Configuring The Lsp Trace Test; Establishing The Configuration Task - Huawei S9300 Configuration Manual

S9300&S9300E Terabit Routing Switch
Configuration Guide - Network Management
Min Positive SD:1
Positive SD Number:12
Positive SD Square Sum:495
Max Negative SD:22
Negative SD Sum:34
Packet Loss Unknown:0
jitter out value:0.8977973
TimeStamp unit: ms

6.18 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.

6.18.1 Establishing the Configuration Task

Before configuring an LSP Trace 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 Trace 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 Trace test, you need the following configuration:
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Issue 01 (2012-03-15)
LSP tunnels
MPLS TE tunnels
MPLS CR-LSP hotstandby tunnels
NQA creates the UDP MPLS Echo-Request packet, adds the address 127.0.0.0/8 to the IP
packet 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 Trace 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
Trace process is completed.
The sender collects the test results based on the received Echo packets.
LSP tunnel
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Max Positive SD:22
Positive SD Sum:33
Min Negative SD:1
Negative SD Number:12
Negative SD Square Sum:498
Average of Jitter SD:2
Packet Loss Ratio: 0%
6 NQA Configuration
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