85
0.00% packet loss
round-trip min/avg/max = 1/1/2 ms
# On Switch C, test the connectivity of the LSP from Switch C to Switch A.
[SwitchC] ping lsp -a 21.1.1.1 ipv4 11.1.1.0 24
LSP Ping FEC: IPV4 PREFIX 11.1.1.0/24 : 100 data bytes, press CTRL_C to break
Reply from 10.1.1.1: bytes=100 Sequence=1 time = 3 ms
Reply from 10.1.1.1: bytes=100 Sequence=2 time = 2 ms
Reply from 10.1.1.1: bytes=100 Sequence=3 time = 2 ms
Reply from 10.1.1.1: bytes=100 Sequence=4 time = 2 ms
Reply from 10.1.1.1: bytes=100 Sequence=5 time = 2 ms
--- FEC: IPV4 PREFIX 11.1.1.0/24 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 2/2/3 ms
Configuring LDP to establish LSPs dynamically
Network requirements
Switch A, Switch B, and Switch C support MPLS.
Configure LDP to establish LSPs between Switch A and Switch C so that subnets 11.1.1.0/24 and
21.1.1.0/24 can reach each other over MPLS. Test the LSP connectivity.
Figure 25
Network diagram
Configuration considerations
•
Enable LDP on the LSRs. LDP dynamically distributes labels and establishes LSPs and thus there is no
need to manually configure labels for LSPs.
•
LDP uses routing information for label distribution. Therefore, you must configure a routing protocol
to learn routing information. OSPF is used in this example.
Configuration procedure
1.
Configure IP addresses for interfaces according to
. (Details not shown.)
2.
Configure OSPF to ensure reachability between the switches:
# Configure OSPF on Switch A.
<Sysname> system-view
Loop0
2.2.2.9/32
Vlan-int3
20.1.1.1/24
Loop0
3.3.3.9/32
Loop0
1.1.1.9/32
Vlan-int2
10.1.1.1/24
Vlan-int2
10.1.1.2/24
Vlan-int3
20.1.1.2/24
Switch A
Switch B
Switch C
11.1.1.0/24
21.1.1.0/24
Vlan-int4
11.1.1.1/24
Vlan-int5
21.1.1.1/24
