From owner-freebsd-net  Thu Jul 11  6: 4:32 2002
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 3DFC337B408
	for <freebsd-net@freebsd.org>; Thu, 11 Jul 2002 06:04:28 -0700 (PDT)
Received: from vbook.express.ru (asplinux.ru [195.133.213.194])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 3165343E3B
	for <freebsd-net@freebsd.org>; Thu, 11 Jul 2002 06:04:27 -0700 (PDT)
	(envelope-from vova@express.ru)
Received: from vova by vbook.express.ru with local (Exim 3.36 #1)
	id 17SdcF-0002WU-00; Thu, 11 Jul 2002 17:04:15 +0400
Subject: Re: limits in routing table?
From: "Vladimir B. " Grebenschikov <vova@sw.ru>
To: Andreas Gerstenberg <andy@andy.de>
Cc: freebsd-net@freebsd.org
In-Reply-To: <10400000.1026292734@ag.intra>
References: <10400000.1026292734@ag.intra>
Content-Type: text/plain; charset=KOI8-R
Content-Transfer-Encoding: quoted-printable
X-Mailer: Ximian Evolution 1.0.7 
Date: 11 Jul 2002 17:04:14 +0400
Message-Id: <1026392654.790.46.camel@vbook.express.ru>
Mime-Version: 1.0
Sender: owner-freebsd-net@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-net.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-net>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-net>
X-Loop: FreeBSD.org

=F7 Wed, 10.07.2002, =D7 13:18, Andreas Gerstenberg =CE=C1=D0=C9=D3=C1=CC:
> Hi,
>=20
> I got the following error while figuring out the maximum amount of routes=
=20
> in the kernel routing table:
>=20
> # route add 192.168.1.1/32 10.0.0.1
> route: writing to routing socket: No buffer space available
> add net 192.168.1.1: gateway 10.0.0.1: routing table overflow
>=20
> # netstat -rn | wc -l
>   299448

First, you can see is it route area limit with:

# vmstat -m | fgrep routetbl\
     routetbl  6907   942K   1678K102400K  4870047    0     0=20
16,32,64,128,256,512

legend is:

# vmstat -m | fgrep HighUse
        Type  InUse MemUse HighUse  Limit Requests Limit Limit Size(s)


On -CURRENT, as I understand there no limit for routetbl zone:

# vmstat -m | fgrep rou
     routetbl    87    12K     13K   267490  16,32,64,128,256
# vmstat -m | fgrep MemUse
        Type  InUse MemUse HighUse Requests  Size(s)
=20
=20
> How can I set a higher limit?

for 4.x you can use following define in kernel config:

options         VM_KMEM_SIZE_SCALE=3D"(1)"

# VM_KMEM_SIZE_SCALE can be set to adjust the auto-tuning factor, which
# typically defaults to 4 (kernel malloc area size is physical memory=20
# divided by the scale factor).

It works for me (see above)
Or you can use -CURRENT to large routing tables, but not sure that it is
good idea for production routers.

> System: XP1700+, 512 MB DDR-RAM, FreeBSD 4.6p1 (RELENG_4_6)
> Maxusers is set to 512
>=20
> regards,
>   Andy
=20
--=20
Vladimir B. Grebenschikov
vova@sw.ru, SWsoft, Inc.

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-net" in the body of the message