Juniper JUNOSE 11.1.X - COMMAND REFERENCE N TO Z 4-6-2010 Command Reference Manual page 1356

JUNOSe 11.1.x Command Reference Guide N to Z
Privileged Exec, User Exec
Mode
1314
trace mpls ip
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
detail Displays detailed information about MPLS echo request sent and echo
replies received