Bfd Application Example; Example Network Overview; Step 1: Prepare The Routers - Alcatel-Lucent OmniSwitch 6850-48 Network Configuration Manual

Configuring BFD

BFD Application Example

This section provides an example network configuration in which BFD is encapsulated within the OSPF
protocol running on the network. In addition, a tutorial is also included that provides steps on how to
configure the example network topology using the Command Line Interface (CLI).

Example Network Overview

The diagram below represents a simple OSPF network consisting of three router switches. For all three
routers, a global BFD configuration is applied to all interfaces. BFD is also registered with the OSPF rout-
ing protocol, which will receive forwarding path detection failure messages from BFD.
Whenever there is any change to the interface/neighbor list or interface/neighbor state, OSPF immediately
informs BFD about the changes. BFD then updates its database accordingly and informs OSPF for its fast-
est convergence.
VLAN 12
Interface 12.x.x.x
Router 2
Router ID 2.2.2.2
The following steps are used to configure the example BFD-enabled OSPF network as shown in the
diagram above.

Step 1: Prepare the Routers

The first step is to create the VLANs on each router, add an IP interface to the VLAN, assign a port to the
VLAN, and assign a router identification number to the routers. For the backbone connection, the network
design in this case uses slot 2, port 1 as the egress port and slot 2, port 2 as ingress port on each router.
Router 1 connects to Router 2, Router 2 connects to Router 3, and Router 3 connects to Router 1.
OmniSwitch AOS Release 6 Network Configuration Guide
Router 1
Router ID 1.1.1.1
OSPF Area 0.0.0.1 with BFD
VLAN 23
Interface 23.x.x.x
Example OSPF Network using the BFD Protocol
VLAN 31
Interface 31.x.x.x
September 2009
BFD Application Example
Router 3
Router ID 3.3.3.3
page 30-25