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trace mpls l3vpn
Syntax
trace mpls l3vpn [ vrf vrfName ]
{ targetAddress targetMask | targetIpv6Prefix }
[ 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.
Description
Sends MPLS echo request packets with successively
higher TTL values to the specified L3VPN IP or IPv6 prefix. Discovers
the path MPLS packets follow to the destination. There is no no version.
The echo request packet generated by this command contains either
the VPN IPv4 sub-TLV or VPN IPv6 sub-TLV described in RFC 4379—Detecting
Multi-Protocol Label Switched (MPLS) Data Plane Failures (February
2006). Which sub-TLV is included depends on whether the trace is intended
for an IPv4 prefix or an IPv6 prefix.
You can use this command to send a request to a VPNv4 prefix
in the specified VRF. If you do not specify a VRF, then you must issue
the command from the VRF context. In either case, the trace originates
from the parent router.
Options
-
vrfName—Name of the VRF context
-
targetAddress—IP address of
the target VPN network
-
targetMask—Netmask for the
target address
-
targetIpv6Prefix—IPv6 prefix
for the target VPN network
-
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
-
timeOutVal—Number of seconds
in the range 1–32 to wait for an MPLS echo reply packet before
the connection attempt times out
- reply mode—Specifies the reply mode for the echo
request packet
- ipv4-udp—Specifies that the echo request packet
is an IPv4 UDP packet
- ipv4-udp-with-router-alert—Specifies that the echo
request packet is an IPv4 UDP packet with the router alert bit set
in the header so all routers examine this packet more closely to determine
whether further processing is necessary
- reply pad-tlv—Requests sender of an echo reply to
send a pad TLV
-
trafficClass—Number in the
range 0–255 that represents the value of the traffic class that
the sender of an echo reply is requested to set
-
bitValue—Value of the EXP
bits in the range 0–7 included in the MPLS echo request packet
-
bottomLabelTtl—Time-to-live
value of the bottom label in the stack
- detail—Displays detailed information about MPLS
echo request sent and echo replies received
Privileged Exec, User Exec
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