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List:       quagga-dev
Subject:    [quagga-dev 4485] [OT] Re: Multipath with OSPF
From:       Stefanos Harhalakis <v13 () priest ! com>
Date:       2006-11-17 16:37:48
Message-ID: 200611171837.48714.v13 () priest ! com
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On Friday 17 November 2006 17:39, Len Sorensen wrote:
> On Fri, Nov 17, 2006 at 01:36:37PM +0200, Stefanos Harhalakis wrote:
> > Just to add a note to this thread:
> >
> >   Per packet load balancing is not a good thing(tm) most of the times.
> > Adding variable latency and out of order delivery of packets to TCP
> > connections will most probably reduce your overall throughput and
> > increase bandwidth usage. Apart from this, this should work by forcing
> > the OS to stop using its route cache if any and in that case will it lead
> > to greater CPU usage.
>
> That is certainly true.  I have had customers ask 'Why doesn't it use
> both connections?  My cisco does.'.  Sometimes I start getting fed up
> explaining to people that what their cisco does is a bad thing.

This one may be off-topic:

AFAIK, for cisco routers you have to disable the route cache by using:

Router(config)# no ip route-cache

which disables the hardware based (fast-path) route lookups in route cache and 
uses the CPU (slow-path) to determine each route.

> Len Sorensen
<<V13>>
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