Using Ping to Monitor Link Connectivity on a VLL Network

Procedure

1. Run the following commands as network requirements:

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

     ping vc vpn-instance vpn-name local-ce-id remote-ce-id [ -c echo-number | -m time-value | -s data-bytes | -t timeout-value | -v | -g ] * control-word

   • To check connectivity of the VLL network through the MPLS Router Alert channel, run:

     ping vc vpn-instance vpn-name local-ce-id remote-ce-id [ -c echo-number | -m time-value | -s data-bytes | -t timeout-value | -v | -g ] * label-alert

   The following shows an example:

   <HUAWEI> ping vc vpn-instance vpn1 1 2 -v label-alert 
   PW PING : FEC 128 PSEUDOWIRE (NEW). Type = vlan, ID = 100 : 100 data bytes, press CTRL_C to break
        Reply from 4.4.4.4: bytes=100 Sequence=1 time = 110 ms Return Code 3, Subcode 1
        Reply from 4.4.4.4: bytes=100 Sequence=2 time = 90 ms Return Code 3, Subcode 1
        Reply from 4.4.4.4: bytes=100 Sequence=3 time = 60 ms Return Code 3, Subcode 1
        Reply from 4.4.4.4: bytes=100 Sequence=4 time = 60 ms Return Code 3, Subcode 1
        Reply from 4.4.4.4: bytes=100 Sequence=5 time = 90 ms Return Code 3, Subcode 1
       --- FEC: L2 VPN ENDPOINT. Sender VEID = 1, Remote VEID = 2 ping statistics ---
        5 packet(s) transmitted
        5 packet(s) received
        0.00% packet loss
        round-trip min/avg/max = 60/82/110 ms 

   Before using the ping 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.

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

   The following information is displayed in the ping vc vpn-instance command output:

   • Information about responses to each Echo Request packet is displayed, including the number of bytes, sequence number, sending time of the Echo Reply packet. If no Echo Reply packet is received within a certain period, a message of "Request time out" is displayed.

   • Statistics are displayed, including the number of the sent Echo Request packets, number of the received Echo Reply packets, percentage of the Echo Request packets that are not replied, and the minimum, maximum and average delay time of sending Echo Reply packets.