, send datagram according to the forwarding-table item after upgrading.
In the such scheme, this system further comprises the unit is set, be used on described the 2nd PE, being provided with T-MPLS tunnel head node information and example information, and T-MPLS tunnel tail node information and example information is set on a described PE, and on described the 2nd PE, form forwarding-table item, two-way forwarding is set on a described PE and described the 2nd PE afterwards detects.
In the such scheme, described the 2nd PE also is used for recovering normal when main with PW, and the port status of the PE that is connected with described CE be port just often, the master is updated to and comes into force with whether the come into force value of field of PW.
In the such scheme, a described PE further comprises: detection module and CSF message sending module; Wherein,
Detection module is used to scan the regularly port status of client's access interface, and scanning port status first when being port failure, triggers CSF message sending module, the CSF message is set simultaneously sends sign;
CSF message sending module is used for after receiving the trigger message of detection module, periodically sends the CSF message to described the 2nd PE.
In the such scheme, described detection module, also be used to scan port status and be port normal after, remove described CSF message and send sign, and send the notice that stops to send the CSF message to described CSF message sending module;
Described CSF message sending module also is used for stopping to send the CSF message to described the 2nd PE after stopping of receiving that described detection module sends sends the notice of CSF message.
The scheme of business convergence in the T-MPLS network provided by the invention, the port status of the PE timing scan that is connected with CE self client's access interface, and when described port status is port failure, send the CSF message to the PE of CE dual homed; After the PE of described CE dual homed receives described CSF message, the main field value that whether comes into force with PW in self forwarding-table item upgraded lost efficacy; After the PE of described CE dual homed receives data message, send datagram, so, when PE that connects as described CE and the link between the CE break down, can realize the quick convergence of business according to the forwarding-table item after upgrading.
In addition, the sweep spacing of the port status of the described PE scanning that is connected with CE self client's access interface is not more than 10ms, so, can satisfy the requirement of carrier class Ethernet service recovery less than 50ms, and then promote user experience.
Description of drawings
Fig. 1 is the network model of typical C E dual homed PE;
Fig. 2 is the method flow schematic diagram of business convergence in the T-MPLS network of the present invention;
Fig. 3 is the T-MPPLS configuration schematic diagram of the embodiment of the invention;
Fig. 4 is the system configuration schematic diagram of business convergence in the T-MPLS network of the present invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
In the T-MPLS network, the one CE visits the 2nd CE by active link, for more clearly each PE equipment being distinguished, in the following description, to on active link, be called the PE that is connected with CE with the direct-connected PE of described the 2nd CE, the PE of described the 2nd CE dual homed of the other end on the active link is called the PE of CE dual homed, the 2nd CE is called far-end CE.
The method of business convergence in the T-MPLS network of the present invention as shown in Figure 2, may further comprise the steps:
Step 201: the port status of the PE timing scan that is connected with CE self client's access interface, and when described port status is port failure, send the CSF message to the PE of CE dual homed;
Here, the time interval of timing scan port status is set according to user's request, when being provided with, for time of the business recovery normal transmission that satisfies the requirement of present carrier class Ethernet condition less than 50ms, require duration to be not more than 10ms, the user can be provided with duration regularly arbitrarily in 10ms, such as 0.5ms, 1ms or the like.
Described CSF content of message is specifically: notify the PE master of described CE dual homed to lose efficacy with PW.
In actual application, the port status of the PE timing scan that is connected with CE self client's access interface, and when described port status is port failure, send the CSF message to the PE of CE dual homed, be specially:
The port status of the detection module timing scan client access interface of the described PE that is connected with CE, and scanning port status first when being port failure, trigger the CSF message sending module of the described PE that is connected with CE, send the CSF message by described CSF message sending module to the PE of CE dual homed, described detection module is provided with the CSF message and sends sign simultaneously;
Described CSF message sending module is after receiving the trigger message of described detection module, can periodically send the CSF message from the PE of the described CE dual homed of trend, up to the notice that stops to send the CSF message of receiving described detection module, thinking no longer needs to send till the CSF message.Wherein, in the prior art, the cycle that described CSF message sending module sends the CSF message is usually greater than time interval of timing scan port status, generally selected for use 1 second, therefore, when described detection module scans described port status once more still for port failure, then do not need to trigger again described CSF message sending module.
Here, during the described port status that is meant the last scan client access interface before this time scanning first, port status is that port is normal.
