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controlling the 'eth0' device that gets detect by ifconfig

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  controlling the 'eth0' device that gets detect by ifconfig Jim Anderson <jjanderson52000@yahoo.com> - 2012-07-27 12:07 -0400
    Re: controlling the 'eth0' device that gets detect by ifconfig Alastair Black <abqab.nemo@example.net> - 2012-07-27 11:48 -0600
      Re: controlling the 'eth0' device that gets detect by ifconfig Ian Zimmerman <itz@buug.org> - 2012-07-28 10:34 -0700
    Re: controlling the 'eth0' device that gets detect by ifconfig Richard Kettlewell <rjk@greenend.org.uk> - 2012-07-28 18:32 +0100
      Re: controlling the 'eth0' device that gets detect by ifconfig Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-07-28 21:50 +0000
    Re: controlling the 'eth0' device that gets detect by ifconfig Gordon <Gordon@clear.net.nz> - 2012-08-10 06:13 +0000

#1527 — controlling the 'eth0' device that gets detect by ifconfig

I used to run Kubuntu linux and my network addresses would be detected 
properly during startup. I have switched to crunchbang linux and my 
network runs ok except on one PC the OS is not detecting the correct
port for eth0 and I don't know how to fix the problem.

The network has two routers, one wireless and one wired using ethernet
ports. The wired router is connected to a DSL line so all of the wired
PCs should be directed to that router to connect to the world. 
Unfortunately, the problem PC detects the wireless router for the
'eth0' device.

When I run the route command, the default address is 192.168.2.1, the
address of the wireless router, not 192.168.0.1, the address of the 
wired router. If I disconnect the wireless router and reboot, then I 
think it is detected the correct router, but when I run ifconfig, the
ethernet address is in inet6, not an inet4 address.

If there a way to force the inet4 address of the wired router to be 
detected?

Jim Anderson

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#1528

On 07/27/2012 10:07 AM, Jim Anderson wrote:
>
> I used to run Kubuntu linux and my network addresses would be detected
> properly during startup. I have switched to crunchbang linux and my
> network runs ok except on one PC the OS is not detecting the correct
> port for eth0 and I don't know how to fix the problem.
>
> The network has two routers, one wireless and one wired using ethernet
> ports. The wired router is connected to a DSL line so all of the wired
> PCs should be directed to that router to connect to the world.
> Unfortunately, the problem PC detects the wireless router for the
> 'eth0' device.
>
> When I run the route command, the default address is 192.168.2.1, the
> address of the wireless router, not 192.168.0.1, the address of the
> wired router. If I disconnect the wireless router and reboot, then I
> think it is detected the correct router, but when I run ifconfig, the
> ethernet address is in inet6, not an inet4 address.
>
> If there a way to force the inet4 address of the wired router to be
> detected?
>
> Jim Anderson

gksu ifconfig wlan0 down

Alastair

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#1530

The following message is a courtesy copy of an article
that has been posted to comp.os.linux.networking as well.


Jim> If there a way to force the inet4 address of the wired router to be
Jim> detected?

Alastair> gksu ifconfig wlan0 down

A more permanent fix would be to blacklist the wifi driver in a file
such as /etc/modprobe/local-blacklist.conf.

-- 
Ian Zimmerman
gpg public key: 1024D/C6FF61AD
fingerprint: 66DC D68F 5C1B 4D71 2EE5  BD03 8A00 786C C6FF 61AD
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Rule 420: All persons more than eight miles high to leave the court.

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#1529

Jim Anderson <jjanderson52000@yahoo.com> writes:
> I used to run Kubuntu linux and my network addresses would be detected
> properly during startup. I have switched to crunchbang linux and my
> network runs ok except on one PC the OS is not detecting the correct
> port for eth0 and I don't know how to fix the problem.
>
> The network has two routers, one wireless and one wired using ethernet
> ports. The wired router is connected to a DSL line so all of the wired
> PCs should be directed to that router to connect to the
> world. Unfortunately, the problem PC detects the wireless router for
> the
> 'eth0' device.
>
> When I run the route command, the default address is 192.168.2.1, the
> address of the wireless router, not 192.168.0.1, the address of the
> wired router.

It sounds like you've got both routers acting as a DHCP server for the
same bit of network.  There's no way that's going to be reliable.

> If I disconnect the wireless router and reboot, then I think it is
> detected the correct router, but when I run ifconfig, the ethernet
> address is in inet6, not an inet4 address.

IPv6 addresses often contain modified forms of the MAC address; that's
normal.

-- 
http://www.greenend.org.uk/rjk/

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#1531

On Sat, 2012-07-28, Richard Kettlewell wrote:
> Jim Anderson <jjanderson52000@yahoo.com> writes:
...
>> If I disconnect the wireless router and reboot, then I think it is
>> detected the correct router, but when I run ifconfig, the ethernet
>> address is in inet6, not an inet4 address.
>
> IPv6 addresses often contain modified forms of the MAC address; that's
> normal.

Well, the thing is, if you have IPv6 enabled, each interface will have
at least a "Scope:Link" IPv6 address.  It's not the presence of that
one but the absence of the IPv4 one that's important.

/Jorgen

-- 
  // Jorgen Grahn <grahn@  Oo  o.   .     .
\X/     snipabacken.se>   O  o   .

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#1575

On 2012-07-27, Jim Anderson <jjanderson52000@yahoo.com> wrote:
>
> I used to run Kubuntu linux and my network addresses would be detected 
> properly during startup. I have switched to crunchbang linux and my 
> network runs ok except on one PC the OS is not detecting the correct
> port for eth0 and I don't know how to fix the problem.
>
> The network has two routers, one wireless and one wired using ethernet
> ports. The wired router is connected to a DSL line so all of the wired
> PCs should be directed to that router to connect to the world. 
> Unfortunately, the problem PC detects the wireless router for the
> 'eth0' device.
>
> When I run the route command, the default address is 192.168.2.1, the
> address of the wireless router, not 192.168.0.1, the address of the 
> wired router. If I disconnect the wireless router and reboot, then I 
> think it is detected the correct router, but when I run ifconfig, the
> ethernet address is in inet6, not an inet4 address.
>
> If there a way to force the inet4 address of the wired router to be 
> detected?
>
Sure, make the address of your network card on the PC, static. Say
192.168.2.103, which is outside the DHCP range of the router.

If you have only one LAN. Then as another poster has hinted at drop the
second DHCP. Having two DCHPs battle it out is not really the way to go.

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