Reserving public and private IP on a Cisco Meraki vpn concentrator

Question

Hi.
Meraki has informed us that we have to swap out the current VMX-100 with a new VMX image. The current virtual Meraki has many route tables assigned, using the current private IP and several site tunnels using the public IP.

I really want to keep the IPs I have for the old Meraki and assign them to the new one.

I posted this question on the Meraki page and was told I would lose both public and private IP when I made the switch from old Meraki to new.

My question is:

What if I were to reserve both the public and private IP for the old meraki that I'm replacing. Then I stand up the new one, turn the old one off, disassociate the ips from the old one and assign them to the new one. Will that work? I understand traffic will be temporarily halted between meraki changes but this will be done in the middle of the nite so shouldnt have a problem as far as traffic goes

Thanks in advance
Sharyn

PS: this isnt a web app, it's a Meraki VM but that tag was the closest I could find.

Answer 1

Hi, @Anonymous you have full control of your private IP so you should be able to retain, or at least update after the fact to the original private IP.

However, with Public IPs, unless part of an IP Prefix, your point here - "disassociate the ips from the old one and assign them to the new one" - is where you will lose the existing Public IP.

The actual IPv4 address is assigned to the resource at allocation. Hence, deallocation will cause it be returned to the pool. There is no workaround for this at present.

Joe