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Tag structure and tag message forwarding method and device

A technology of message forwarding and label forwarding table, applied in the field of label construction and label message forwarding method and device

Active Publication Date: 2016-08-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a label structure and a label message forwarding method and device to at least solve the problems in the related art that the hardware of the forwarding plane needs to be upgraded to support deeper label stack processing capabilities, the problem of load efficiency and the problem of MTU

Method used

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  • Tag structure and tag message forwarding method and device
  • Tag structure and tag message forwarding method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0207] Figure 10 It is a structural diagram of explicit routing in the SR network according to Embodiment 1 of the present invention, such as Figure 10 As shown, the next hop of the shortest path from R0 to R1 is node A1, the next hop of the shortest path from R1 to R2 is node A2, the next hop of the shortest path from R2 to R3 is node A3, and the end-to-end tunnel designation between R0 and R3 Through R1, R2 and R3 nodes, R0 is the ingress node, and the traffic binding segment list on R0 can be configured by itself or delivered by the centralized device of the controller. The segment list for traffic binding can be: , which is a list that can identify node information, such as ip address list, global label list, index list; the segment list for traffic binding can also be a list that can directly Out label stack for headers . The segment list can be recorded as SL1, and the controller also allocates a segmentid for SL1, assuming it is 300. This SID allocated for the segm...

Embodiment 2

[0239] Figure 21 is a flow chart of explicit routing in the SR network according to Embodiment 2 of the present invention, such as Figure 21 shown, including:

[0240] In step S2102, the controller notifies the segment list and SL-SID300 information to the ingress nodes in the list through the southbound interface protocol.

[0241] Wherein, the southbound interface protocol may be BGP-LS or PCEP. The controller has a BGP-LS or PCEP neighbor relationship with each node in the SR domain. The controller carries the segment list and SL-SID300 by extending the new message in BGP-LS or PCEP, and sends it to the ingress node in the list. Here, we can define a new message as: SR-LIST Segment ID allocation msg. BGP-LS or PCEP can carry segment list and SL-SID300 information through an SR-LIST Segment ID allocation msg, and send it to the ingress node in the list.

[0242] Step S2104, the ingress node notifies all nodes in the SR domain of the segment list and SL-SID30...

Embodiment 3

[0246] In this embodiment, the controller notifies each node contained in the segment list of a revocation message to revoke the previously announced segment list and SL-SID300, and a new revocation message can be defined It is SR-LIST Segment ID revocation msg. Figure 22 is a flow chart of explicit routing in the SR network according to Embodiment 3 of the present invention, such as Figure 22 shown, including:

[0247] In step S2202, the controller sends the segment list and SL-SID300 sent to each node and ingress node included in the list before revoking through the southbound interface protocol.

[0248] Wherein, the southbound interface protocol may be BGP-LS or PCEP. The controller has a BGP-LS or PCEP neighbor relationship with each node in the SR domain. In the present invention, the controller revokes the segment list and SL-SID300 previously sent to each node contained in the list through the extended BGP-LS or PCEP revocation message. BGP-LS can revoke...

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Abstract

The invention provides a tag structure and a tag message forwarding method and device. The method comprises: a node receives a message which carries a segment list and a segment list ID for marking the segment list; the node builds a tag forwarding list according to the segment list and the segment list ID and carries out forwarding according to the tag forwarding list; and / or the node maintains the mapping relation between the segment list and the segment list ID. The method and the device solve the problem in the prior art that forwarding surface hardware needs upgrade to support processing of deeper tag stacks and the problems of load efficiency and MTU, so that the requirement of tag stack processing capability of the forwarding surface hardware is reduced, and the problems of load efficiency and MTU are effectively solved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a label structure and a label message forwarding method and device. Background technique [0002] A typical service bearer network may include a Customer Edge (CE for short) router, a Provider Edge (PE for short) router, a backbone router for a provider, and a Route Reflecter (RR for short). The Open Shortest Path First (OSPF) protocol / Intermediate System to Intermediate System Routing Protocol (IS-IS) is usually used as the Interior Gateway Protocol (IS-IS). Protocol, referred to as IGP), adopts BGP-4 Multi-Protocol Extended Border Gateway Protocol (MP-BGP, where BGP is Border Gateway Protocol) to transmit virtual private network (Virtual Private Network, referred to as VPN) information, and uses Label Distribution Protocol (LabelDistribution Protocol (LDP for short) distributes labels and adopts Resource Reservation Protocol-Traffic Engineering (RSVP-TE for short) based on tr...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L45/50H04L45/74H04L47/724
CPCH04L45/34H04L45/64H04L45/50H04L45/507H04L45/54H04L47/724
Inventor 彭少富陈然廖婷
Owner ZTE CORP
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