When you install more than 1 Linux server at a site, it often happens that the patched interfaces get a different interface name. I’ll try to explain in this blogentry how to get them renamed correctly.
What we want
eth0 LAN 1Gb
eth1 LAN 1Gb
eth2 STORAGE 10Gb
eth3 STORAGE 10Gb
What we have
We installed 3 brand new servers and when we detect the interfaces :
# ifup eth0-9
# ethtool eth0-9
It results in the following mixed up configuration
– Server A
eth0 LAN 1Gb
eth1 LAN 1Gb
eth2 STORAGE 10Gb
eth3 STORAGE 10Gb
– Server B
eth2 LAN 1Gb
eth3 LAN 1Gb
eth8 STORAGE 10Gb
eth9 STORAGE 10Gb
– Server C
eth2 LAN 1Gb
eth3 LAN 1Gb
eth4 STORAGE 10Gb
eth5 STORAGE 10Gb
How To Correct it?
1) Adjust the /etc/udev/rules.d/70-persistent-net.rules file by interchanging the interfacenames. ( f.e. change eth2 to eth0 and viceversa )
2) Adjust the mac adress in the ifcfg-ethx config files in /etc/sysconfig/network-scripts.
3) reboot
Hope this helps somebody.
Oracle in the field 