Date: Sun, 30 Nov 2008 00:09:12 -0500 From: Mykel <Mykel@mWare.ca> To: freebsd-net@freebsd.org Subject: Re: Determining counts or size of routing table? (netstat performance?) Message-ID: <49321FF8.6000805@mWare.ca> In-Reply-To: <49321EE2.6020001@freebsd.org> References: <4931A5B6.1060000@mWare.ca> <49321494.90706@elischer.org> <49321EE2.6020001@freebsd.org>
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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
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