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Date:      Wed, 21 Feb 2001 12:58:06 +0000 (GMT)
From:      Jasper Wallace <jasper@ivision.co.uk>
To:        Ingo Flaschberger <chaoztc@office.atnet.at>
Cc:        <freebsd-net@FreeBSD.ORG>
Subject:   Re: maximum number of routes?
Message-ID:  <Pine.GSO.4.30.0102211253470.4169-100000@avengers>
In-Reply-To: <Pine.LNX.4.21.0102202225320.7915-100000@office.atnet.at>

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On Tue, 20 Feb 2001, Ingo Flaschberger wrote:

> Hi
>
> how could i modify the amount of the maximum routes that freebsd allow?
>
> i have seen, that with more memory i could use more routes.
> some results from me:
> ram	routes
> 128mb 	75k
> 196mb	110k
> 256mb	150k
>
> is it possible to modify the maximum ammount and does it make sense?
> i would need that for some routers speaking bgp.
> 120k routes with 128mb ram would be nice, if possible.
>
> currently, adding more routes than supportet ends with:
> extern# route add 20.0.0.0/24 10.0.0.1
> route: writing to routing socket: No buffer space available
> add net 20.0.0.0: gateway 10.0.0.1: routing table overflow

Add this to your kernel config. file:

# 1/2 RAM for the kernel - lets us have full routes.
options		VM_KMEM_SIZE_SCALE="(2)"

See also /usr/include/machine/vmparam.h

Unfortunatly freebsd's kernel memory managment stuff dosn't dynamicly resize,
i'm pretty sure NetBSD's does, so you might like to take a look at that too.

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