51
FEC In/Out Label Nexthop OutInterface
11.1.1.0/24 -/1277 20.1.1.1 GE1/1/2
1148/1277 20.1.1.1 GE1/1/2
21.1.1.0/24 1149/-
-/1276(L)
-/1150(L)
[RouterD] display mpls ldp lsp
Status Flags: * - stale, L - liberal, B - backup
FECs: 2 Ingress: 0 Transit: 0 Egress: 2
FEC In/Out Label Nexthop OutInterface
11.1.1.0/24 1151/-
-/1277(L)
21.1.1.0/24 1150/-
The output shows that Router A and Router C have received FEC-label mappings only from Router B.
Router B has received FEC-label mappings from both Router A and Router C. Router D does not
receive FEC-label mappings from Router A or Router C. LDP has established an LSP only over the
link Router A—Router B—Router C.
# Test the connectivity of the LDP LSP from Router A to Router C.
[RouterA] ping mpls -a 11.1.1.1 ipv4 21.1.1.0 24
MPLS ping FEC: 21.1.1.0/24 : with 100 bytes of data:
100 bytes from 20.1.1.2: Sequence=1 time=1 ms
100 bytes from 20.1.1.2: Sequence=2 time=1 ms
100 bytes from 20.1.1.2: Sequence=3 time=8 ms
100 bytes from 20.1.1.2: Sequence=4 time=2 ms
100 bytes from 20.1.1.2: Sequence=5 time=1 ms
--- Ping statistics for FEC 21.1.1.0/24 ---
5 packets transmitted, 5 packets received, 0.0% packet loss
Round-trip min/avg/max = 1/2/8 ms
# Test the connectivity of the LDP LSP from Router C to Router A.
[RouterC] ping mpls -a 21.1.1.1 ipv4 11.1.1.0 24
MPLS ping FEC: 11.1.1.0/24 : with 100 bytes of data:
100 bytes from 10.1.1.1: Sequence=1 time=1 ms
100 bytes from 10.1.1.1: Sequence=2 time=1 ms
100 bytes from 10.1.1.1: Sequence=3 time=1 ms
100 bytes from 10.1.1.1: Sequence=4 time=1 ms
100 bytes from 10.1.1.1: Sequence=5 time=1 ms
--- Ping statistics for FEC 11.1.1.0/24 ---
5 packets transmitted, 5 packets received, 0.0% packet loss
Round-trip min/avg/max = 1/1/1 ms