ping vc vpn-instance

Function

The ping vc vpn-instance command detects the status of a PW and locates the faulty node when a PW goes Down.

Format

ping vc vpn-instance vpn-name local-ce-id remote-ce-id [ -c echo-number | -m time-value | -s data-bytes | -t timeout-value | -exp exp-value | -r reply-mode | -v ] ^* { label-alert [ no-control-word ] | control-word }

Parameters

Parameter	Description	Value
vpn-instance vpn-name	Specifies the VPN name.	The value is an existing VPN instance name.
local-ce-id	Specifies the ID of the local CE.	The value is a decimal integer ranging from 0 to 249.
remote-ce-id	Specifies the ID of the local CE.	The value is a decimal integer ranging from 0 to 249.
-c echo-number	Specifies the number of the sent Echo Request packets.	The value is a decimal integer that ranges from 1 to 4294967295. The default value is 5.
-m time-value	Indicates the interval for sending Echo Request packets.	The value is a decimal integer that ranges from 1 to 10000, in milliseconds. By default, the value is 2000.
-s data-bytes	Specifies the number of bytes of an Echo Request packet.	The value is a decimal integer ranging from 65 to 8100. By default, the value is 100.
-t timeout-value	Specifies the timeout period for sending Echo Request packets.	The value is a decimal integer ranging from 0 to 65535. By default, the value is 2000.
-exp exp-value	Specifies the EXP value in an outer label in an Echo Request packet.	The value is an integer ranging from 0 to 7.
-r reply-mode	Specifies the mode of sending Echo Reply packets. The meaning of each value is as follows: 1: indicates no reply. 2: indicates a reply with an IPv4 or IPv6 UDP datagram. 3: indicates a reply with an IPv4 or IPv6 datagram carrying an MPLS router alert label. 4: indicates a reply through the control channel of the application plane.	The value is a decimal integer ranging from 1 to 4. By default, the value is 2.
-v	Displays detailed information.	-
label-alert	Indicates that in the case of a multi-hop PW, ping packets are forcibly sent on the transit node. In Label Alert mode, you can ping all transit nodes of a PW.	-
no-control-word	Disables the control word mode.	-
control-word	Indicates that in the case of a multi-hop PW, ping packets are forwarded without being resolved. In the control word mode, you can ping only the egress of the PW. The ping in control word mode can be performed only after the control word of a PW is enabled.	-

Views

All views

Default Level

0: Visit level

Usage Guidelines

If the control-word is enabled for a PW, it is recommended that you specify the control-word parameter to detect the connectivity of the PW. This ensures that ping packets are transmitted in the same manner as data packets on the PW.

Example

# Run the ping vc vpn-instance command in label-alert mode on the PE to detect the connectivity of the Kompella PW.

<HUAWEI> ping vc vpn-instance vpn1 1 2 -v label-alert
    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

**Table 1** Description of the ping vc vpn-instance command output
Item	Description
Reply from	IP address of the Echo Reply packet
bytes	Length of the Echo Reply packet
sequence	Sequence number of the Echo Reply packet
return code	Return code of the Echo Reply packet: 1: Malformed echo request received 2: One or more of the TLVs was not understood 3: Replying router is an egress for the FEC at stack-depth 4: Replying router has no mapping for the FEC at stack-depth 5: Downstream Mapping Mismatch 6: Upstream Interface Index Unknown 7: Reserved 8: Label switched at stack-depth 9: Label switched but no MPLS forwarding at stack-depth 10: Mapping for this FEC is not the given label at stack-depth 11: No label entry at stack-depth 12: Protocol not associated with interface at FEC stack-depth 13: Premature termination of ping due to label stack shrinking to a single label
Subcode	Subcode of the Echo Reply packet (indicating the depth of the label stack in the packet)
FEC	FEC TLV type (L2 VPN ENDPOINT indicates the Kompella PW that is negotiated by BGP)
Sender VEID	ID of the local CE
Remote VEID	ID of the remote CE