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Message forwarding method and device thereof

A message forwarding and message technology, applied in the field of communication, can solve problems such as the inability to realize the combination of segment routing network and MTR function

Inactive Publication Date: 2018-03-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a message forwarding method and device to at least solve the problem in the related art that the combination of the segment routing network and the MTR function cannot be realized

Method used

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  • Message forwarding method and device thereof
  • Message forwarding method and device thereof

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specific Embodiment 1

[0074] This embodiment will describe the forwarding process of the MRT path whose destination prefix is ​​within the MRT Island. image 3 is a network topology diagram according to the first embodiment of the present invention, such as image 3 As shown, OSPF is running in the network, all nodes are in the same area, and the segment routing function and the MRTProfile defined in the above-mentioned embodiments of the present invention are enabled under the corresponding OSPF instance. S serves as the source node to establish an MRT path to the prefix of the destination node D, and then protects the SPF main path based on the MRT path. Including the following steps:

[0075] In step S301, the OSPF instance on each node S, A, B, and D enables SR and the MRT Profile defined in the embodiment of the present invention, and then they form an MRT Island in the area. And since the MRTSR-LSP based on multi-prefix-sid tunneling Option is specified in the MRT Profile as the forwarding ...

specific Embodiment 2

[0129] This embodiment will describe the forwarding process of the MRT path whose destination prefix is ​​outside the MRT Island. Figure 4 is a network topology diagram according to the second embodiment of the present invention, such as Figure 4 As shown, OSPF is running in the network, including two areas, and all nodes enable the segment routing function under the corresponding OSPF instance, wherein S, A, B, and C in area1 enable the defined in the embodiment of the present invention MRT Profile. S serves as the source node to establish an MRT path to the prefix of the destination node D, and then protects the SPF main path based on the MRT path. Including the following steps:

[0130] In step S401, SR is enabled under the OSPF instances of all nodes in area1 and area2. Each node allocates SRGB.

[0131] In step S402, the OSPF instances on nodes S, A, B, and C in area1 enable the MRT Profile defined in the embodiment of the present invention, and they form an MRT Isl...

specific Embodiment 3

[0174] This embodiment will describe the forwarding process of the MRT path whose destination prefix is ​​outside the MRT Island, especially how to implement the cross-domain forwarding rules defined in RFC7812 based on SR-LSP. Figure 5 is the network topology diagram according to the third embodiment of the present invention, such as Figure 5 As shown, OSPF is running in the network, including two areas, and all nodes enable the segment routing function under the corresponding OSPF instance, wherein S, A, B, and C in area1 enable the defined in the embodiment of the present invention MRT Profile, B, E, D, and F in area2 also enable the MRT Profile defined in the embodiment of the present invention. S serves as the source node to establish an MRT path to the prefix of the destination node D, and then protects the SPF main path based on the MRT path. Including the following steps:

[0175] In step S501, SR is enabled under the OSPF instances of all nodes in area1 and area2....

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Abstract

The invention provides a message forwarding method and a device thereof. The message forwarding method comprises the steps of receiving a to-be-forwarded message by a first node, wherein the target address of the message is a second node; searching a target topology which corresponds with the message in a pre-generated topology, wherein the pre-generated topology comprises a first topology and a second topology which are generated according to an MRT algorithm, and a third topology which is obtained according to an SPF algorithm, wherein the first topology, the second topology and the third topology are different from one another; and searching a next hop node for forwarding to the second node in the target topology by the first node, and forwarding the message to the next hop node based on a preset forwarding mechanism, wherein the preset forwarding mechanism utilizes a segmented routing forwarding mechanism based on a tunnel nesting mode of every topology every prefix-sid. The message forwarding method and the device thereof realize a purpose of combining the segmented routing network and the MTR function.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a message forwarding method and device. Background technique [0002] Maximally Redundant Trees (MRT for short) Fast Re-Route (FRR for short) is a relatively new FRR technology, which uses two maximum different forwarding topologies for single Point of link or node failure can provide 100% protection. The MRT architecture defines two forwarding mechanisms, namely, the Label Distribution Protocol (Label Distribution Protocol, LDP for short) forwarding mechanism and the network protocol-tunnel (IP-tunnel) forwarding mechanism. The LDP forwarding mechanism uses different labels to distinguish between the default topology forwarding behavior and the MRT forwarding behavior, so that the forwarding plane can support MRT-FRR without any upgrade. The IP-tunnel forwarding mechanism needs to waste a dedicated MRT loopback address to support forwarding, which also enables the forwarding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/707H04L12/721H04L12/723H04L12/46H04L45/24H04L45/50
CPCH04L12/4633H04L45/12H04L45/22H04L45/50
Inventor 彭少富
Owner ZTE CORP
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