Juniper JUNOSE 11.1.X - COMMAND REFERENCE N TO Z 4-6-2010 Command Reference Manual page 1357

trace mpls l2transport
trace mpls l2transport [ vrf vrfName ]
Syntax
{ interfaceType interfaceSpecifier }
[ data-size dataSize ]
[ destination startIpAddress endIpAddress increment ]
[ source address sourceAddr ]
[ ttl ttlValue ] [ timeout timeOutVal ]
[ reply mode { ipv4-udp | ipv4-udp-with-router-alert } ]
[ reply pad-tlv ] [ reply dscp trafficClass ]
[ exp-bits bitValue ] [ bottom-label-ttl bottomLabelTtl ] [ detail ]
Command introduced in JUNOSe Release 8.0.0.
Release Information
data-size keyword and dataSize variable added in JUNOSe Release 11.1.0.
Sends MPLS echo request packets with successively higher TTL values to the specified
Description
layer 2 cross-connect virtual (Martini) circuit. Discovers the path MPLS packets follow
to the destination. There is no no version.
The echo request packet generated by this command contains the FEC 128
Pseudowire (Current) sub-TLV described in RFC 4379 Detecting Multi-Protocol Label
Switched (MPLS) Data Plane Failures (February 2006).
NOTE: This command is not supported for local cross-connects because local
cross-connects do not employ an LSP.
Options
vrfName Name of the VRF context
interfaceType Interface type; see Interface Types and Specifiers on page 5
interfaceSpecifier Particular interface; format varies according to interface type;
see Interface Types and Specifiers on page 5
dataSize Size of the LSP ping message (does not include the UDP, IP, and MPLS
headers of the packet); in the range 0–6400 bytes. The default value is 100 bytes.
startIpAddress First IP address within the 127.0.0.0/8 destination range
endIpAddress Last IP address within the 127.0.0.0/8 destination range
increment Number in the range 0–255 that specifies the increment between
addresses in the destination address range
sourceAddr IP address used as the packet source address
ttlValue Hop count specified by setting the time-to-live field in the header, in
the range 1–255; default value is 32; however, by default, the TTL on the inner
(stacked) label is set to 1 while transmitting the echo request packet, which
causes the packet to be exceptioned to the SRP module when the stacked label
is exposed
Chapter 8: T Commands
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trace mpls l2transport