Date: Sun, 10 Jan 1999 13:56:32 +0100 (MET) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: steven@shellnet.co.uk (Steven Fletcher) Cc: freebsd-net@FreeBSD.ORG Subject: Re: IPFW, Dummynet under 2.2.8-RELEASE. Message-ID: <199901101256.NAA16700@labinfo.iet.unipi.it> In-Reply-To: <369bb751.1554035274@smtp.shellnet.co.uk> from "Steven Fletcher" at Jan 10, 99 02:42:06 pm
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> Hi all. > > I hope I'm posting to the correct list here, I thought I'd make > certain before possibly making my first post to freebsd-bugs. > > I've been using Dummynet for the last 3 weeks or so on a machine at > the new local cybercafe which we set up, limiting 17 stations to > 64Kb/s and one to 128Kb/s. It's been working - to a point. > > Usually around 3-4PM each day, when the box starts being used more, it > crashes, dead. Sometimes it manages to reboot itself, others it it is not unlikely that you are running out of MBUFS -- a dummynet pipe uses up to 100 or more of them (depending on how you configure queue size that is) so you need some option NMBCLUSTERS=some-high-value to be safe. of course it should not crash, and of course it would be great if you could investigate more on the problem if it is easily reproducible for you. Another possible source of problems could be that buffers reference a route (descriptor) or something that has changed between the time packet was queued and the time it is sent out. But i tried to avoid this problem by copying things instead of adding references. cheers luigi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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