backup not working after changing ip

Hi,

I have 3 node cluster and a backup server, it was working fine.

I have changed the ip of all nodes and the cluster is working fine now but backup is not working.

when i run vbr.py i am getting an error 

" 
dbadmin@vertica1:~$ /opt/vertica/bin/vbr.py --task backup --config-file /home/dbadmin/fullbak.ini
Preparing...
Found Database port:  5433
Password:
Password:
ssh: connect to host xx.xx.xx.110 port 22: Connection timed out
Unable to ssh to host: xx.xx.xx.xx.110
backup failed!

"


This xx.xx.xx.110 is old ip of node2  i have recreated ini file but no change.

what should i do to fix this?

Thanks,
Najeeb