As I’m using a lot Virtualbox, I have often encountered the situation where I had to adapt the network adapters to follow some naming standards (to match my scripts 🙂 of course).
I’ve created some time ago a BASE VM where I deployed all the packages that I would possibly need for any ORACLE installation. On this BASE VM I have created 3 network adapters (1 bridged one and 2 host-only ones). Each time I need to create a VM, I’m just cloning the BASE VM – it saves A LOT of time. However, I still need to apply some changes, such as the hostname and network adapters.
So, here is what I did:
After the new VM is up&running, grab the MAC addresses first:
[[email protected] rules.d]# ifconfig | grep HWadd eth3 Link encap:Ethernet HWaddr 08:00:27:50:9C:9D eth4 Link encap:Ethernet HWaddr 08:00:27:B6:B4:99 eth5 Link encap:Ethernet HWaddr 08:00:27:B1:8F:0A [[email protected] rules.d]#
Go to /etc/udev/rules.d/ and edit 70-persistent-net.rules
This is what I have:
[[email protected] rules.d]# cat 70-persistent-net.rules # This file was automatically generated by the /lib/udev/write_net_rules # program, run by the persistent-net-generator.rules rules file. # # You can modify it, as long as you keep each rule on a single # line, and change only the value of the NAME= key. # PCI device 0x8086:0x100e (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:22:74:f9", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" # PCI device 0x8086:0x100e (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:b1:b2:5c", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2" # PCI device 0x8086:0x100e (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:89:47:fd", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1" # PCI device 0x8086:0x100e (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:50:9c:9d", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3" # PCI device 0x8086:0x100e (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:b6:b4:99", ATTR{type}=="1", KERNEL=="eth*", NAME="eth4" # PCI device 0x8086:0x100e (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:b1:8f:0a", ATTR{type}=="1", KERNEL=="eth*", NAME="eth5" [[email protected] rules.d]#
As you can see, the new names are eth3 – eth4 – eth5. I’m going to delete the previous ones and rename the new ones as eth0 – eth1 – eth2. My file is going to look like this:
[[email protected] rules.d]# cat 70-persistent-net.rules # This file was automatically generated by the /lib/udev/write_net_rules # program, run by the persistent-net-generator.rules rules file. # # You can modify it, as long as you keep each rule on a single # line, and change only the value of the NAME= key. # PCI device 0x8086:0x100e (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:50:9c:9d", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" # PCI device 0x8086:0x100e (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:b6:b4:99", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1" # PCI device 0x8086:0x100e (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:b1:8f:0a", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2" [[email protected] rules.d]#
The second step is to go here “/etc/sysconfig/network-scripts” and adapt the ifcfg-eth* files accordingly.
[[email protected] network-scripts]# ll ifcfg-eth* -rw-r--r--. 1 root root 231 Jun 18 2014 ifcfg-eth0 -rw-r--r--. 1 root root 231 Jun 18 2014 ifcfg-eth1 -rw-r--r--. 1 root root 231 Jun 18 2014 ifcfg-eth2 [[email protected] network-scripts]#
Delete in each file the UUID line, replace the MAC address with the one u get with “ifconfig | grep HW” and adapt the Name with a proper one.
The last step is to REBOOT the server and check the network adapters.
