Order of network device assignments changed on boot. [solved

ebike · Last edited by ebike on Wed Dec 14, 2005 7:41 pm; edited 1 time in total

Hi All,

I have three network devices:

1. Wired eth0
2. WiFi eth1
3. Wired eth2 (via usb->ethernet adapter (ADSL modem))

eth0 and eth1 are part of a bridge br0.

My problem is that sometimes on boot eth1 and eth2 assignment gets swapped. i.e eth2 becomes the
Wifi and eth1 the ADSL modem. I have to reboot several times to get the assignments I want.

How can I ensure the order above.

(I have net.br0 and net.eth2 at boot run-level)

Thanks,
Bernard.
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ebike · Posted: Fri Dec 02, 2005 9:48 pm Post subject:

Bump ... Anyone? :cry:

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ebike · Posted: Mon Dec 05, 2005 8:14 pm Post subject:

Bumpity bump....

I have found several suggestions elsewhere:

1. adding aliases for the interface modules in /etc/moudules.d/aliases
2. Using udev to do the same.

I have tried #1. to no avail and I have no idea how to do assign a driver to an interface name in udev.
Maybe someone can come up with a rule for me??

I'm feeling all alone on this issue ... :cry:

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ebike · Posted: Wed Dec 07, 2005 6:46 am Post subject:

Ok, I'm going to have to help myself here, .. and hopefully others

.

I have made a file called /etc/udev/rules.d/20-network.rules which contains:

ebike · Posted: Thu Dec 08, 2005 9:25 pm Post subject:

Well I tried it with partial results:

The "lan" and "adsl" interfaces come up ok, but the "wifi" does not. On looking in
/sys/class/net I see that the old device eth* is still there and hasn't been renamed.

If I reload the driver for my wifi card (prism54) and then run udevstart, I get the wifi interface ok.

It looks like the prism54 module is not being loaded before udev starts.!!
Does anyone know how to ensure the module gets loaded early enough?
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ebike · Posted: Sun Dec 11, 2005 7:22 pm Post subject:

Come on people ...

184 views and no one has any comments at all??

At least if you haven't got an answer, please let me know if you have similar issues ....
someone must have found this issue, there must me someone with multiple network interfaces out there, that would have
struck this problem, I can't be the only one out there ....
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Headrush · Posted: Sun Dec 11, 2005 7:29 pm Post subject:

I didn't think the network interfaces used /dev/ device nodes, so your udev rules wouldn't help

Your best best is probably forcing the same module load order everytime by adding the modules for each into /etc/modules.autoload/kernel-2.6. This way you know which module will be loaded first and assigned eth0, then the second, eth1, etc.

ebike · Posted: Mon Dec 12, 2005 2:21 am Post subject:

Yay at last , someone lives on planet Gentoo, thanks for the reply HeadRush.

You don't need a /dev node for udev assignments, just an entry made by sysfs to /sys/class/etc etc
the udev howto gives an example of re-naming network devices this way.. it should work.

I will try the module load order you suggest, but this assumes that modules.autoload is used before hotplug/coldplug, and I don't know if
this is so .... can anyone confirm?

Cheers,
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widan · Posted: Mon Dec 12, 2005 2:35 am Post subject:

ebike · Posted: Mon Dec 12, 2005 7:15 pm Post subject:

Great, thanks widan, I will try this tonight.

Now if only I can solve why 2.6.14 has issues with hostname, where 2.6.11 is ok??
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Headrush · Posted: Mon Dec 12, 2005 7:40 pm Post subject:

ebike · Posted: Tue Dec 13, 2005 12:55 am Post subject:

... and all credit to Headrush .. your the man!

The hostname issue is that on boot I get a hostname resolve issue (not sure of the exact error message, .. and I'm away from my box
at present )

What were the changes in baselayout, i.e what is the new method of specifying hostname, was it the simple move from
/etc/hostname to /etc/conf.d/hostname?, or was there syntax changes as well?

Thanks.
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Headrush · Posted: Tue Dec 13, 2005 4:26 am Post subject:

ebike · Posted: Tue Dec 13, 2005 7:15 pm Post subject:

Yep did all that.

Hunting around the forum, looks like I might have to add host and domain to /etc/hosts..
For example, my hostname is "mythtv" and domain is "homenetwork", so I have to add:

ebike · Posted: Wed Dec 14, 2005 7:41 pm Post subject:

Ok some results:

1. On the hostname/domainname issue, it looks like the only thing I had to do was set NISDOMAIN="homenetwork", that solved that issue. I did
not have to alter my /etc/hosts file as per my previous post.

2. On the network device assignments, the load order of the modules did indeed fix my problem ... thanks guys.

I will mark this thread as solved.
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Politicians are like nappies (Diapers), you need to change them often, and for the same reason ....

Headrush · Posted: Wed Dec 14, 2005 9:27 pm Post subject: