Useful for some Voice tests and Demo labs in virtual environments - and off course totally unsupported:

- boot the CUCM server with CentOS Disk1 (for me it was CentOS, you could use something else...

- type linux rescue at the boot: prompt

use the chroot command to change the root to the CUCM partition

- chroot /mnt/sysimage

edit the eth0 configuration file

- vim /etc/sysconfig/network-scripts/ifcfg-eth0

add or change the MACADDR variable in the ifcfg-eth0 file

- MACADDR=xx:xx:xx:xx:xx:xx

- save and close (or write and quit) with the :wq option inside vim

edit the hardware config file

- vim /etc/sysconfig/hwconf

change the network.hwaddr variable

network.hwaddr: xx:xx:xx:xx:xx:xx

- save and close with the :wq option inside vim

- exit Linux rescue mode

After all, test to see if it's OK now

- login at CM console

- show network eth0 detail...

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