Specifications

ping mpls
MP-390
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
Building configuration...
Current configuration : 129 bytes
!
interface Ethernet2/0
no ip address
no ip directed-broadcast
no cdp enable
xconnect 10.131.191.252 333 pw-class test1
end
Router# show ru
nning-config | begin pseudowire
pseudowire-class test1
encapsulation mpls
preferred-path interface Tunnel0
!
In such cases, you can use an LSP ping to verify the connectivity of the LSP that a certain pseudowire
is taking, be it LDP based or a TE tunnel:
Router# ping mpls pseudowire 10.131.191.252 333 repeat 200 size 1400
Sending 200, 1400-byte MPLS Echos to 10.131.191.252, timeout is 2 seconds:
Codes:
'!' - success, 'Q' - request not sent, '.' - timeout,
'L' - labeled output interface, 'B' - unlabeled output interface,
'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch,
'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label,
'P' - no rx intf label prot, 'p' - premature termination of LSP,
'R' - transit router, 'X' - unknown return code, 'x' - return code 0
Type escape sequence to abort.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (200/200), round-trip min/avg/max = 72/85/112 ms
You can also use the ping mpls command to verify the maximum packet size that can be successfully
sent. The following command uses a packet size of 1500 bytes:
Router# ping mpls pseudowire 10.131.191.252 333 repeat 5 size 1500
Sending 5, 1500-byte MPLS Echos to 10.131.191.252, timeout is 2 seconds:
Codes:
'!' - success, 'Q' - request not sent, '.' - timeout,
'L' - labeled output interface, 'B' - unlabeled output interface,
'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch,
'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label,
'P' - no rx intf label prot, 'p' - premature termination of LSP,
'R' - transit router, 'X' - unknown return code, 'x' - return code 0
Type escape sequence to abort.
QQQQQ
Success rate is 0 percent (0/5)
The Qs indicate that the packets are not sent.
The following command uses a packet size of 1476 bytes:
Router# ping mpls pseudowire 10.131.191.252 333 repeat 5 size 1476