Changing IP of CS and DMs

Use the following steps to achieve the IP address change: 

1. Stop proxy ARP. As root type:
   
   # /nas/sbin/clariion_mgmt -stop
     
2. Change control station IP address, subnet mask and gateway.
   
   Use Celerra Manager UI to perform the changes as usual. Login as root, go to the "Control Station Properties" tab and fill in the new IP settings as desired.
     
3. Start proxy ARP. As root type:
   
   # /nas/sbin/clariion_mgmt -start -spa_IP < new SPA IP address> -spb_IP -use_proxy_ARP
     
4. Perform checks. Ensure connectivity to the new SP and CS IP addresses. Issue the following commands and verify command reply:
   
   $ /nas/sbin/clariion_mgmt -info
     
5. Check proxy ARP status is "Started" and shown SP IP addresses are correct:
   
   $ nas_storage -c -a
   
   No errors should be returned, only "done"
     
6. Ping both SPs from Control Station and from customer's network.
   
   $ ping
   $ ping
   
   Both SPs should reply to the ping.
   
   $ /nas/sbin/navicli -h getagent
   
   No errors should be returned, only normal getagent output.
   
   $ cat /etc/hosts
     
7. Check if the host entries for CS eth3 and SPA/SPB have been updated with the correct IP addresses.
     
8. As last step, verify Celerra Manager and Navisphere Manager are reachable and working properly on a customer workstation.

  Caution!  Be aware that this procedure will reboot each storage processor twice. Make sure that every host has at least one functional path to each storage processor and appropriate multi-pathing software or settings to support path failover or HA. 

Alternatively, you can achieve the change by changing proxy ARP settings manually. The advantage is that the SPs are only rebooted once.

1. Change Control Station IP address, subnet mask and gateway
   
   Use Celerra Manager UI to perform the changes as usual. Log in as root, go to the "Control Station Properties" tab and fill in the new IP settings as desired.
     
2. Change SP IP addresses and proxy ARP settings manually.
   
   Refer to emc220238 on how to do that.