Re: Odd Network Problem

On 20/05/13 15:19, george cox wrote: 

> I think the one thing I would  want to know about my original problem 
 > is in the squeeze version of gnome's network-manager, left-clicking 
 > on its notification area icon would, show several options one of 
 > which is "auto eth0", this seemed to reliably attach my laptop's 
 > ethernet port to the default network of the printer-server. 

I'm pretty certain that the "auto eth0" issue is a red herring: it's 
only an automatically generated name for your default wired 
connection, and although I have't dug very deeply, the discussion in 
[1] would indicate that the change to "Wired connection" was made to 
make the naming more user friendly. 

> (...) but the manual clearly  says when the 
 > unit is reset if it can't find a dhcp server it will use the default 
 > ip. (...) the print-server defaults to using .102  (...) 


I'd guess that the different results that you see with the old and the 
new laptop reflect two not exactly identical procedures. Could you try 
the following sequence: 

-- reset the printserver so that it falls back to it's default IP 
setting (192.168.0.102 ?) 

-- edit your /etc/network/interfaces file to include a static eth0 
definition, something like this: 

auto eth0 
iface eth0 inet static 
     address 192.168.0.22 
     gateway 192.168.0.1 
     network 192.168.0.0 
     netmask 255.255.255.0 

-- then cycle the interface with 
        ifdown eth0 
     ifup eth0 

-- check with ifconfig eth0 that the interface has the correct 
    address, and that it is shown as UP 

-- try and connect 

-- if you now unplug the cable and plug it back in, I believe you'd 
    have to repeat the ifdown ifup cycle 

What make / model print server do you have? 


Klaus 

[1] https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/386900