Example 2 - Cisco Catalyst 4500 Series Configuration Manual

Configuring Bidirection Forwarding Detection
Note Support on the Catalyst 4500E is limited. Starting with Cisco IOS Release IOS 15.1(1)SG, Bidirectional
Forwarding Detection (BFD) is supported only on Catalyst 4900M, and Catalyst 4948E Ethernet
switches.
This document describes how to enable the BFD protocol, which is a detection protocol designed to
provide fast forwarding path failure detection times for all media types, encapsulations, topologies, and
routing protocols.
BFD provides a consistent failure detection method for network administrators in addition to fast
forwarding path failure detection. Because the network administrator can use BFD to detect forwarding
path failures at a uniform rate, rather than the variable rates for different routing protocol hello
mechanisms, network profiling and planning are simplified, and reconvergence time is more consistent
and predictable.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature
information and caveats, see the release notes for your platform and software release. To find information
about the features documented in this module, and to see a list of the releases in which each feature is
supported, see the
Use Cisco Feature Navigator to find information about platform support and Cisco software image
support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on
Cisco.com is not required.
Contents
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OL-25340-01
"Technical Assistance" section on page
Prerequisites for Bidirectional Forwarding Detection, page 37-2
Restrictions for Bidirectional Forwarding Detection, page 37-2
Information About Bidirectional Forwarding Detection, page 37-2
How to Configure Bidirectional Forwarding Detection, page 37-7
Configuration Examples for Bidirectional Forwarding Detection, page 37-17
Additional References, page 37-28
C H A P T E R
37-29.
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
37
37-1