[54278] in North American Network Operators' Group
Re: Using link congestion to control routing updates
daemon@ATHENA.MIT.EDU (Stephen Sprunk)
Thu Dec 19 13:52:11 2002
From: "Stephen Sprunk" <ssprunk@cisco.com>
To: "Ejay Hire" <ejay.hire@isdn.net>,
"David Scott Olverson" <olverson@fas.harvard.edu>, <nanog@merit.edu>
Date: Thu, 19 Dec 2002 12:51:22 -0600
Errors-To: owner-nanog-outgoing@merit.edu
Opposite problem -- he wants to delay routing updates if the link is full.
EIGRP by default won't use more than 25/50% (I forget) of link bw, for
instance, but I'm not aware of any intentional features in other IGPs to do
this.
If routing updates constitute enough traffic to disrupt your links, you need
to investigate why you have so many updates instead of putting a band-aid on
the problem.
S
Ejay Hire wrote:
> IIRC, and I may be wrong, either IS-IS or CLNS (can't remember which)
> can look at congestion, and EIGRP can look at load if you tweak the K
> parameters.
>
> -----Original Message-----
> From: David Scott Olverson [mailto:olverson@fas.harvard.edu]
> Sent: Thursday, December 19, 2002 11:10 AM
> To: nanog@merit.edu
> Subject: Using link congestion to control routing updates
>
> I was wondering if anyone was aware of a way to use the congestion
> of a network link to control the routing update. For example if I
> have a very small link that gets congested, I may want the router to
> withhold a routing update until link congestion falls below a certain
> threshold like 60% of bandwidth. Is anyone aware of anything like
> this available today or a technique that might accomplish something
> similar? You can contact me off list if this topic isn't germane.
