Cisco Catalyst 4500 Series Configuration Guide

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Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
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Chapter 37 Configuring Bidirection Forwarding Detection
Configuration Examples for Bidirectional Forwarding Detection
Configuration Examples for Bidirectional Forwarding Detection
This section provides the following configuration examples:
• Example: Configuring BFD in an EIGRP Network with Echo Mode Enabled by Default, page 37-17
• Example: Configuring BFD in an OSPF Network, page 37-21
• Example: Configuring BFD Hardware-Offload support in a BGP Network Network, page 37-25
• Example: Configuring BFD Support for Static Routing, page 37-27
Example: Configuring BFD in an EIGRP Network with Echo Mode Enabled by
Default
The following example shows how to configure BFD in an EIGRP network with echo mode enabled by
default in Cisco IOS Release 15.1(1)SG. In the following example, the EIGRP network contains
SwitchA, SwitchB, and SwitchC. Gigabit Ethernet interface 6/1 on SwitchA is connected to the same
network as Gigabit Ethernet interface 6/1 on SwitchB. Gigabit Ethernet interface 6/1 on SwitchB is
connected to the same network as Gigabit Ethernet interface 6/1 on SwitchC.
SwitchA and SwitchB are running BFD Version 1, which supports echo mode, and SwitchC is running
BFD Version 0, which does not support echo mode. We would say that the BFD sessions between
SwitchC and its BFD neighbors are running echo mode with asymmetry. This is because echo mode will
Command or Action Purpose
Step 1
enable
Switch> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
show bfd neighbors [details]
Switch# show bfd neighbors details
(Optional) Displays the BFD adjacency database.
• The details keyword shows all BFD protocol
parameters and timers per neighbor.
Step 3
debug bfd [packet | event]
Switch# debug bfd packet
(Optional) Displays debugging information about BFD
packets.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E