Cisco IE 4000 Software Configuration Guide

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Configuring IP Unicast Routing
Configuring BFD
 Configure IS-IS as described in the Configuring IS-IS Dynamic Routing, page 871.
DETAILED STEPS
To disable IS-IS BFD on all interfaces, enter the no bfd all-interfaces router configuration command. To disable it on the
specified interface, enter the no isis bfd or the isis bfd disable interface configuration command on the interface.
If you only want to run IS-IS BFD on a few interfaces, instead of enabling it globally, you can enter the isis bfd interface
configuration command on those interfaces. See the next procedure.
Note: Although IS-IS BFD operates only on Layer 3 interfaces, you can configure it on interfaces in Layer 2 or Layer 3
mode. When you enable it, you see this message:
%ISIS BFD is reverting to router mode configuration, and remains disabled.
EXAMPLE
This is an example of setting fast convergence and enabling BFD for IS-IS on all IS-IS interfaces:
Switch(config)# router is-is tag1
Switch(config-router)# bfd all-interfaces
Switch(config-router)# exit
Configuring BFD for IS-IS on an Interface
BEFORE YOU BEGIN
 Configure BFD parameters on the interface as described in the Configuring BFD Session Parameters on an Interface,
page 886.
 Configure IS-IS as described in the Configuring IS-IS Dynamic Routing, page 871.
Command Purpose
1. configure terminal Enter global configuration mode.
2. router is-is area-tag Specify an IS-IS process and enter router configuration mode.
3. bfd all-interfaces Enable BFD globally on all interfaces associated with the IS-IS
routing process.
4. exit (Optional) Return to global configuration mode if you want to
disable BFD on one or more IS-IS interfaces.
5. interface interface-id (Optional) Specify an interface and enter interface configuration
mode.
6. ip router isis (Optional) Enable IPv4 IS-IS routing on the interface.
7. isis bfd disable (Optional) Disable BFD on the IS-IS interface. Repeat Steps 5
through 7 for all IS-IS interfaces on which you do not want to run
BFD sessions.
8. end Return to privileged EXEC mode.
9. show bfd neighbors [detail] Verify the configuration.
10. copy running-config
startup-config
(Optional) Save your entries in the configuration file.

Cisco IE 4000 Specifications

General

Product Type	Switch
Form Factor	DIN Rail Mountable
MAC Address Table Size	8000
Jumbo Frame Support	9216 bytes
Operating Temperature	-40°C to 70°C
Mean Time Between Failures (MTBF)	Over 500, 000 hours
Memory	256 MB DRAM
Mounting	DIN Rail, Wall
Certifications	EN 50121-4
Ports	8 x 10/100Base-TX Ethernet Ports