We did the following:
a. clone the original zimbra server after machine shutdown
b. assign new public/local ips to the new replicated machine

Getting the following error on zmcontrol start:
Failed to start slapd. Attempting debug start to determine error.
bind(7) failed errorno=99 ( Cannot assign requested address)
slap_open_listener: failed on ldap://<domain>:389

Searching on forums suggested to fix /etc/hosts file, which I did to have entry for new public ip and then performed a restart on the machine, still no luck. Suggestions most welcome please.