3Com S7902E, Руководство по настройке

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[SwitchB] mpls
[SwitchB-mpls] lsp-trigger all
[SwitchB-mpls] quit
# Configure Switch C.
[SwitchC] mpls
[SwitchC-mpls] lsp-trigger all
[SwitchC-mpls] quit
After completing the above configurations, you will see that the LSPs have been established if you
execute the
display mpls ldp lsp
command. The following takes Switch A as an example:
<SwitchA> display mpls ldp lsp
LDP 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/InLoop0
2 2.2.2.9/32 NULL/3 10.1.1.2 ----/Vlan10
3 3.3.3.9/32 NULL/1025 10.1.1.2 ----/Vlan10
4 20.1.1.0/24 NULL/3 10.1.1.2 ----/Vlan10
-------------------------------------------------------------------
A '*' before an LSP means the LSP is not established
A '*' before a Label means the USCB or DSCB is stale
# Check the validity and reachability of the LSP.
<SwitchA> ping lsp ipv4 3.3.3.9 32
LSP PING FEC: LDP IPV4 PREFIX 3.3.3.9/32 : 100 data bytes, press CTRL_C to break
Reply from 20.1.1.2: bytes=100 Sequence=1 time = 1 ms
Reply from 20.1.1.2: bytes=100 Sequence=2 time = 1 ms
Reply from 20.1.1.2: bytes=100 Sequence=3 time = 1 ms
Reply from 20.1.1.2: bytes=100 Sequence=4 time = 1 ms
Reply 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) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 1/1/1 ms
Example for Configuring BFD for MPLS LDP
Network requirements
z
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 is
enabled on the interfaces connecting Switch A with Switch B or Switch A with Switch C. The
switches 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 link
failure and notify it to MPLS LDP and the MPLS MFW for a quick active/standby PW switchover.