Before execution in step 201, this method can further include:
T-MPLS tunnel head node information and example information are set on the PE of described CE dual homed, and on the PE that described CE connects, T-MPLS tunnel tail node information and example information are set, and on the PE of described CE dual homed, form forwarding-table item, on the PE of described CE dual homed and described and PE that CE is connected, two-way forwarding is set afterwards and detects; Wherein, the layoutprocedure that the detailed process of T-MPLS tunnel head node information, example information and tail node information and existing T-MPLS business are set is identical, the process and the existing forming process that form forwarding-table item are identical, regulation has the detailed process that two-way forwarding detection is set in the TMPLS OAM agreement, and detailed process and existing setting up procedure that two-way forwarding detection is set are identical.
Described forwarding-table item comprises tunnel table and example table; Wherein, described tunnel table comprises the information of public network label, next jumping of tunnel, field value that whether tunnel comes into force, and information such as protecting tunnel group; The field value whether comprise described example table private network tags, the pairing main tunnel Taoist monastic name of this private network tags, instance number, PW come into force, and information such as PW protection group.
Step 202: after the PE of described CE dual homed receives described CSF message, the main field value that whether comes into force with PW in self forwarding-table item is updated to inefficacy, execution in step 203 afterwards;
Here, the field value whether described master comes into force with PW shows main effective with PW when being effective, can use the master to send datagram with PW; The field value whether described master comes into force with PW shows main with the PW inefficacy when being inefficacy, can not use the master to send datagram with PW.
When on the PE of described CE dual homed and described and PE that CE is connected, being provided with two-way forwarding simultaneously and detecting, when the described PE that is connected with CE broke down, the PE of described CE dual homed also can be updated to inefficacy with the main field value that whether comes into force with PW in the forwarding-table item according to testing result.
Since the CSF message sending module of the described PE that is connected with CE confiscate described detection module stop to send the notice of CSF message before, can periodically send the CSF message from the PE of the described CE dual homed of trend, after the PE of described CE dual homed receives the CSF message once more, at this moment, owing to be updated to the main field value that lost efficacy with PW in the forwarding-table item, therefore, after the PE of described CE dual homed receives the CSF message once more, check and lead the field value that comes into force with PW or the field value of inefficacy in the forwarding-table item, if when being the field value that lost efficacy, then no longer upgrade forwarding-table item.
Step 203: after the PE of described CE dual homed receives the data message that need send to far-end CE, send datagram according to the forwarding-table item after upgrading.
Particularly, the example table in the PE of the described CE dual homed inquiry forwarding-table item, finding main is when losing efficacy with whether the come into force value of field of PW, sends described data message by standby PW.When sending, the PE of described CE dual homed is according to the tunnel Taoist monastic name of the carrying PW of standby PW correspondence in the example table, inquiry tunnel table, content according to tunnel table correspondence is encapsulated into information needed such as public network label and private network tags in the described data message, and the data message after will encapsulating sends to far-end CE by standby PW.
If current effective PW is the protected mode of standby PW and PW protection group is reversing mode (Revertive Mode), recover normal when main with PW, and the port status of the described PE that is connected with CE be port just often, wait for (WTR through over recovery, Wait to Recovery) after the time, the PE of described CE dual homed is updated to the master in the forwarding-table item to come into force with whether the come into force value of field of PW, after this, then sends datagram with PW by main; Wherein, the PE that described CE connects regularly detects (CC with PW to the PE of described CE dual homed transmission connectivity by main, Continuity Check) message, if the PE of described CE dual homed at the appointed time can be by the main CC message of receiving the PE transmission that described CE connects with PW, then think main and recovered normal use with PW, concrete processing procedure and existing processing procedure are identical; The port status of the described PE that is connected with CE by scanning discovery self client access interface be port normal after, then can not send the CSF message to the PE of described CE dual homed again, the PE of described CE dual homed does not receive the CSF message at the appointed time, thinks that then the port status of the PE that described CE connects is that port is normal.
Described detection module scan port status be port normal after, remove described CSF message and send sign, and send the notice that stops to send the CSF message to described CSF message sending module; After described CSF message sending module is received and stopped to send the notice of CSF message, stop to send the CSF message to the PE of described CE dual homed.
Method of the present invention can further include: CE receives the data message of the PE transmission of described CE dual homed.
Below in conjunction with embodiment the present invention is remake and to describe in further detail.
Present embodiment is based on the network model of CE dual homed PE shown in Figure 1, the application scenarios of present embodiment is: PE_A is the PE of CE_B dual homed, PE_B is the PE that is connected with CE_B with PE_C, CE_A visits CE_B, PE_A is the head node in T-MPLS tunnel, and PE_B and PE_C are the tail node in T-MPLS tunnel.
