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Date:      Thu, 26 Apr 2001 19:32:36 +0200
From:      sthaug@nethelp.no
To:        mike@sentex.net
Cc:        freebsd-net@freebsd.org
Subject:   Re: number of interfaces and performance ?
Message-ID:  <81010.988306356@verdi.nethelp.no>
In-Reply-To: Your message of "Thu, 26 Apr 2001 11:21:17 -0400"
References:  <5.1.0.14.0.20010424145602.05c353a0@marble.sentex.ca>

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> I have the need to put together a somewhat largish VLAN router (larger than 
> I have done before) with about 35 interfaces.  Has anyone put anything like 
> this together ?  The box would be routing about 25-30Mb at peak rate.  I 
> recall reading something about LINUX being very inefficient when it comes 
> to multiple interfaces.  Does FreeBSD suffer from the same fate ?  I also 
> recall someone running into problems with 16 physical interfaces (4 x 4 
> multiport nics).  Not sure how much of that was an hardware resource issue 
> and how much a software resource issue . Will it work OK in theory, or 
> should I spend the $8K on a 3640 ?

As long as you're just doing Ethernet, you might want to consider the
2948G-L3 as an alternative to a 3640. IP routing in hardware, 48 10/100
ports and 2 Gigabit ports. *Way* more backplane bandwidth and pps than
the 3640. Con: No access lists on the 10/100 ports.

We're using these as pure routers (no bridging), and they're working very
well. (We used to have the 2948G-L3 do bridging also, that did *not* work
very well.)

Steinar Haug, Nethelp consulting, sthaug@nethelp.no

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