Configuring The Lsp Trace Test; Establishing The Configuration Task - Huawei Quidway S5700 Series Configuration Manual - Network Management

Quidway S5700 Series Ethernet Switches
Configuration Guide - Network Management

6.17 Configuring the LSP Trace Test

This section describes how to configure an LSP trace test to check the connectivity between
Label Switching Routers (LSRs) along the LSP.

6.17.1 Establishing the Configuration Task

Before configuring an LSP traceroute test, familiarize yourself with the applicable environment,
complete the pre-configuration tasks, and obtain the required data. This can help you complete
the configuration task quickly and accurately.
Applicable Environment
The NQA LSP Traceroute test can be used to test the tunnel nodes of the following types of
LSPs and collect statistics about LSA.
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After the test parameters are configured and the test is started,
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Pre-configuration Tasks
Before configuring the LSP Traceroute test, you need the following configuration:
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Data Preparation
To configure the LSP Traceroute test, you need the following data.
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Issue 01 (2011-10-26)
LSP tunnels
NQA creates the UDP MPLS Echo-Request packet, adds the address 127/8 to the IP header
as the destination IP address, and searches the related LSP.
Echo Request packets should contain Downstream Mapping Tag, Length, Value (TLV)
that carries the information about the downstream node of the current LSP node, such as
the IP address of the next hop and the outgoing label.
For the MPLS TE tunnel, you can specify a tunnel interface for sending the MPLS Echo-
Request packet so that the related Constraint-based Routed Label Switched Path (CR-LSP)
can be obtained.
The TTL value of the first Traceroute Echo-Request packet is 1. The packet is forwarded
along with the specified LSP in the MPLS network. An MPLS Echo-Reply packet is
returned if the TTL value times out.
The sender continues to send Echo-Request packets with the gradually increased TTL
value. When all Label Switching Routers (LSRs) along the LSP return Echo packets, the
Traceroute process is completed.
The sender collects the test results based on the received Echo packets.
LSP tunnel
Data
Administrator name and test name
For the LSP tunnel: destination IP address and mask of the LSP Jitter test
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