Huawei Quidway S9300

That is, two VCCV ping operations cannot be performed on the same device
simultaneously.
l The MTU of a VC is not checked.
l The VCCV ping operation is not supported by the RSVP PW.
For an MH-PW, you need to specify the local VC ID and VC type. For the CW mode, if VC IDs
are different, you need to specify the VC ID of the remote U-PE. For label alert mode, you need
to specify the IP addresses of the peer S-PEs or U-PEs.
To perform the VCCV ping operation on the static PW, you must specify the VC IDs. A static
PW does not support signaling negotiation; therefore, the configurations of the U-PE CW on
both ends of the PW are different. The CW function is enabled on one end, but disabled on the
other end. When the label alert mode is enabled on both the ends, the PW can be Up and the
ping vc command can work. The CEs, however, cannot communicate with each other because
the CWs are different.
5.10.2 Locating a Fault of a PW
Context
To locate a fault of a PW, you need to configure the basic PWE3 functions through a PW
template, and then run the following commands on U-PEs.
Procedure
Step 1 Run:
system-view
The system view of the U-PE is displayed.
Step 2 Run:
pw-template pw-template-name
The PW template view is displayed.
Step 3 Run:
control-word
The CW function is enabled.
Step 4 Run:
vccv cc { alert | cw }
*
cv lsp-ping
The detection for PW connectivity is enabled.
Step 5 Collect information about each LSR along the PW and information about the egress PE.
l tracert vc { encapsulation pw-id [ -exp exp-value | -f first-ttl | -m max-ttl | -r reply-mode | -
t timeout-value ]
*
control-word [ remote remote-pw-id ] } [ full-lsp-path ]
l tracert vc { encapsulation pw-id [ -exp exp-value | -f first-ttl | -m max-ttl | -r reply-mode | -
t timeout-value ]
*
label-alert [ remote remote-ip-address ] } [ full-lsp-path ]
l tracert vc {encapsulation pw-id [ -exp exp-value | -f first-ttl | -m max-ttl | -r reply-mode | -
t timeout-value ]
*
normal [ remote remote-ip-address ] } [ full-lsp-path ]
To verify the connectivity of a PW in CW mode, you need to run the vccv cc cw cv lsp-ping
command on PW templates of the two U-PEs at both ends of the PW. Similarly, to verify the
Quidway S9300 Terabit Routing Switch
Configuration Guide - VPN 5 PWE3 Configuration
Issue 03 (2009-08-20) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5-35