Where is wlan0, I've only got ethX

[Sarangan Thuraisingham]

Jay Strauss wrote:
> Hi,
> 
> I just did a new install of breezy on a Thinkpad A30.  It has a wireless card 
> (prism 2.x).  But when I do ifconfig -a  all I have are 'eth' entries.  Same 
> goes when I do iwconfig
> 
> Furthermore I only have 2 NICs in this machine, a 10/100 wired and a wireless 
> where is "eth2" coming from?
> 
> Why don't I have a wlan0 entry?
> 
> Do I need to do something different during installation?
> 
> Thanks
> Jay
> 
> (Below are outputs from commands I thought you might need to see)
> 
> jstrauss at ubuntu:~$ ifconfig -a
> eth0      Link encap:UNSPEC  HWaddr 
> 00-20-E0-89-8F-E2-00-79-00-00-00-00-00-00-00
> -00  
>           inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
>           BROADCAST MULTICAST  MTU:1500  Metric:1
>           RX packets:2363 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:36 errors:0 dropped:111 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:262887 (256.7 KiB)  TX bytes:3805 (3.7 KiB)
>           Interrupt:11 Memory:d8ae0000-d8ae1000 
> 
> eth1      Link encap:Ethernet  HWaddr 00:D0:59:83:5F:D2  
>           inet addr:192.168.1.119  Bcast:192.168.1.255  Mask:255.255.255.0
>           inet6 addr: fe80::2d0:59ff:fe83:5fd2/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:10031 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:9218 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:5891595 (5.6 MiB)  TX bytes:1096907 (1.0 MiB)
> 
> eth2      Link encap:Ethernet  HWaddr 00:20:E0:89:8F:E2  
>           inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
>           BROADCAST MULTICAST  MTU:1500  Metric:1
>           RX packets:1140 errors:0 dropped:837 overruns:0 frame:0
>           TX packets:30 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0 
>           RX bytes:115837 (113.1 KiB)  TX bytes:3461 (3.3 KiB)
>           Interrupt:11 Memory:d8ae0000-d8ae1000 
> 
> lo        Link encap:Local Loopback  
>           inet addr:127.0.0.1  Mask:255.0.0.0
>           inet6 addr: ::1/128 Scope:Host
>           UP LOOPBACK RUNNING  MTU:16436  Metric:1
>           RX packets:45 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:45 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0 
>           RX bytes:3904 (3.8 KiB)  TX bytes:3904 (3.8 KiB)
> 
> 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)
> 
> jstrauss at ubuntu:~$ cat /etc/network/interfaces | grep -v \#
> 
> auto lo
> iface lo inet loopback
> 
> mapping hotplug
>         script grep
>         map eth1
> 
> iface eth1 inet dhcp
> 
> auto eth2
> iface eth2 inet static
> address   192.168.1.2
> network   192.168.1.0
> netmask   255.255.255.0
> broadcast 192.168.1.255
> gateway   192.168.1.1
> 
> 
> jstrauss at ubuntu:~$ iwconfig 
> lo        no wireless extensions.
> 
> eth1      no wireless extensions.
> 
> Warning: Driver for device eth0 recommend version 18 of Wireless Extension,
> but has been compiled with version 17, therefore some driver features
> may not be available...
> 
> eth0      IEEE 802.11b  ESSID:"StayOffChannelOne"  
>           Mode:Managed  Frequency:2.412 GHz  Access Point: 44:44:44:44:44:44   
>           Bit Rate:11 Mb/s   Sensitivity=1/3  
>           Retry min limit:8   RTS thr:off   Fragment thr:off
>           Power Management:off
>           
> eth2      IEEE 802.11b  ESSID:"StayOffChannelOne"  
>           Mode:Managed  Frequency:2.412 GHz  Access Point: 44:44:44:44:44:44   
>           Bit Rate:11 Mb/s   Sensitivity=1/3  
>           Retry min limit:8   RTS thr:off   Fragment thr:off
>           Power Management:off
>           Link Quality=30/70  Signal level=-66 dBm  Noise level=-97 dBm
>           Rx invalid nwid:0  Rx invalid crypt:743  Rx invalid frag:0
>           Tx excessive retries:2  Invalid misc:5856   Missed beacon:0
> 
> sit0      no wireless extensions.
> 

I have Dell Inspiron with Ethernet 10/100 and Belkin PCMCIA wireless 
card. So comparing my ifconfig and iwconfig with yours, it seems that 
eth2 is your wireless and eth1 is your ethernet 10/100. I think wlan0 
entries are created when you use ndiswrappers. If your card is supported 
natively then, I think you just get a normal ethX id.

For some reason, you wireless interface is assigned two eth ids!!!! And 
why is the eth0's MAC address(HWADDR) huge? 
00-20-E0-89-8F-E2-00-79-00-00-00-00-00-00-00-00
00-20-E0-89-8F-E2 <- this is your wireless card's MAC address, what's 
the rest?

I dont know why this is :( May be someone else may be able to shed some 
light on this
-- 
Regards,
------------------------------------
Sarangan Thuraisingham
ECS, University of Southampton, UK

    Tux is the Best
   Next is the Rest
-----------------------------------