Changing IP and subnet

Question

Hi, I wanted some advice on changing the ip addresses and subnet.

I have a group with 3 equallogics, currently the group ip and the individual ip addresses are in the same subnet as the main network (though separated on different switches). The management ports are not enabled. (Don't ask, it's just the way it is!!!)

What I want to do is change all the iscsi ports to another subnet, enable the management ports on the original subnet.

How do I best do this without downtime (if possible)?

Should I do the following

1. Change 1 nic on each server to the new subnet

2. Change eth1 on each equallogic to the new subnet

3. Change the Group IP to the new subnet

4. Connect targets in iscsi initiator on the servers to the new IP

5. Change the remainder of the nics on servers and equallogic to new subnet

6. Enable management nics on old subnet

Origin3k · Answer

I dont see how you can avoid a downtime. Also the plan needs some more steps if PS6110 are involved. Regards,Joerg

awesom-o · Answer

Ok thanks Don that's helpful.

When the group ip is changed, does that affect currently connected targets? Presumably not...

The two servers connected to the group are configured as a file server cluster. Would it work if I did the following on the NON active node

1. Removed the favourite targets

2. Change one port on each member to the new subnet

3. Change the Group IP address

4. Reboot server to remove connections

5 .Add the new group ip and targets

6. Reboot to have the server start with the new drive connections

7. Failover cluster and repeat on the originally active node.

thanks

Chris

awesom-o · Answer

Thanks Joerg. No think there must be some downtime. There's no PS6110 involved in this group.

awesom-o · Answer

You won't be able to do this live, even with clusters. As you change the IP addresses all connections there will be dropped. With the changed Group IP they won't be able to reconnect back to the group.

Sorry.

Don

Fair enough. I'll just have to plan some downtime for it. It should in theory be fairly quick anyway so not a huge issue. Thanks for your help.

EqualLogic

Changing IP and subnet

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