On a CentOS 6 machine, I have a server with 2 NICs, eth0 and eth1. eth0 has address 192.168.0.1.
I would like to create a script that parses the IP address of eth0 and assigns a similar-looking IPv6 address to eth1 at boot time.
In this case, I would like eth1 to have address fc00::192:168:0:1/64.
I know that in order to assign this address, I have to run the command
ip address add fc00::192:168:0:1/64 dev eth1
However, I'm trying to find a way to calculate the IP to be assigned to eth1 based upon the IP of eth0 and have this script run at boot-time.
The reason I'm doing this instead of statically assigning the addresses to both interfaces is that I'm attempting to turn this server into a VM template and automatically deploy it with new IP settings. Unfortunately the tool that I am using does not really have any support for IPv6.
So I guess my question has two parts:
- How do I calculate the IPv6 address to assign?
- How do I have this address calculated and assigned to eth1 at boot time?