On Sun, Jan 07, 2007 at 04:52:29PM +0100, Krzysztof Kowalik wrote: > Hello. > > We are running an (IRC) server that under high-rate traffic (ie. DDoS > attack) stops to respond to the network. The network remains locked up > even after the original attack stops. However running tcpdump (which > switches the interface into promisc mode) unlocks networking and things > work again. > > At the moment, we are running 6.2-RC1 cvsupped at Dec 10, with if_fxp.c > from Nov 11 (previously, we had 6.1 for a while, having the same issues) > > if_fxp.c,v 1.240.2.10.2.1 2006/11/20 16:21:12 > > The same machine used to run FreeBSD 4.11 without any problems. > > Any help/pointers/suggestions would be appreciated.
You'll probably need to set up DDB and run the usual tracing commands (see the developers handbook) to obtain further debugging information to proceed here. Kris
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