Date: Mon, 06 Aug 2001 09:18:40 -0600 From: Wes Peters <wes@softweyr.com> To: Randy Bush <randy@psg.com> Cc: Leo Bicknell <bicknell@ufp.org>, freebsd-hackers@FreeBSD.ORG, freebsd-net@FreeBSD.ORG Subject: Re: 303,000 routes in kernel Message-ID: <3B6EB550.FEED14E7@softweyr.com> References: <20010804215529.C7176@cicely20.cicely.de> <32301.996956619@verdi.nethelp.no> <20010805002233.A7991@cicely20.cicely.de> <20010804184045.A87444@ussenterprise.ufp.org> <200108050027.f750RkG77073@earth.backplane.com> <E15TGwI-0000bu-00@roam.psg.com>
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Randy Bush wrote:
>
> > All of the current designs used in the core, and many of the edge
> > designs as well keep the "full table" (distilled to the minimum
> > amount of information to forward a packet) available to the hardware
> > forwarding engine. This includes Cisco's GSR line, and Junipers
> > M-series routers. While working differently, Cisco's 7200's and
> > 3600's also do the "full table thing".
>
> to be clear. they keep the *forwarding* table on card/in-cache, not the
^^^^^^^^^^^^^^^^^^
Which is, essentially, a route cache.
The difference is a big router (really a switch these days) has a number
of processors on the network interface cards to process the forwarding
table.
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
wes@softweyr.com http://softweyr.com/
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