Vpls Configuration Task List - HP 6127xlg Configuration Manual

Figure 98 UPE dual homing and redundancy in H-VPLS using MPLS access
The backup U-PW is used in the following scenarios:
The primary U-PW goes down because the tunnel that carries the primary U-PW is deleted or a fault
•
detection mechanism such as BFD detects the tunnel failure.
The primary U-PW is deleted by the control plane. For example, the LDP session on the primary
•
U-PW link is down, causing the primary U-PW to be deleted.
BFD detects a failure of the primary U-PW.
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• A primary and backup U-PW switchover is triggered by a command.
HP recommends executing the port bridge enable command on the NPE 1' interface connected to NPE
4 when the following conditions are met:
• The MPLS network (edge domain) is configured with a fast switchover mechanism, for example, LDP
FRR or MPLS TE FRR.
A primary tunnel is established over the link UPE—NPE 1, and a backup tunnel is established over
•
the link UPE—NPE 4—NPE 1.
When the primary tunnel fails, traffic will be immediately switched to the backup tunnel. The failover time
is so short that the U-PW switchover from primary to backup might not be triggered. In this scenario, NPE
1 needs to forward traffic received from NPE 4 to NPE 4, NPE 3, and NPE 2 in the backbone domain.
To ensure correct forwarding, execute the port bridge enable command on the NPE 1' interface
connected to NPE 4. Then, NPE 1 can send traffic received on the interface out of the interface itself.

VPLS configuration task list

To configure a VPLS network, perform the following tasks:
Configure an IGP to ensure IP connectivity within the backbone network.
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Configure basic MPLS, LDP, GRE, or MPLS TE to establish public tunnels on the backbone network.
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Configure VPLS on PEs. For example, configure a VSI, establish a PW, and associate an AC and a
•
VSI.
This chapter describes only VPLS configurations on a PE. For more information about other configurations,
see relevant configuration guides.
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