1-8Figure 1-5 Backup link for H-VPLS LSP accessCE 3NPE 3N-PWNPE 1N-PWN-PWCE 1CE 2NPE 2UPEU-PW(Backup link)U-PWThe H-VPLS in LSP access mode determines the validity of the main link according to the LDP sessionstatus 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 ListComplete the following tasks to configure VPLS:Task RemarksConfiguring MPLS Basic Capability RequiredConfiguring Remote LDP SessionsConfiguring BGP ExtensionsRequiredChoose eitherConfiguring MPLS L2VPN RequiredConfiguring a VPLS Instance RequiredBinding the VPLS Instance RequiredConfiguring VPLS Attributes OptionalConfiguring MPLS Basic CapabilityMPLS basic capability is required to create LSP tunnels on the public network. For configurationinformation, refer to MPLS Basics Configuration in the MPLS Volume.Configuring Remote LDP SessionsYou are required to configure LDP remote peers for remote LDP sessions establishment. Forconfiguration information, refer to MPLS L2VPN Configuration in the MPLS Volume.
