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RE: Ancient Isdn bri wisdom ? [7:40586] posted 04/08/2002
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To everyone, thank you for your advice, what you wrote seems reasonable.

However it seems this would mean if there are only single channel
connections (64k or 56k only) [m]route-cache and fair-queue can remain
enabled. I'll try that asap.

Heiko Herold

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> -----Original Message-----
> From: Lomker, Michael [mailto:mlomker@xxxxxxx]
> Sent: Friday, April 05, 2002 5:31 PM
> To: cisco@xxxxxxxxxxxxxx
> Subject: RE: Ancient Isdn bri wisdom ? [7:40586]
> > Now I tried to research the reason for that and really didn't 
> > find any.
> It is done because ISDN lines are considered two physical 
> paths that are
> bonded together using PPP multilink or Cisco's proprietary 
> bonding.  If you
> don't disable route caching then the tcp/ip conversation will 
> always be
> switched out the same physical path (your big download will 
> only use 1/2 of
> the 128k connection).  It's easy to test that...just remove 
> it sometime.
> no-fair queue appears to be the default for asynchronous 
> interfaces on the
> later versions of IOS.  To be honest, I'm not certain why 
> FIFO offers better
> performance than WFQ would on asynch lines; I can't find a 
> good explanation
> on CCO right now.

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