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A method and node for implementing path detection

A detection node and path detection technology, applied in the field of network communication, can solve the problems that cannot be solved, the detection node cannot reply to the head node detection response message, etc., to achieve the effect of improving the success rate

Inactive Publication Date: 2017-05-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The IETF draft draft-ietf-mpls-interas-lspping-00 describes a method of mechanically recording ASBR (Autonomous System Boundary Router) to solve the LSP across AS, and ASBR controls the routing distribution between different AS scenarios. In the case where the detection node cannot reply the detection response message of the head node
However, for the more common scenario where the detection node does not have a reachable route to the head node, this solution cannot solve

Method used

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  • A method and node for implementing path detection
  • A method and node for implementing path detection
  • A method and node for implementing path detection

Examples

Experimental program
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Embodiment 1

[0071] Such as Figure 4 As shown, nodes a, b, c, and d form an LSP across routing areas. Head node a and nodes c and d are in different routing areas. Node b acts as the ABR (area border node) of the two areas and controls the two The isolation of routing information in two areas, that is, a and c in different areas, and there is no reachable routing information between a and d.

[0072] In this example, Figure 4 All nodes on the LSP are nodes with the traceroute function described in this paper. The traceroute process is as Figure 5 shown, including the following steps:

[0073] Step 201: head node a sends an LSP traceroute request, that is, an echo request message, and the carried address group only contains its own routable address, and the LSP label TTL is set to 1;

[0074] Step 202: Node b processes the echo request message, sequentially checks whether the addresses in the address group are reachable, finds that the first address information, that is, the address ...

Embodiment 2

[0086] This embodiment still takes Figure 4 The LSP shown is taken as an example for illustration. The difference from Embodiment 1 is that node c in this embodiment does not have the traceroute function described herein. The traceroute process is as follows Image 6 shown, including the following steps:

[0087] Step 301: head node a sends an echo request message, the address group carried only contains its own routable address, and the LSP label TTL is set to 1;

[0088] Step 302: Node b processes the echo request message, sequentially checks whether the addresses in the address group are reachable, finds that there is a reachable route to the head node a, replies the echo reply to a, and adds this address group to the address group carried by the echo reply address of the node;

[0089] Step 303: Head node a receives the echo reply message sent by node b, and copies the address group therein to the echo request sent next time; sends the echo request message, and the LSP...

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Abstract

The invention discloses a path detection realization method and a node, which can complete the path detection more flexibly and quickly. The method includes: the initiating node sends a response request message to the detection node, which carries address list information, and the address list information includes the address of the initiating node; the detection node checks the node in the address list information carried in the received response request message Whether the address is reachable, the found reachable address is used as the destination address of the response message; the detection node adds the address information of the node to the address list information, and carries it in the response message. The node includes a request message sending module, a search module and a reply module. When the node does not have a reachable route to the head node, it can find other nodes on the LSP that the message passes through through the address list information carried in the response request message, and pass the response message to the initiating node through relay, improving Success rate of traceroute.

Description

technical field [0001] The invention relates to network communication technology, in particular to a method and nodes for realizing path detection in a network based on MPLS technology. Background technique [0002] MPLS (Multi-Protocol Label Switching) LSP (Label Switching Path) Ping technology, as an effective OAM (Operation Administration and Maintenance, operation management and maintenance) technology, can realize the connectivity detection of service forwarding paths and hop-by-hop fault location. And it can check the consistency of the control plane and the data plane. [0003] In the Internet Engineering Task Force (IETF, The Internet Engineering Task Force) RFC4379, the MPLS LSP Ping technology is described in detail: the echorequest (response request) message is sent along the forwarding path of the service through the head node, and the detection on the LSP The node processes and returns an echo reply (response response) message to implement connectivity detectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26H04L12/723H04L45/50
CPCH04L43/0811H04L43/10
Inventor 郑直焦欣文金利忠
Owner ZTE CORP