From owner-freebsd-net@FreeBSD.ORG Sun Nov 30 05:09:14 2008 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2DE461065673 for ; Sun, 30 Nov 2008 05:09:14 +0000 (UTC) (envelope-from Mykel@mWare.ca) Received: from ox.eicat.ca (ox.eicat.ca [66.96.30.35]) by mx1.freebsd.org (Postfix) with ESMTP id 0BBA08FC16 for ; Sun, 30 Nov 2008 05:09:13 +0000 (UTC) (envelope-from Mykel@mWare.ca) Received: from fulgidous.condor.lan (radix.mWare.ca [72.0.75.75]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ox.eicat.ca (Postfix) with ESMTP id F191EBF86 for ; Sun, 30 Nov 2008 00:09:12 -0500 (EST) Message-ID: <49321FF8.6000805@mWare.ca> Date: Sun, 30 Nov 2008 00:09:12 -0500 From: Mykel User-Agent: Thunderbird 2.0.0.18 (Macintosh/20081105) MIME-Version: 1.0 To: freebsd-net@freebsd.org References: <4931A5B6.1060000@mWare.ca> <49321494.90706@elischer.org> <49321EE2.6020001@freebsd.org> In-Reply-To: <49321EE2.6020001@freebsd.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: Determining counts or size of routing table? (netstat performance?) X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 30 Nov 2008 05:09:14 -0000 Sam Leffler wrote: > Julian Elischer wrote: >> Mykel wrote: >>> Got a few 6.x machines running OpenBGPd with a few BGP full-feeds and a >>> handful of peers... I'd like to determine the size of the FIB/kernel >>> routing table. OpenBGPd does not give me this data, and on my >>> duallie-Xeon 2.8s, it takes quite a while to use netstat & wc to count. >>> >>> I'm not looking for exact numbers, just something I can poll via >>> NetSNMP >>> and plot in cacti... >>> >>> I looked though netstat, route, sysctl, vmstat, even pored over an >>> snmpwalk... can't find anything. >>> Been asking around, and the only suggestion I've received was to >>> write a >>> daemon that dumps the table and then monitors the changes, but I'm >>> not a >>> programmer, nor could I find any tool in ports that might assist in >>> this. >>> >>> I'd be happy with almost any metric that gives me some absolute >>> reference as to how big my routing table is so I can get some nice >>> pretty graphs done up. Not pounding the system every 60-300 seconds >>> would be very nice. >>> >>> Any suggestions? Or does everyone just pipe netstat? Is there a MIB for >>> sysctl or NetSNMP I'm missing? >>> >> >> no. It's a hard thing to do so that is why it hasn't been done yet. > Perhaps I misunderstand his question but > > trouble% vmstat -m |grep routetbl > routetbl 14 2K - 33875 16,32,64,128,256 > > should show memory allocated to the routing table. I was also shown (privately) this: # vmstat -z | grep "rtentry" rtentry: 120, 0, 198, 474, 12190, 0 Either works for me, so I'm now happy. Thanks! Myke