Re: Prioritization... (RED?)

[Bradley Reynolds <brad () 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