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ewilliamson100
Contributor
Contributor

Changing IP Address range

We are going to be introducing VLans over the next month and as part of the project the entire network has to be re-ip'd. We have VSphere 5 \ESXi 5.

I'm really looking for some advice on where to start and how I go about changing the ip's of the Hosts. The network was setup by a third party company so I'm a at a bit of a loss as to where to start and any help would be gratefully received.

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vmroyale
Immortal
Immortal

Hello and welcome to the communities.

Check out http://kb.vmware.com/kb/1006710 for info on how to change the ESXi hosts and start with http://kb.vmware.com/kb/1001493 for vCenter Server. There will likely be much more to this though, depening on what other networking is in use. Any VM networks, IP storage, etc may have to be changed as well.

Good Luck!

Brian Atkinson | vExpert | VMTN Moderator | Author of "VCP5-DCV VMware Certified Professional-Data Center Virtualization on vSphere 5.5 Study Guide: VCP-550" | @vmroyale | http://vmroyale.com
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djradium
Enthusiast
Enthusiast

Actually we are performing the same task as yourself. Today we re-iped our hosts. First make sure that your back end network is setup in preparation for it with regards to knowing your vlan structure. Ensure that your Vlans are configured correctly, I.e gateways, trunking etc.

First we VMotioned the vms of the first host onto another before reconfiguring the network on it as unfortunatley the default gateway for *everything* in our domain was our firewall and not our net switches.We changed our management networks first by adding a second management network ( there was no redundancy ) and associated that to the new host vlan. Then we changed the setting of the first management network to point to the new host vlan, this brought our hosts into the new subnet scheme we wanted.

We left our SANsnetwork config along as its on an isolated network. Next phase for us will be the re-ip of the domain controllers but we have the vmnetworks setup already and we can't see any issues that were not resolved in test.

However , I would recommend that you document you new proposed network layout and test config changes before going live if you can. Preparation is key.

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