[46675] in North American Network Operators' Group
Re: Load balancing in routers
daemon@ATHENA.MIT.EDU (Stephen Sprunk)
Mon Apr 8 12:49:52 2002
Message-ID: <01eb01c1df1d$550fa9a0$e1876540@amer.cisco.com>
From: "Stephen Sprunk" <ssprunk@cisco.com>
To: "joe mcguckin" <joe@via.net>,
"Iljitsch van Beijnum" <iljitsch@muada.com>
Cc: "NANOG" <nanog@merit.edu>
Date: Mon, 8 Apr 2002 11:49:16 -0500
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Thus spake "joe mcguckin" <joe@via.net>
> I don't think flow-caching is necessarily due to CEF.
>
> Even on dinky 2500 & 2600 series where you don't run CEF,
> load balancing over multiple links uses a flow-hashed method.
For the 312534906703247th time:
Switching Balancing per-
Process packet
Fast dest (net)
Flow flow
CEF* src-dest pair
CEF** packet
* by default
** with "ip load-sharing per-packet" on incoming interface
> If you want per-packet load distribution you have to specifically
> enable it by saying "no ip route-cache" on each interface.
If you want to crater your router, sure. Otherwise, I'd consider one of the
other options.
S
