Can't Navigate My LAN Or Ping

Mark Kirkwood markir at paradise.net.nz
Sun Dec 7 00:06:09 UTC 2008


Mark Kirkwood wrote:
>
> Immediately after posting I noticed that both your wired (eth0) and 
> wireless (wlan0) interfaces are using the 192.168.1.0 network. This 
> strikes me as a likely source of problems.
>
> Here is the equivalent output from my Ubtuntu laptop:
>
> [markir at zul:~]$ netstat -Frn
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS Window  
> irtt Iface
> 192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          
> 0 wlan0
> 169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          
> 0 wlan0
> 0.0.0.0         192.168.1.1     0.0.0.0         UG        0 0          
> 0 wlan0
>
> i.e no eth0 - if I  specifically list  lwan0 and eth0 setup, I see 
> that eth0 is unconfigured (as it should be...):
>

Hmm, maybe scratch at least some of that - it probably just means your 
lan cable is plugged in. I walked my laptop over to the router and 
plugged a lan cable in and now I get something more like what your 
output was:

[markir at zul:~]$ netstat -Frn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt 
Iface
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 
eth0
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 
wlan0
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 
eth0
0.0.0.0         192.168.1.1     0.0.0.0         UG        0 0          0 
eth0


However, I do notice that you have your gateway attached to *both* eth0 
and wlan0 - i.e your last 2 lines:

0.0.0.0         192.168.1.254   0.0.0.0         UG        0 0          0 
wlan0
0.0.0.0         192.168.1.254   0.0.0.0         UG        0 0          0 
eth0


whereas my machine has only 1 entry - and it changes from being attached 
to wlan0 when I'm using the wireless to eth0 when I plug in a lan cable 
(this machine is running Intrepid). This could well be a source of trouble.

regards

Mark




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