[solved] weird numbering of network devices after cloning..

oliwel · n00b Joined: 09 Oct 2004 Posts: 67

Hi Folks,

I have a very weird error here - I have two boxes which are nearly equal regarding hardware, I setup the first box which works fine, I copied over the whole filesystem to the second box and have now troubles with the NICs.

On Box A (the original setup) I have two NICs which are correctly numbered as eth0 and eth1.

On Box B (the cloned one) I have two NICs which are numbered as eth2 and eth3, no eth0/1 shows up on this box, there is no other hardware that I can image to take this numbers.

Does udev daemon use cashed data from the old node? If so were can I find it and reset it to have eth0/eth1 back again.

Oliver

mudrii · l33t Joined: 26 Jun 2003 Posts: 789 Location: Singapore

what is output from ifconfig -a ?
what script is in /etc/init.d/net.ethX ?
_________________
www.gentoo.ro

oliwel · n00b Joined: 09 Oct 2004 Posts: 67

ifconfig -a shows only eth2 and eth3
I had eth0 and eth1 scripts in init.d what failed - now I have eth2 and eth3 in there and it works.

Oliver

JeliJami · Veteran Joined: 17 Jan 2006 Posts: 1086 Location: Belgium

remove the udev network rules file:

pharoh · Posted: Wed Jun 06, 2007 1:13 pm Post subject: eth0 now eth2?

Hi all,

we recently have started to have a problem on new loads of Gentoo where the network adapters eth0 and eth1 show up as eth2 and 3 but in dmesg we can see they are detected as 0 and 1 then renamed. any ideas? the systems are all using gentoo-sources 2.6.18/19/20 and the e1000 driver.
_________________
Linux user number 361815

PaulBredbury · Watchman Joined: 14 Jul 2005 Posts: 6607

Look for renaming:

jschweg · Tux's lil' helper Joined: 21 Feb 2004 Posts: 85

This happened when I upgraded udev.

I just renamed the interface back to eth0 in /etc/udev/rules.d/*-persistent-net.rules

pharoh · Posted: Wed Jun 06, 2007 1:33 pm Post subject:

yes it is looking at the original machine and not the imaged machine so it adds 2 new nics. nice feature but wish it was in the notes during an emerge :-(

THANK YOU!
_________________
Linux user number 361815

nixnut · Posted: Wed Jun 06, 2007 5:47 pm Post subject:

merged above four posts here.
_________________
Please add [solved] to the initial post's subject line if you feel your problem is resolved. Help answer the unanswered

talk is cheap. supply exceeds demand

anjgentoo · n00b Joined: 12 Jun 2007 Posts: 18

[quote="davjel"]remove the udev network rules file:

hidrogen · n00b Joined: 08 Mar 2007 Posts: 51

I have some gentoo virtual machines on a computer with windows xp.

After a reboot i lost my network connections. The network interfaces used to be eth0 and eth1 but after doing cat /proc/net/dev instead of having eth0 and eth1 i had eth3 and eth4.

The module pcnet32 is loaded when i boot the virtual machines. How can i rename my interfaces back to the eth0 and eth1? Anyone knows why this happened?

Thanks in advance

Dagger · Developer Joined: 11 Jun 2003 Posts: 765 Location: UK

check/post

hidrogen · n00b Joined: 08 Mar 2007 Posts: 51

It seems i don't have that file. What should i do now?

nixnut · Posted: Wed Oct 10, 2007 4:40 pm Post subject:

merged above three posts here.
_________________
Please add [solved] to the initial post's subject line if you feel your problem is resolved. Help answer the unanswered

talk is cheap. supply exceeds demand

hidrogen · n00b Joined: 08 Mar 2007 Posts: 51

jniklast · n00b Joined: 12 Mar 2005 Posts: 42

running udevstart should do the trick

peaceful · Apprentice Joined: 06 Jun 2003 Posts: 287 Location: Utah

I have two identical x86 servers. I just installed Gentoo on one of them, and then cloned the disk (used a disk duplication thing to copy the whole disk block-by-block) and put it in the second one.

Everything works EXCEPT the network ports on the second one show up as eth2 and eth3 instead of eth0 and eth1!!!!

How can I get those switched back to eth0 and eth1? I have some scripts that deal with network interfaces that I want to work on both machines, and I really don't want to deal with the network ports being named differently on each machine. (the whole point of the machines is for them to be identical)

Any suggestions would be welcome.

~ Peaceful

Wormo

udev is reserving eth0 and eth1 for ethernets that have MAC addresses from your original box.

On the second box, edit /etc/udev/rules.d/70-persistent-net.rules and update the MAC addresses for eth0 and eth1 to match the HW address of the cards in that box.

peaceful · Apprentice Joined: 06 Jun 2003 Posts: 287 Location: Utah

nixnut · Posted: Fri Dec 14, 2007 6:19 pm Post subject:

merged above three posts here.
_________________
Please add [solved] to the initial post's subject line if you feel your problem is resolved. Help answer the unanswered

talk is cheap. supply exceeds demand