La verdad es que la solución que me has dado es bastante apañada... por lo menos no tengo que reiniciar jejeje
Mira lo que me sa cuando hago eso:
~$ sudo ifdown ra0
Password:
There is already a pid file /var/run/dhclient.ra0.pid with pid 8244
killed old client process, removed PID file
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit
http://www.isc.org/sw/dhcp/
Listening on LPF/ra0/00:14:a5:43:87:0a
Sending on LPF/ra0/00:14:a5:43:87:0a
Sending on Socket/fallback
DHCPRELEASE on ra0 to 192.168.1.1 port 67
Y con lo otro...
~$ sudo ifup ra0
There is already a pid file /var/run/dhclient.ra0.pid with pid 134993416
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit
http://www.isc.org/sw/dhcp/
Listening on LPF/ra0/00:14:a5:43:87:0a
Sending on LPF/ra0/00:14:a5:43:87:0a
Sending on Socket/fallback
DHCPDISCOVER on ra0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on ra0 to 255.255.255.255 port 67 interval 14
DHCPOFFER from 192.168.1.1
DHCPREQUEST on ra0 to 255.255.255.255 port 67
DHCPACK from 192.168.1.1
bound to 192.168.1.33 -- renewal in 123216 seconds.
A ver si ves algo raro ahí...
Un abrazo, y muchas gracias por la solución esa.. a ver si algun dia puedo tirar sin cortes...