Things to be considered when swapping/changing FID/ICS machine IP's in Linux

Things to be considered when swapping IPs: (Put IP addresses of current servers to new servers)

1. Stop all the services on all 6 nodes ensuring no java processes are still running
   For Example.
   - ps-ef | egrep 'java|adm' (where adm is the application account on the server)
2. Ensure that the services are not configured to auto-start
3. Edit java.security to ensure networkaddress.cache.ttl=1
   (vi /opt/radiantone/vds/jdk/jre/lib/security/java.security)
4. Ensure hosts files of the new servers contain the NEW IP addresses prior to server
5. Shorten DNS TTL to something like 5 minutes
6. Configure DNS to swap IP
7. Configure Servers to swap IP (reboot required)
8. Ensure firewalld is running prior to starting services
9. Ensure all the required firewall ports are open
   - (ports 389,2389,636,1636,7171,7070,3888,2888,8090,2181,9101 -- if using all default ports)
10. Ensure that firewalld is now running as a service (if it wasn't before)
11. Check to see if there is any reference to the old IP in the server files
    (grep -R --exclude=*.log <old_ip> /opt/radiantone/vds/ |grep -v vds_server_access

After the change:

1. Set networkaddress.cache.ttl back to -1  after 48 hours
2. Set the DNS TTL back to 24 hours - set back from 5 minutes to 24 hour