H3C Technologies H3C S12500-X Series Switches - Manual (Page 49)

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The output shows that the next hop of the LSP for FEC 21.1.1.0/24 is Switch B (10.1.1.2). The LSP has been
set up over the link Switch A—Switch B—Switch C, not over the link Switch A—Switch D—Switch C.
# On Switch A, test the connectivity of the LDP LSP from Switch A to Switch C.
[SwitchA] 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 Switch C, test the connectivity of the LDP LSP from Switch C to Switch A.
[SwitchC] 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
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
--- FEC: 11.1.1.0/24 ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max = 1/1/1 ms
Label advertisement control configuration example
Network requirements
Two links, Switch A—Switch B—Switch C and Switch A—Switch D—Switch C, exist between subnets
11.1.1.0/24 and 21.1.1.0/24.
Configure label advertisement control, so LDP sets up LSPs only on the link Switch A—Switch B—Switch
C to forward traffic between subnets 11.1.1.0/24 and 21.1.1.0/24.