1-38[SwitchB] mpls[SwitchB-mpls] lsp-trigger all[SwitchB-mpls] quit# Configure Switch C.[SwitchC] mpls[SwitchC-mpls] lsp-trigger all[SwitchC-mpls] quitAfter completing the above configurations, you will see that the LSPs have been established if youexecute the display mpls ldp lsp command. The following takes Switch A as an example: display mpls ldp lspLDP LSP Information-------------------------------------------------------------------SN DestAddress/Mask In/OutLabel Next-Hop In/Out-Interface------------------------------------------------------------------1 1.1.1.9/32 3/NULL 127.0.0.1 Vlan10/InLoop02 2.2.2.9/32 NULL/3 10.1.1.2 ----/Vlan103 3.3.3.9/32 NULL/1025 10.1.1.2 ----/Vlan104 20.1.1.0/24 NULL/3 10.1.1.2 ----/Vlan10-------------------------------------------------------------------A '*' before an LSP means the LSP is not establishedA '*' before a Label means the USCB or DSCB is stale# Check the validity and reachability of the LSP. ping lsp ipv4 3.3.3.9 32LSP PING FEC: LDP IPV4 PREFIX 3.3.3.9/32 : 100 data bytes, press CTRL_C to breakReply from 20.1.1.2: bytes=100 Sequence=1 time = 1 msReply from 20.1.1.2: bytes=100 Sequence=2 time = 1 msReply from 20.1.1.2: bytes=100 Sequence=3 time = 1 msReply from 20.1.1.2: bytes=100 Sequence=4 time = 1 msReply from 20.1.1.2: bytes=100 Sequence=5 time = 1 ms--- FEC: LDP IPV4 PREFIX 3.3.3.9/32 ping statistics ---5 packet(s) transmitted5 packet(s) received0.00% packet lossround-trip min/avg/max = 1/1/1 msExample for Configuring BFD for MPLS LDPNetwork requirementsz In a hierarchical VPLS network as shown in the following figure, Switch A works as a UPE device,and Switch B and Switch C work as the active and the standby NPE devices, respectively. MPLS isenabled on the interfaces connecting Switch A with Switch B or Switch A with Switch C. Theswitches run OSPF and are reachable to each other at the network layer.z When the link between Switch A and Switch B is brought down, BFD can quickly detect the linkfailure and notify it to MPLS LDP and the MPLS MFW for a quick active/standby PW switchover.
