The following operations apply to lsp-ping and lsp-trace:
The lsp-ping tool only works when the responder node is in the same domain (SR or LDP) as the sender node.
The lsp-trace tool works throughout the LDP and SR domains. When used with the DDMAP TLV, lsp-trace provides the details of the SR-LDP stitching operation at the boundary node. The boundary node as a responder node replies with the FEC stack change TLV, which contains two operations:
a PUSH operation of the SR (LDP) FEC in the LDP-to-SR (SR-to-LDP) direction
a POP operation of the LDP (SR) FEC in the LDP-to-SR (SR-to-LDP) direction
The ICMP tunneling feature is supported for SR-ISIS tunnel stitched to a LDP FEC.
The following is an output example of the lsp-trace command with the DDMAP TLV for LDP-to-SR direction (symmetric topology LDP-SR-LDP):
*A:Dut-E# oam lsp-trace prefix 10.20.1.2/32 detail downstream-map-tlv ddmap
lsp-trace to 10.20.1.2/32: 0 hops min, 0 hops max, 108 byte packets
1 10.20.1.3 rtt=3.25ms rc=15(LabelSwitchedWithFecChange) rsc=1
DS 1: ipaddr=10.10.3.2 ifaddr=10.10.3.2 iftype=ipv4Numbered MRU=1496
label[1]=26202 protocol=6(ISIS)
fecchange[1]=POP fectype=LDP IPv4 prefix=10.20.1.2 remotepeer=0.0.0.0 (Unknown)
fecchange[2]=PUSH fectype=SR Ipv4 Prefix prefix=10.20.1.2 remotepeer=10.10.3.2
2 10.20.1.2 rtt=4.32ms rc=3(EgressRtr) rsc=1
*A:Dut-E#
The following is an output example of the lsp-trace command with the DDMAP TLV for SR-to-LDP direction (symmetric topology LDP-SR-LDP):
*A:Dut-B# oam lsp-trace prefix 10.20.1.5/32 detail downstream-map-tlv ddmap sr-isis
lsp-trace to 10.20.1.5/32: 0 hops min, 0 hops max, 108 byte packets
1 10.20.1.3 rtt=2.72ms rc=15(LabelSwitchedWithFecChange) rsc=1
DS 1: ipaddr=10.11.5.5 ifaddr=10.11.5.5 iftype=ipv4Numbered MRU=1496
label[1]=262143 protocol=3(LDP)
fecchange[1]=POP fectype=SR Ipv4 Prefix prefix=10.20.1.5 remotepeer=0.0.0.0 (Unknown)
fecchange[2]=PUSH fectype=LDP IPv4 prefix=10.20.1.5 remotepeer=10.11.5.5
2 10.20.1.5 rtt=4.43ms rc=3(EgressRtr) rsc=1