Using Tracert to Test the Forwarding Path on a VLL Network

This section describes how to check the communication among PEs on a VLL network through the tracert operation.

Context

Perform the following steps on the PE of the BGP VLL network to check connectivity:

Procedure

Run any of the following commands as required:

To check connectivity of the VLL network through the control word channel, run:

tracert vc -vpn-instance vpn-name local-ce-id remote-ce-id [ -exp exp-value | -f first-ttl | -m max-ttl | -r reply-mode | -t timeout-value | -g ] * control-word [ full-lsp-path ]

To check connectivity of the VLL network through the label alert channel, run:

tracert vc -vpn-instance vpn-name local-ce-id remote-ce-id [ -exp exp-value | -f first-ttl | -m max-ttl | -r reply-mode | -t timeout-value | -g ] * label-alert [ full-lsp-path ]

To check connectivity of the VLL network through the ordinary channel, run:

tracert vc pw-type pw-id [ -exp exp-value | -f first-ttl | -m max-ttl | -r reply-mode | -t timeout-value | -g ] * normal [ remote remote-ip-address ] } [ full-lsp-path ]

The following shows an example:

<HUAWEI> tracert vc -vpn-instance vpn1 1 2 label-alert full-lsp-path
TTL   Replier            Time    Type      Downstream   
0                                Ingress   10.2.2.2/[21505 1026 ]   
1     10.2.2.2           60 ms   Transit   10.3.3.3/[1026 ]   
2     10.3.3.3           50 ms   Transit   10.4.4.4/[3 ]   
3     10.1.1.1           70 ms   Egress

Before using the tracert vc -vpn-instance command to check connectivity of a VLL network, you must configure as follows:

Configure the BGP VLL network correctly.
If the control word channel is used, run the control-word command in the PW template view to enable the control word function.

The control word channel and the ordinary mode cannot be configured together.

For detailed information about each parameter and its description in the tracert vc -vpn-instance command, refer to the HUAWEI NetEngine 8000 F Series Router Command Reference.