Where is wlan0, I've only got ethX

[Derek Broughton]

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?

Why do you think you should have one?  My ipw2200 is eth1.  Many athlon NICs
are ath0.  With udev, you could probably make anything you want.  So eth0-2
are fine.
> 
> Do I need to do something different during installation?

> (Below are outputs from commands I thought you might need to see)

good!

> 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

There's something seriously wrong there - it's clearly the same device as
eth2, but it's (a) not Ethernet and (b) has an odd format for the MAC.
Plus, both eth0 & eth2 are showing way too many dropped packets - 5% on eth0
and more than 70% on eth2!


> 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

So if you didn't think you had an eth2, why configure it?

> jstrauss at ubuntu:~$ iwconfig
> lo        no wireless extensions.
> 
> eth1      no wireless extensions.

This is your _wired_ NIC.  You probably need to load its module
in /etc/modules (or any one of the other possible preload points) to make
sure it is created as eth0 - not really necessary, but we all just expect
eth0 to be wired.
> 
> 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.

-- 
derek