Using link congestion to control routing updates

Alec H. Peterson ahp at
Thu Dec 19 18:20:22 UTC 2002

--On Thursday, December 19, 2002 12:10 -0500 David Scott Olverson 
<olverson at> wrote:

> Hello all,
> 	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.

Route flap is bad.  Something like this would introduce a huge amount of 
route flap, and would probably just end up causing congestion ossilation.

As far as I know there is nothing to do this in the 'common' routers 
(cisco, Juniper).


Alec H. Peterson -- ahp at
Chief Technology Officer
Catbird Networks,

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