Message forwarding method and device

A technology of message forwarding and message, applied in the field of communication, can solve the problem that the combination of segment routing network and MTR function cannot be realized.

Inactive Publication Date: 2018-02-13
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

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specific Embodiment 1

[0082] This embodiment will describe the forwarding process of the MRT path whose destination prefix is ​​within the MRT Island. Figure 5 is a network topology diagram according to the first embodiment of the present invention, such as Figure 5 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 embodiment 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:

[0083] In step S501, the OSPF instances on nodes S, A, B, and D enable SR and the MRTProfile defined in the embodiment of the present invention, and then they form an MRT Island in the area. And because the MRT SR-LSP based on multi-SRGB tunneling Option is specified in the MRT Profile as the forwarding mechanism, each node al...

specific Embodiment 2

[0138] This embodiment will describe the forwarding process of the MRT path whose destination prefix is ​​outside the MRT Island. Image 6 is the network topology diagram according to the second embodiment of the present invention, such as Image 6As 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:

[0139] In step S601, SR is enabled under the OSPF instances of all nodes in area1 and area2.

[0140] In step S602, 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 Island in area1. And because M...

specific Embodiment 3

[0183] 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 7 It is a network topology diagram according to the third embodiment of the present invention; as Figure 7 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:

[0184] In step S701, 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 device. The method comprises the steps that a first node receives a to-be-forwarded message, wherein a destination address of the message is a second node; the first node searches a target topology corresponding to the message from pre-generated topologies, wherein the pre-generated topologies comprise a first topology and a second topology generated according to a maximum redundant tree MRT algorithm, and a third topology obtained according to a shortest path first SPF algorithm, and the first topology, the second topology and the third topology are different; and the first node searches a next hop node for forwarding the message to the second node from the target topology and forwards the message to the next hop node. Through application of the method and the device, the purpose of combining a segment routing network and an MTR function is achieved.

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): H04L12/703H04L12/741H04L12/751H04L45/28H04L45/02H04L45/74
CPCH04L45/02H04L45/28H04L45/74
Inventor 彭少富
Owner ZTE CORP
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