[ubuntu-uk] Networking Problem

[Raf Czlonka]

On Thu, Mar 01, 2012 at 06:25:49PM GMT, Nigel Verity wrote:
> 
> Hi
> I use a Linksys X2000 router which has a tendency to drop its internet connection once or twice a day, although connections between the router and clients stay active. This is, apparently, a common problem, but with no hard and fast solution that I can ascertain.
> The internet connection is re-established by rebooting the router, either using the on/off switch, or remotely using the config pages. If I'm lucky I can then access the internet again but, more often than not, I still have to reboot the PC. The effect of this is clearly to re-initialise the PC's comms system. Does anybody know of any functions I can call which will re-initialise comms without having to reboot the PC?

You didn't mention whether you're using Ethernet or Wireless so I'll
assume the former.
I'd check what exactly stops working, i.e. DNS or maybe your lease
(I assume that you're using DHCP) hasn't expired and the system is
trying to use it but after reboot the router assigned the IP to another
computer already. Who knows.
What does your /etc/resolv.conf say when that happens?
What does ifconfig spit out?
If you're using Network Manager try restarting the service and if a
simply DHCP client, do the same.

Regards,
-- 
Raf