4000 Router Series MPLS Configuration Guide

Statistics:

FECs: 2 Ingress LSPs: 2 Transit LSPs: 2 Egress LSPs: 0

FEC In/Out Label Nexthop OutInterface

11.1.1.0/24 -/1277 10.1.1.1 S2/0

1277/1277 10.1.1.1 S2/0

21.1.1.0/24 -/1149 20.1.1.2 S2/1

1276/1149 20.1.1.2 S2/1

[RouterC] display mpls ldp lsp

Status Flags: * - stale, L - liberal

Statistics:

FECs: 2 Ingress LSPs: 1 Transit LSPs: 1 Egress LSPs: 1

FEC In/Out Label Nexthop OutInterface

11.1.1.0/24 -/1277 20.1.1.1 S2/0

1148/1277 20.1.1.1 S2/0

21.1.1.0/24 1149/-

-/1276(L)

-/1150(L)

[RouterD] display mpls ldp lsp

Status Flags: * - stale, L - liberal

Statistics:

FECs: 2 Ingress LSPs: 0 Transit LSPs: 0 Egress LSPs: 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 has 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 set up an LSP only over the link Router A—Router

B—Router C.

# On Router A, 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 : 100 data bytes

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

--- FEC: 21.1.1.0/24 ping statistics ---

5 packets transmitted, 5 packets received, 0.0% packet loss

round-trip min/avg/max = 1/2/8 ms

# On Router C, 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 : 100 data bytes

100 bytes from 10.1.1.1: Sequence=1 time=1 ms