From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Sun Jan 08 2006 - 19:38:47 GMT-3
Dennis,
It doesn't have to be done in the IPv4 address families unless you already have other address families defined. There are examples of using a route-map to dampen specific prefixes in IEWB-RS. The key is that you *need* to "set dampening" otherwise no dampening values are applied. Try it out and see what you come up with.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
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________________________________________
From: Dennis J. Hartmann [mailto:dennisjhartmann@hotmail.com]
Sent: Sunday, January 08, 2006 3:07 PM
To: ccielab@groupstudy.com; Brian Dennis; Brian McGahan
Subject: BGP Dampening / IE Lab 5
In the solution guide for IE Lab 5, it is mentioned that BGP Dampening must be enabled in the global BGP process as a whole.
In the 12.4 BGP Command Reference, Cisco details a process of using a route-map at the end of the bgp dampening command to match on a prefix-list that only enables bgp dampening for individual prefixes (some assumptions here). This is done in a BGP IPv4 address-family though, but there's nothing stopping us from using a BGP address family in this question.
I guess this is where a proctor question would be generated.....
There is also a route-map command (set dampening) which appears to turn on bgp dampening for any route-map criteria. I'm assuming that the route-maps set dampening command can only be used to modify the half-life, suppress limit, reuse limit and max suppress time for individual criteria. Again, this is done with the use of an IPv4 BGP address family.
I have not tested this yet, but I was wondering if anyone had any feedback on this.
Thanks.
Dennis J. Hartmann
White Pine Communications
dh8@pobox.com
CCSI#23402 / CCVP / CCIP / CCNP
Cisco Optical, VPN & IDS Specialist
MCSE
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