Bizzare FC2 test 1 networking issue

[Tim Hawkins]

Tim Hawkins wrote:

> Paul Gear wrote:
>
>> Tim Hawkins wrote:
>>  
>>
>>> ...
>>>   
>>>
>>>> Have you tried with ECN disabled?  I have a netgear router that 
>>>> doesn't
>>>> work with ECN... but mine doesn't freeze.  ECN was enabled by 
>>>> default in
>>>> FC2 and it took me awhile to figure out why only TCP was broken on my
>>>> FC2 system.  Disable ECN by running:
>>>>
>>>> echo 0 > /proc/sys/net/ipv4/tcp_ecn
>>>> ...
>>>>
>>>>     
>>>
>>> Is that a permement change Nathan, or will I have to put that into the
>>> rc scripts to ensure its disabled on boot?
>>>   
>>
>>
>> To make those changes permanent, put a corresponding entry in
>> /etc/sysctl.conf.
>>  
>>
> That seems to fix the problem Paul, laptop boots ok now without 
> killing router
> I'll get onto Netgear and findout why tcp_ecn cause the router so much 
> distress. Im running
> the latest firmware on the box, and its a very popular brand/model.
>
>
>
I spoke too soon, its better but the problem still exists

I have narrowed it down to DHCP negotiation which is strange as the 
netgear router is not configured to operate as a DHCP server.

Its not the network card driver as I have now switched to a wireless lan 
card and the problem is the same .

I get the following in the system log just as the router dies.

Feb 28 17:27:45 timslaptop kernel: Uniform CD-ROM driver Revision: 3.20
Feb 28 17:27:45 timslaptop udev[3296]: creating device node '/udev/hdc'
Feb 28 17:28:40 timslaptop kernel: ip_tables: (C) 2000-2002 Netfilter 
core team
Feb 28 17:28:40 timslaptop kernel: eth1: error -110 reading info frame. 
Frame dropped.
Feb 28 17:28:40 timslaptop kernel: eth1: Error -110 setting multicast list.
Feb 28 17:28:40 timslaptop last message repeated 2 times
Feb 28 17:28:40 timslaptop dhclient: sit0: unknown hardware address type 776
Feb 28 17:28:40 timslaptop kernel: eth1: New link status: Connected (0001)
Feb 28 17:28:41 timslaptop dhclient: sit0: unknown hardware address type 776
Feb 28 17:28:43 timslaptop dhclient: DHCPREQUEST on eth1 to 
255.255.255.255 port 67
Feb 28 17:28:43 timslaptop dhclient: DHCPACK from 192.168.0.242
Feb 28 17:28:43 timslaptop dhclient: bound to 192.168.0.163 -- renewal 
in 100950 seconds.
Feb 28 17:33:51 timslaptop kernel: spurious 8259A interrupt: IRQ7.
Feb 28 17:34:33 timslaptop nmbd[2422]: [2004/02/28 17:34:33, 0] 
nmbd/nmbd_become_lmb.c

192.168.0.242 is an NT box operating as a DHCP server, the reason for 
that is complicated, to do with limitations
    in the netgear DHCP server, I need to be able to set the DNS servers 
for the DHCP reponse, so that I can have local copies of my
    domains on an internal DNS with internal addresses, rather than the 
external addreses on the external ISP DNS. netgear assumes they are  the 
uptream ISP servers it has DHCP'd from the adsl provider. the DHCP 
server is disable on the netgear router.

If I set the ip's, DNS's staticaly, then the system is stable.