Using link congestion to control routing updates

Stephen Sprunk ssprunk at
Thu Dec 19 18:51:22 UTC 2002

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

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.


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 at]
> Sent: Thursday, December 19, 2002 11:10 AM
> To: nanog at
> 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.

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