Dynamic maintenance method and device for related link circuits

A technology for maintaining devices and links, which is applied in data exchange through path configuration, digital transmission systems, electrical components, etc., and can solve the problem that business flows cannot be switched to protect backup links, etc.

Active Publication Date: 2010-07-28

ZTE CORP

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AI-Extracted Technical Summary

Problems solved by technology

In this way, among the different forwarding links that have an association relationship, there is a protection backup link B on link A on the public network tunnel. When the network is normal, it works on link A. When link A fails, the detection method of link A is fast. A fault is detected and an alarm is given immediately, and the service flow is quickly switched to link B. At this time, the d...

Abstract

The invention discloses a dynamic maintenance method for related link circuits. The method comprises the following steps: establishing a mapping relation of a determining link circuit and a determined link circuit, and generating a determining link circuit alarm when the detection configuration of the determining link circuit detects the fault of the determining link circuit; switching service flow to a backup protection link circuit; informing the detection configuration of the determined link circuit to update forwarded parameters according to the mapping relationship; and updating the own forwarded parameters through the detection configuration of the determined link circuit. The invention also discloses a dynamic maintenance device for the related link circuits. When the service flow is switched to the backup protection link circuit of the determining link circuit, the detection configuration of the determined link circuit do not give alarms, and the determined link circuit is notswitched, thereby being capable of ensuring the normal forwarded service flow on the backup protection link circuit.

Application Domain

Networks interconnection

Technology Topic

Service flowDynamic maintenance +2

Image

Examples

Experimental program(2)

Example Embodiment

[0064] Example 1: In such figure 1 In the topology shown, the dynamic maintenance method for the associated link in this embodiment is as follows: Figure 4 As shown, the method includes the following steps:

[0065] Step 401: Establish a mapping relationship between the determined link and the determined link detection configuration;

[0066] Specifically, the CE1 node connects to the CE2 node through the PE1 node, and first establishes the tunnel PE1-P2-PE3 as the main tunnel link, that is, determines the link, and configures the protection backup tunnel PE1-P4-PE3, also known as the link As a protection backup link; then configure its associated pseudowire link PW1 on the decision link PE1-P2-PE3, which is the decided link.

[0067] On the PE1 and PE3 nodes, set the detection configuration on the determined link PE1-P2-PE3 as the detection configuration of the BFD method, which is BFD session 1, used to detect the failure of the primary tunnel; set the determined link on PW1 The detection configuration of is also the detection configuration of the BFD method, which is BFD session 2, which is used to detect the failure of the determined link PW1. The forwarding parameter in BFD session 2 is the parameter that determines the link PE1-P2-PE3; establishment decision The mapping relationship between the link PE1-P2-PE3 and the determined link PW1 detection configuration is specifically: setting BFD session 1 to correspond to BFD session 2. It should be noted that the tunnels in this embodiment are all RSVP-TE tunnels, and may also be MPLS LDP tunnels.

[0068] In this step, it further includes not configuring the protection backup link PE1-P4-PE3 of the decision link;

[0069] Further, it also includes configuring the tunnel PE1-P4-PE5, and then configuring the pseudowire link PW2 associated with the tunnel on the tunnel, and configuring PW2 as the protection backup link of PW1; configuring the access node CE1 to connect through PW1 and PW2 dual regulation Enter CE2 to make communication normal.

[0070] Step 402: When the PE1 and PE3 nodes detect the decision link failure in the BFD session 1, they generate a decision link alarm, and judge whether the decision link has a protection backup link, if so, go to step 403; if not, go to Step 404;

[0071] Step 403: The PE1 and PE3 nodes immediately switch the service flow to the protection backup link PE1-P4-PE3, and notify the BFD session 2 to update according to the mapping relationship between the determination link PE1-P2-PE3 and the determined link PW1 detection configuration Forwarding parameters: After receiving the notification, BFD session 2 updates its own forwarding parameters and ends the processing flow;

[0072] Specifically, the PE1 and PE3 nodes immediately switch the service flow to the protection backup link PE1-P4-PE3, and at the same time, the BFD session 1 according to the corresponding BFD session 2, notifies the BFD session 2 to update the forwarding parameters; after receiving the notification, BFD Session 2 updates its own forwarding parameters and ends the processing flow;

[0073] The BFD session 2 updates its own forwarding parameters specifically as follows: BFD session 2 updates the forwarding parameters according to the parameters of the protection backup link PE1-P4-PE3 switched to, and changes the original decision link PE1-P2- in the forwarding parameters. The parameters of PE3 are updated to the parameters of the protection backup link PE1-P4-PE3.

