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

Page: 1357 / 1488

trace mpls l2transport
Syntax
trace mpls l2transport [ vrf vrfName ]
{ 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 ]
Release Information
Command introduced in JUNOSe Release 8.0.0.
data-size keyword and dataSize variable added in JUNOSe Release 11.1.0.
Description
Sends MPLS echo request packets with successively higher TTL values to the specified
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
trace mpls l2transport
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Chapter 8: T Commands