Date: Sat, 21 Oct 2006 18:05:45 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: Milan Obuch <net@dino.sk> Cc: freebsd-net@freebsd.org Subject: Re: Somewhat weird net behavior Message-ID: <20061021180452.Y2879@fledge.watson.org> In-Reply-To: <200610211858.30338.net@dino.sk> References: <200610211618.11472.net@dino.sk> <20061021162630.I2879@fledge.watson.org> <200610211858.30338.net@dino.sk>
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On Sat, 21 Oct 2006, Milan Obuch wrote: > On Saturday 21 October 2006 17:28, Robert Watson wrote: >> On Sat, 21 Oct 2006, Milan Obuch wrote: >>> I know this is really minimum information here, but I need just an idea >>> what to look for. It is strange for me - is it some memory leak? How >>> could it be cleared with simple ifconfig up? Did anyone seen something >>> similar? >> >> It is pretty minimal information :-). > > Agreed. I need some help in my investigation. I have no ide what to look > for. FYI, I couldn't deliver e-mail to your e-mail address, but I guess you got it through the list. >> ifconfig down / up will cause the device driver to be reset, the link to be >> re-negotiated, etc. The buffer full error from ping means that the >> outbound interface queue has filled, and if the error doesn't go away, it >> means it's likely wedged (no longer being processed). This could reflect a >> bug in the device driver, a problem with the switch, etc. In the "wedged" >> state, what does ifconfig report about link negotiation? When you reset >> the interface, does the negotiated link type change? > > I did only ifconfig up, not down/up sequence. That's a bit weird for me. > Anyway, on next ocasion, I will do ifconfig before/after ifconfig up. Could > there be some interesting information in some netstat output too? It happens > once - twice a week, so I would rather be a bit prepared beforehand. The output of "ifconfig" with no arguments is probably a useful start. That will tell us about link negotiation, the OACTIVE flag, and so on. Robert N M Watson Computer Laboratory University of Cambridge
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