At PE_A; PE_B and PE_C go up configured tunneling technique 1 (TUNNEL1) and TUNNEL2 respectively; particularly; TUNNEL1 is PE_A-P_A-PE_B; TUNNEL2 is PE_A-P_B-PE_C-PE_B; TUNNEL1 is the main tunnel of using; TUNNEL2 is an over run tunnel, and on PE_A profile instance (SERVICE1), described SERVICE1 comprises CIP1; VIP1; wherein; bind PW1 among the VIP1; PW2, that carrying PW1 is TUNNEL1, that carrying PW2 is TUNNEL2; and configuration PW1 and PW2 formation main-apparatus protection; that is: PW1 is that the master uses PW, and PW2 is standby PW, disposes formed active-standby path to be:
TUNNEL1 carries PW1, corresponding primary link: CE_A-PE_A-P_A-PE_B-CE_B;
TUNNEL2 carries PW2, corresponding standby link: CE_A-PE_A-P_B-PE_C-CE_B.
Configuration and the configuration on the PE_A on PE_B and the PE_C are identical, repeat no more here, when all nodes all dispose finish after, then can form configuration schematic diagram as shown in Figure 3.After configuration is finished; on PE_A, form forwarding-table item, comprise field value that whether information of public network label, next jumping of tunnel, the pairing main tunnel Taoist monastic name of field value, protecting tunnel group, private network tags, this private network tags, instance number, PW that whether the tunnel comes into force come into force, and information such as PW protection group.
And two-way forwarding is set on PE_A, PE_B detects.
The port status of client's access interface of PE_B timing scan self, and when port status is port failure, send the CSF message to PE_A, notice PE_A PW1 lost efficacy; After PE_A received described CSF message, the field value whether PW1 in self forwarding-table item is come into force was updated to inefficacy.
When the PE_B node broke down, PE_A can learn that by two-way forwarding testing result the PE_B node breaks down, and learnt that the PW1 between PE_A and the PE_B lost efficacy that is:, and whether the come into force value of field of PW1 in self forwarding-table item is updated to inefficacy.
When CE_A has the data message that sends to CE_B, after PE_A receives described data message, inquire about the example table in self forwarding-table item, find PW1 and whether come into force the value of field for losing efficacy, then send described data message by PW2.When sending described data message by PW2, PE_A is according to the tunnel Taoist monastic name of the carrying PW of PW2 correspondence in the example table, be TUNNEL2, inquiry tunnel table, content according to tunnel table correspondence is encapsulated into information needed such as public network label and private network tags in the data message, that is: with the private network tags of PW2 correspondence, information needed such as the public network label of TUNNEL2 correspondence are encapsulated in the data message, data message after the encapsulation is forwarded to PE_C along the path between PE_A and the PE_C, be forwarded to CE_B according to the forwarding-table item on the PE_C again, thereby make CE_A be transmitted to the business of CE_B, realize the professional end to end quick convergence under the link failure between PE_B and the CE_B, can guarantee that the business convergence time is less than 50ms end to end simultaneously.
For realizing said method, the present invention also provides the system of business convergence in a kind of T-MPLS network, and as shown in Figure 4, this system comprises: a PE 41 and the 2nd PE 42; Wherein,
The one PE 41 is used for the port status of timing scan self client access interface, and when described port status is port failure, sends the CSF message to the 2nd PE 42;
The 2nd PE 42 is used for after receiving the CSF message that a PE 42 sends, and the main field value that whether comes into force with PW in self forwarding-table item is updated to inefficacy; And after receiving the data message that need send to far-end CE, send datagram according to the forwarding-table item after upgrading.
Wherein, this system can further include unit 43 is set, be used on described the 2nd PE 42, T-MPLS tunnel head node information and example information being set, and on a described PE 41, T-MPLS tunnel tail node information and example information are set, and on described the 2nd PE 42, form forwarding-table item, two-way forwarding is set on a described PE 41 and described the 2nd PE 42 afterwards detects.
A described PE 41 can further include: detection module and CSF message sending module; Wherein,
Detection module is used to scan the regularly port status of client's access interface, and scanning port status first when being port failure, triggers CSF message sending module, the CSF message is set simultaneously sends sign;
CSF message sending module is used for after receiving the trigger message of detection module, periodically sends the CSF message to described the 2nd PE 42.
Described the 2nd PE 42 also is used for recovering normal when main with PW, and the port status of the PE that connects of described CE be port just often, be updated to and come into force with whether the come into force value of field of PW main, send datagram with PW by main afterwards.
Described detection module, also be used to scan port status and be port normal after, remove described CSF message and send sign, and send the notice that stops to send the CSF message to described CSF message sending module;
Described CSF message sending module also is used for stopping to send the CSF messages to described the 2nd PE 42 after stopping of receiving that described detection module sends sends the notice of CSF message.
This system can further include a CE, is used to produce data message, and data message is sent to described the 2nd PE 42.
