I have a problem:

I am on Debian. I configured my nic with a static ip (192.168.1.56).

When I try to connect to a network, initially with ifconfig eth2 I get (correctly):

eth2 inet addr:192.168.1.56 .... 
inet6 addr: fe80:221:ff:fe96:4598/64 

but after a few seconds the 192.168.1.56 disappears and after some other seconds disappears the inet6 address too. When I press in the nm-applet it requires me the password but in the meantime it try to connect.

At uni, the connection is a DHCP one. It works for the first few seconds but after it doesn't.

Any possible solution?

Here it is the relevant part of the syslog: (static ip configuration) http://pastebin.com/u3BPAsda