Network requirements – H3C Technologies H3C S7500E Series Switches User Manual

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system-view

[Sysname] sysname NPE3

[NPE3] interface loopback 0

[NPE3-LoopBack0] ip address 4.4.4.4 32

[NPE3-LoopBack0] quit

[NPE3] mpls lsr-id 4.4.4.4

[NPE3] mpls

[NPE3–mpls] quit

[NPE3] mpls ldp

[NPE3–mpls-ldp] quit

# Configure MPLS basic capability on the interface connected with NPE 1.

[NPE3] interface vlan-interface 15

[NPE3-Vlan-interface15] ip address 15.1.1.2 24

[NPE3-Vlan-interface15] mpls

[NPE3-Vlan-interface15] mpls ldp

[NPE3-Vlan-interface15] quit

# Configure the remote LDP session.

[NPE3] mpls ldp remote-peer 1

[NPE3-mpls-remote-1] remote-ip 2.2.2.2

[NPE3-mpls-remote-1] quit

[NPE3] mpls ldp remote-peer 2

[NPE3-mpls-remote-2] remote-ip 3.3.3.3

[NPE3-mpls-remote-2] quit

# Configure MPLS L2VPN.

[NPE3] mpls l2vpn

# Configure the basic attributes of VPLS instance aaa, which uses LDP.

[NPE3] vsi aaa static

[NPE3-vsi-aaa] pwsignal ldp

[NPE3-vsi-aaa-ldp] vsi-id 500

[NPE3-vsi-aaa-ldp] peer 2.2.2.2

[NPE3-vsi-aaa-ldp] peer 3.3.3.3

[NPE3-vsi-aaa-ldp] quit

[NPE3-vsi-aaa] quit

The configuration of VLAN-interface 15 and VLAN-interface 16 is similar to the configuration of
VLAN-interface 12 and VLAN-interface 13 on UPE. The configuration procedure is omitted.

After completing the above configurations, you can execute the display vpls connection command
on the PEs. There should be a PW connection established and in the state of up.

Configuring BFD in an H-VPLS Network to Detect Errors of the Main Link

Network requirements

In the H-VPLS network, Switch A is the UPE, Switch B is the main NPE and Switch C is the
backup NPE. Enable MPLS on the interfaces connecting the switches, and enable OSPF on the
switches to ensure the reachability at the network layer.

It is required that when the link between Switch A and Switch B is cut off, BFD detect the link
failure fast and inform the MPLS LDP protocol of the failure, so as to implement fast PW
switchover.