[0074] Step 404: PE1 and PE3 nodes do not perform link switching operations, BFD session 1 does not notify BFD session 2 to update, and an alarm is issued when BFD session 2 detects that the determined link PW1 fails;

[0075] Further, when the determined link PW1 has a protection backup link PW2, in this step, when the BFD session 2 detects the failure of the determined link PW1, the PE1 node will switch the determined link PW1 to the protection backup link. According to the protection backup link PW2 described in step 401, the tunnel PE1-P4-PE5 is associated with the tunnel PE1-P4-PE5, and the service flow is switched to the tunnel PE1-P4-PE5 to ensure normal communication between CE1 and CE2.

Example Embodiment

[0076] Embodiment 2: In such Figure 5 In the topology shown, the dynamic maintenance method of the associated link in this embodiment is as follows: Image 6 As shown, the method includes the following steps:

[0077] Step 601: Establish a mapping relationship between the determined link and the determined link detection configuration;

[0078] Specifically, the CE1 node accesses the CE2 node through the PE1 node dual-plan, first establish the tunnel PE1-P2-PE3 as the main tunnel link, that is, determine the link, and configure the protection backup tunnel PE1-P4-PE3, also known as the link As a protection backup link; configure the associated pseudowire link PW1 on the decision link PE1-P2-PE3, which is the decided link.

[0079] Set the detection configuration on the determined link PE1-P2-PE3 as the detection configuration of the TMPLS-OAM method, which is TMPLS-OAM session 1, used to detect the failure of the main tunnel; set the detection configuration on the determined link PW1 It is also the detection configuration of the TMPLS-OAM method, which is TMPLS-OAM session 2, which is used to detect the failure of the determined link PW1. The forwarding parameter in TMPLS-OAM session 2 is the parameter that determines the link PE1-P2-PE3 Establish a mapping relationship between the detection configuration of the determined link PE1-P2-PE3 and the determined link PW1, namely: set TMPLS-OAM session 1 to correspond to TMPLS-OAM session 2. It should be noted that the tunnels in this embodiment are all TMPLS tunnels.

[0080] In this step, it further includes not configuring the protection backup link PE1-P4-PE3 of the decision link;

[0081] Further, it also includes configuring the tunnel PE1-P5-PE6, and then configuring the pseudowire link PW2 associated with it on the tunnel, and configuring PW2 as the protection backup link of PW1; configuring the access node CE1 to connect through PW1 and PW2 Enter CE2 to make communication normal.

[0082] Step 602: When the PE1 and PE3 nodes detect the decision link failure in the TMPLS-OAM session 1, they generate a decision link alarm and judge whether the decision link has a protection backup link. If so, go to step 603; if not, then Go to step 604;

[0083] Step 603: The PE1 and PE3 nodes immediately switch the service flow to the protection backup link PE1-P4-PE3, and at the same time notify the TMPLS-OAM session according to the mapping relationship between the determined link PE1-P2-PE3 and the determined link PW1 detection configuration 2 Update the forwarding parameters; after receiving the notification, TMPLS-OAM session 2 updates its own forwarding parameters and ends the processing flow;

[0084] Specifically, the PE1 and PE3 nodes immediately switch the service flow to the protection backup link PE1-P4-PE3, and at the same time, the TMPLS-OAM session 1 according to the corresponding TMPLS-OAM session 2, notifies the TMPLS-OAM session 2 to update the forwarding parameters; After receiving the notification, TMPLS-OAM session 2 updates its own forwarding parameters and ends the processing flow;

[0085] The updating of the forwarding parameters of TMPLS-OAM session 2 is specifically: TMPLS-OAM session 2 updates the forwarding parameters according to the parameters of the protection backup link PE1-P4-PE3 switched to, and changes the original decision chain in the forwarding parameters The parameters of PE1-P2-PE3 are updated to the parameters of the protection backup link PE1-P4-PE3.

[0086] Step 604: PE1 and PE3 nodes do not perform link switching operations, TMPLS-OAM session 1 does not notify TMPLS-OAM session 2 to update, and an alarm is issued when TMPLS-OAM session 2 detects the failure of the determined link PW1;

[0087] Further, when the determined link PW1 has a protection backup link PW2, in this step, when the TMPLS-OAM session 2 detects the failure of the determined link PW1, the PE1 node will switch the determined link PW1 to protection. On the backup link PW2, and the protection backup link PW2 is associated with the tunnel PE1-P5-PE6 according to step 601, the service flow is switched to the tunnel PE1-P5-PE6 to ensure normal communication between CE1 and CE2.

PUM

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