Subject: Re: IP stack stop responding
To: Jan H. van Gils <JanVG@Knoware.NL>
From: =?ISO-8859-1?Q?Timo_Sch=F6ler?= <firstname.lastname@example.org>
Date: 11/14/2004 14:59:05
> Thanks for the reply Timo.
>>>I have a small question ?
>>>I have a current system running on a Pentium II 350MHz and 256Mb ram.
>>>the network interface card is a 3Com 3C905TX running on a 10Mb hub.
>>>When other systems connected to the same hub generate a lot
>>>say 90% load or more I am not able to connect to the current system.
>>>It is even worse, I have to reboot the system to get the stack up and
>>>Can anybody tell me what is going on and how to solve this ?
> Some extra info regarding the Kernel:
> The Kernel is build using GENERIC and I disable XNS, Apple, X25 and OSI
> futher I enabled IPSEC and IPSEC_ESP.
> That's all
>>it'd be very useful to have a little peek into some logfiles like
>>/var/log/messages e.g., especially whether there are some messages
>>regarding to your 3com NIC.
> grep -i 3com /var/log/messages
> Nov 14 14:28:22 borg /netbsd: ex0 at pci0 dev 10 function 0: 3Com 3c905B-TX
> 00 Ethernet (rev. 0x24)
> Nov 14 14:28:22 borg /netbsd: ex0: interrupting at irq 10
> Nov 14 14:28:22 borg /netbsd: ex0: MAC address 00:10:4b:06:80:9a
> Nov 14 14:28:22 borg /netbsd: exphy0 at ex0 phy 24: 3Com internal media
> So messages is not giving a lot of extra information ;-)
so there seems no 'useful' information on your system...
is your 10mbps hub manageable? or do you have one handy? if so, there
maybe a hint in it's logs.
second, if you don't have any manageable devices handy, try running e.g.
tcpdump and try to reproduce the failure. maybe the dump shows what's