udev swapping the network interfaces [solved?]

allucid · 2006-02-13 09:01:07

After a recent upgrade my network devices (eth0 and eth1) seem to be randomly assigned at boot. This obviously causes problems for the network scripts. I tried to rectify this by specifying the device names via udev:

/etc/udev/rules.d/10-network.rules

KERNEL="eth*", SYSFS{address}="00:0d:70:a8:63:12", NAME="eth0"
KERNEL="eth*", SYSFS{address}="00:0b:a1:18:80:ba", NAME="eth1"

but this does not seem to have any effect on the device names. Anyone aware of how to fix this problem or what exactly is causing it?

*note*
I manually searched through the first couple of pages of this forum before posting this because I figured others would have this problem and forum search currently does not work for me. Sorry if this is a duplicate.

iphitus · 2006-02-13 09:16:03

You need to make sure the addresses tehre match your network card's own mac addresses.

You can attain these mac addresses by checking the output of ifconfig -a and looking at the hwaddr

iphitus

allucid · 2006-02-13 09:24:28

They do match. I just double-checked with ifconfig and udevinfo.

brain0 · 2006-02-13 09:53:50

KERNEL="eth*", SYSFS{address}="00:0d:70:a8:63:12", NAME="eth0"

This is your udev line. And now compare it to this one:

KERNEL=="eth*", SYSFS{address}=="00:0d:70:a8:63:12", NAME="eth0"

See the difference? Stare at it until you see it.

I'd also reommend this change:

SUBSYSTEM=="net", SYSFS{address}=="00:0d:70:a8:63:12", NAME="eth0"

It makes this rule more general and even works if the interface is named completely different by the kernel.

viniosity · 2006-02-13 13:01:27

This is kind of useful.. I have this happen sometimes (rarely) too. Perhaps a wiki page..

allucid · 2006-02-13 22:18:13

brain0 wrote:

KERNEL="eth*", SYSFS{address}="00:0d:70:a8:63:12", NAME="eth0"
This is your udev line. And now compare it to this one:
KERNEL=="eth*", SYSFS{address}=="00:0d:70:a8:63:12", NAME="eth0"
See the difference? Stare at it until you see it.
I'd also reommend this change:
SUBSYSTEM=="net", SYSFS{address}=="00:0d:70:a8:63:12", NAME="eth0"
It makes this rule more general and even works if the interface is named completely different by the kernel.

Thank you! I copied that bit I had above (except for the MACs) from a howto page on udev. I guess they changed some things recently to require double equals for comparison? I had to go back and change some of my rules for other things as well.

brain0 · 2006-02-14 01:10:32

allucid wrote:

Thank you! I copied that bit I had above (except for the MACs) from a howto page on udev. I guess they changed some things recently to require double equals for comparison? I had to go back and change some of my rules for other things as well.

"Recently" as in "about 3 months ago" - Yes.

allucid · 2006-02-14 02:53:06

Spoke too soon! I've tried all the suggested fixes and it still does not work correctly. I re-verified that the MAC addresses are valid and are referring to the correct interface names. Any other ideas?

brain0 wrote:

"Recently" as in "about 3 months ago" - Yes.

Some of my udev rules are from over a year ago and I haven't had a reason to suspect they were incorrect.

phrakture · 2006-02-14 06:03:21

Try using NAME="lan0" instead of eth0, it seems some people have reported that renaming to eth* devices fails.

allucid · 2006-02-14 22:12:03

phrakture wrote:

Try using NAME="lan0" instead of eth0, it seems some people have reported that renaming to eth* devices fails.

OK! That seems to work now. Thanks, everyone, for your help.

ozar · 2006-02-14 23:31:10

phrakture wrote:

Try using NAME="lan0" instead of eth0, it seems some people have reported that renaming to eth* devices fails.

It often amazes me how we can be banging our heads against the wall trying to fix something and the solution turns out to be so simple. 8)

test1000 · 2006-02-18 11:49:36

and so illogical..

Arch Linux

#1 2006-02-13 09:01:07

udev swapping the network interfaces [solved?]

#2 2006-02-13 09:16:03

Re: udev swapping the network interfaces [solved?]

#3 2006-02-13 09:24:28

Re: udev swapping the network interfaces [solved?]

#4 2006-02-13 09:53:50

Re: udev swapping the network interfaces [solved?]

#5 2006-02-13 13:01:27

Re: udev swapping the network interfaces [solved?]

#6 2006-02-13 22:18:13

Re: udev swapping the network interfaces [solved?]

#7 2006-02-14 01:10:32

Re: udev swapping the network interfaces [solved?]

#8 2006-02-14 02:53:06

Re: udev swapping the network interfaces [solved?]

#9 2006-02-14 06:03:21

Re: udev swapping the network interfaces [solved?]

#10 2006-02-14 22:12:03

Re: udev swapping the network interfaces [solved?]

#11 2006-02-14 23:31:10

Re: udev swapping the network interfaces [solved?]

#12 2006-02-18 11:49:36

Re: udev swapping the network interfaces [solved?]

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