3com S7906E 설치 설명서
1-8
Figure 1-5 Backup link for H-VPLS LSP access
CE 3
NPE 3
N-PW
NPE 1
N-PW
N-PW
CE 1
CE 2
NPE 2
UPE
U-PW
(Backup link)
U-PW
The H-VPLS in LSP access mode determines the validity of the main link according to the LDP session
status and BFD checking result. It activates the backup link when:
z
The tunnel over which the main PW is established is deleted, causing the PW to go down.
z
BFD detects a main link failure.
z
The LDP session between the peers of the main PW goes down, and the PW is deleted as a result.
VPLS Configuration Task List
Complete the following tasks to configure VPLS:
Task
Remarks
Required
Required
Choose either
Required
Required
Required
Optional
Configuring MPLS Basic Capability
MPLS basic capability is required to create LSP tunnels on the public network. For configuration
information, refer to MPLS Basics Configuration in the MPLS Volume.
Configuring Remote LDP Sessions
You are required to configure LDP remote peers for remote LDP sessions establishment. For
configuration information, refer to MPLS L2VPN Configuration in the MPLS Volume.