Hi,

I had ethernet (eth0) and wireless (wlan0) working well before I run an 
emerge world (which updated baselayout)
At that time I also had eth1, which I don't know why, and the normal lo.
After the emerge, my wlan0 was gone. I still have the init script (not sure 
if is a new one, or was overwritten), that gives the following errors:

# /etc/init.d/net.wlan0 start
SIOCSIFADDR: No such device
wlan0: unknown interface: No such device
SIOCSIFBRDADDR: No such device
wlan0: unknown interface: No such device
SIOCSIFNETMASK: No such device 

The ifconfig command presents this:
# ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:00:E2:8F:5B:59
 inet addr:192.168.1.30 <http://192.168.1.30>
Bcast:192.168.1.255<http://192.168.1.255>Mask:
255.255.255.0 <http://255.255.255.0>
 inet6 addr: fe80::200:e2ff:fe8f:5b59/64 Scope:Link
 UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1
 RX packets:7113 errors:0 dropped:0 overruns:0 frame:0
 TX packets:2931 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:1000
 RX bytes:2435138 (2.3 Mb) TX bytes:481373 (470.0 Kb)
 Interrupt:10 Base address:0xe800

eth1 Link encap:UNSPEC HWaddr 
FF-FD-B7-A7-00-00-00-00-00-00-00-00-00-00-00-00
 BROADCAST MULTICAST MTU:1500 Metric:1
 RX packets:0 errors:0 dropped:0 overruns:0 frame:0
 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:1000
 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

lo Link encap:Local Loopback
 inet addr:127.0.0.1 <http://127.0.0.1> Mask:255.0.0.0 <http://255.0.0.0>
 inet6 addr: ::1/128 Scope:Host
 UP LOOPBACK RUNNING MTU:16436 Metric:1
 RX packets:6 errors:0 dropped:0 overruns:0 frame:0
 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:0
 RX bytes:300 (300.0 b) TX bytes:300 (300.0 b)

sit0 Link encap:IPv6-in-IPv4
 NOARP MTU:1480 Metric:1
 RX packets:0 errors:0 dropped:0 overruns:0 frame:0
 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:0
 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

Now I have a new sit0... again, no idea why!! 
So what I would need is to know how to get back wlan0 and get rid of eth1 
and wlan0. 

Sorry for presenting so simple problem... 
thanks in advance
Fernando.