This system can further include the 2nd CE, is used to receive the data message that described the 2nd PE 42 sends.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. one kind is transmitted the method that multi protocol label exchanges business convergence in (T-MPLS) network, it is characterized in that this method comprises:
The port status of operator edge device (PE) timing scan self the client access interface that is connected with user side edge device (CE), and when port status is port failure, send Client Signal Fail (CSF) message to the PE of CE dual homed;
After the PE of described CE dual homed receives described CSF message, the main field value that whether comes into force with PW in self forwarding-table item is updated to inefficacy;
After the PE of described CE dual homed receives the data message that need send to far-end CE, send datagram according to the forwarding-table item after upgrading.
2. method according to claim 1 is characterized in that, the timing length of the port status of the described PE scanning that is connected with CE self client's access interface is not more than 10ms.
3. according to claim 1 or 2 or described method, it is characterized in that before the port status of the described PE timing scan that is connected with CE self client's access interface, this method further comprises:
T-MPLS tunnel head node information and example information are set on the PE of described CE dual homed, on the PE that described CE connects, T-MPLS tunnel tail node information and example information are set, and on the PE of described CE dual homed, form forwarding-table item, on the PE of described CE dual homed and described and PE that CE is connected, two-way forwarding is set afterwards and detects.
4. method according to claim 3 is characterized in that, describedly sends datagram according to the forwarding-table item after upgrading, for:
Example table in the PE inquiry forwarding-table item of described CE dual homed, finding main is when losing efficacy with whether the come into force value of field of PW, send described data message by standby PW, when sending, the PE of described CE dual homed is according to the tunnel Taoist monastic name of the carrying PW of standby PW correspondence in the example table, inquiry tunnel table according to the content of tunnel table correspondence information needed such as public network label and private network tags are encapsulated in the described data message, and the data message after will encapsulating sends to far-end CE by standby PW.
5. method according to claim 4 is characterized in that, this method further comprises:
Recover normal when main with PW, and the port status of the PE that connects of described CE be port just often, the PE of described CE dual homed is updated to the master in the forwarding-table item to come into force with whether the come into force value of field of PW.
6. method according to claim 1 and 2 is characterized in that, the port status of the described PE timing scan that is connected with CE self client's access interface, and when described port status is port failure, send the CSF message to the PE of CE dual homed, for:
The port status of the detection module timing scan client access interface of the described PE that is connected with CE, and scanning port status first when being port failure, trigger the CSF message sending module of the described PE that is connected with CE, send the CSF message by described CSF message sending module to the PE of CE dual homed, described detection module is provided with the CSF message and sends sign simultaneously;
Described CSF message sending module periodically sends the CSF message from the PE of the described CE dual homed of trend.
7. method according to claim 6 is characterized in that, this method further comprises:
Described detection module scan port status be port normal after, remove described CSF message and send sign, and send the notice that stops to send the CSF message to described CSF message sending module; After described CSF message sending module is received and stopped to send the notice of CSF message, stop to send the CSF message to the PE of described CE dual homed.
8. the system of business convergence in the T-MPLS network is characterized in that this system comprises: a PE and the 2nd PE; Wherein,
The one PE is used for the port status of timing scan self client access interface, and when described port status is port failure, sends the CSF message to the 2nd PE;
The 2nd PE is used for after receiving the CSF message that a PE sends, and is updated to inefficacy with main in self forwarding-table item with whether the come into force value of field of PW; And after receiving the data message that need send to far-end CE, send datagram according to the forwarding-table item after upgrading.
9. system according to claim 8, it is characterized in that, this system further comprises the unit is set, be used on described the 2nd PE, being provided with T-MPLS tunnel head node information and example information, and T-MPLS tunnel tail node information and example information is set on a described PE, and on described the 2nd PE, form forwarding-table item, two-way forwarding is set on a described PE and described the 2nd PE afterwards detects.
10. according to Claim 8 or 9 described systems, it is characterized in that described the 2nd PE also is used for recovering normal when main with PW, and the port status of the PE that is connected with described CE be port just often, the master is updated to and comes into force with whether the come into force value of field of PW.
11. according to Claim 8 or 9 described systems, it is characterized in that a described PE further comprises: detection module and CSF message sending module; Wherein,
Detection module is used to scan the regularly port status of client's access interface, and scanning port status first when being port failure, triggers CSF message sending module, the CSF message is set simultaneously sends sign;
CSF message sending module is used for after receiving the trigger message of detection module, periodically sends the CSF message to described the 2nd PE.
12. system according to claim 11 is characterized in that,
Described detection module, also be used to scan port status and be port normal after, remove described CSF message and send sign, and send the notice that stops to send the CSF message to described CSF message sending module;
Described CSF message sending module also is used for stopping to send the CSF message to described the 2nd PE after stopping of receiving that described detection module sends sends the notice of CSF message.
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