From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Mon Dec 22 2003 - 14:26:55 GMT-3
You might look into IP event dampening.
Rack1R4#sho ver | in IOS
IOS (tm) C2600 Software (C2600-J1S3-M), Version 12.2(15)T5, RELEASE
SOFTWARE (fc1)
Rack1R4#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Rack1R4(config)#int e0/0
Rack1R4(config-if)#dampening ?
<1-30> Half-life time for the penalty
<cr>
Rack1R4(config-if)#dampening
Rack1R4(config-if)#^Z
*Mar 2 18:02:01.473: %SYS-5-CONFIG_I: Configured from console by console
Rack1R4#debug dampening all
Dampening all debugging is on.
Rack1R4#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Rack1R4(config)#int e0/0
Rack1R4(config-if)#shut
*Mar 2 18:02:21.322: IF-EvD(Ethernet0/0): IP Routing reports state
transition from UP to DOWN
*Mar 2 18:02:21.322: EvD(Ethernet0/0): accum. penalty decayed to 0 after 49
second(s)
*Mar 2 18:02:21.322: EvD(Ethernet0/0): charge penalty 1000, new accum.
penalty 1000, flap count 3
*Mar 2 18:02:21.326: EvD(Ethernet0/0): accum. penalty 1000, not suppressed
*Mar 2 18:02:21.326: IF-EvD(Ethernet0/0): update IP Routing state to DOWN,
interface is not suppressed
Rack1R4(config-if)#no shut
Rack1R4(config-if)#
*Mar 2 18:02:23.333: IF-EvD(Ethernet0/0): IP Routing reports state
transition from DOWN to UP
*Mar 2 18:02:23.333: IF-EvD(Ethernet0/0): update IP Routing state to UP,
interface is not suppressed
*Mar 2 18:02:24.335: IF-EvD(Ethernet0/0): IP Routing reports state
transition from UP to UP
Rack1R4(config-if)#
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccie2be
Sent: Monday, December 22, 2003 9:08 AM
To: Group Study
Subject: Flapping interface
Hi,
How do I make a router disable an unstable interface until the interface
becomes stable? I have a practice lab requirement to do this but BGP isn't
involved. I know that I can use route dampening with BGP, but how do I
accomplish essentially the same thing if BGP isn't part of the equation?
Thanks in advance, dt
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