Bfd Support For Bgp; Centralized Bfd; Figure 3: Bfd For Ies/Vprn Over Spoke Sdp - Alcatel-Lucent 7450 ESS OS Configuration Manual

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BFD Support for BGP

This feature enhancement allows BGP peers to be associated with the BFD session. If the BFD

session failed, then BGP peering will also be torn down.

The following applications of centralized BFD require BFD to run on the SF/CPM.

IES Over Spoke SDP

One application for a central BFD implementation is so BFD can be supported over spoke SDPs

used to inter-connection IES or VPRN interfaces. When there are spoke SDPs for inter-

connections over an MPLS network between two routers, BFD is used to speed up failure

detections between nodes so re-convergence of unicast and multicast routing information can

begin as quickly as possible.

The MPLS LSP associated with the spoke SDP can enter or egress from multiple interfaces on the

box. BFD for these types of interfaces can not exist on the IOM itself.

In this case BFD is run between

the IES/VPRN interfaces

7450 ESS OS Router Configuration Guide

IP Router Configuration

Primary Path

Secondary Path