[22128] in North American Network Operators' Group
Re: Prioritization... (RED?)
daemon@ATHENA.MIT.EDU (Bradley Reynolds)
Tue Dec 8 23:27:42 1998
Date: Tue, 8 Dec 1998 23:47:18 +0000 (GMT)
From: Bradley Reynolds <brad@qual.net>
To: nanog@merit.edu
In-Reply-To: <Pine.BSF.4.05.9812082300560.25119-100000@null0.qual.net>
> One tidbit that is interesting: dwred on the
> cisco gives non tcp packets the lowest possible
^^^^^^
non-ip .. sorry.
> priority. Thus, with an aggressive drop pattern
> (depending on how you have configured minth, maxth and
> exponential weight on the router) you will run into a problem.
>
> I am not sure as to who has dwred configured on congested
> interfaces at exchanges. You can throw packets
> into one of 8 precedence levels @ your border and
> then craft red to select harshly against low vs. high
> priority. However, upon observation of a network
> without car matching certain types of traffic and
> setting priorities, i see about 3 orders of magnitude
> difference in packets moving at the lowest precedence
> compared to packets moving at higher precedences.
> RED considerations are not necessarily the cause
> of your problem, but it is a possibility which is
> worth investigating.
>
> more cisco implementaion specific information at:
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios111/cc111/wred.htm
>
> BR
>
