With Endian 2.5.1 a problem occured when backing up the existing configuration and attempting to apply to a dormant replica server.  What appeared to happen is when restored the network cards appeared to be added to the old ones, so instead of eth0,1 ,2 they were named eth 3, 4, 5.  So subsequently the green ip could not be accessed and current config would not work.
I found a bug report with the following useful info (credit to author!)

on shell:
press “0″ to access shell
type login and hit enter
You will be asked to provide password if you have setup one or the password of your old firewall from which you have acquired the backup tar file
Remove the businfotab under etc directory

cd /etc
rm businfotab
shutdown -r now and hit enter (will reboot the firewall)

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