[cisco-voip] Migrating from v7 to v9 (same cluster IPs) - getting phones to recognize new v9 cluster

[Matthew Loraditch]

I operate in environments no larger than 1000 phones but I have never changed IPs. I just shut down the old servers switch ports. As long as we do firmware ahead of time, the change hasn’t taken longer than 30 minutes. Some older routers have needed a manual kick in the pants to switch over to the new servers but it’s usually very easy. Occasionally a phone needs a factory reset. We can also revert if need be.  It’s a lot less work to shut down some switch ports than it is to setup a bunch of ACLs, reprogram DHCP scopes and dial peers, mgcp, etc. Since the new servers are VMs you can just change the network on their adapter from your lab vlan where you’ve upgraded and restored from backup to your production vlan.

The biggest concern would be if you have to revert, you are going back to before Security by Default. If you need to prepare for that it would probably be setup the new cluster with rollback enabled until you are sure everything is working. There are plenty of caveats to that, but I think we’ve covered them on the list.

HTH!


Matthew G. Loraditch – CCNP-Voice, CCNA-R&S, CCDA
1965 Greenspring Drive
Timonium, MD 21093

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From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Lelio Fulgenzi
Sent: Thursday, January 23, 2014 3:43 PM
To: cisco-voip voyp list
Subject: Re: [cisco-voip] Migrating from v7 to v9 (same cluster IPs) - getting phones to recognize new v9 cluster

ok, i needed to wait, just a bit longer... 8 1/2 minutes before the phones re-request their cnf file.

I'm still interested in hearing what others have done.
________________________________
From: "Lelio Fulgenzi" <lelio at uoguelph.ca<mailto:lelio at uoguelph.ca>>
To: "cisco-voip voyp list" <cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>>
Sent: Thursday, January 23, 2014 3:40:06 PM
Subject: Migrating from v7 to v9 (same cluster IPs) - getting phones to recognize new v9 cluster

So, still planning our v7 to v9 migration. The last time we did this, we went from v4 to v7 and changed the IP addresses of the servers. To ensure phones would go that way, we applied an ACL which blocked access to the servers, which forced a DHCP and they brought down the new TFTP address and voila, things went well.

I was thinking of doing something similar during my migration to v9. In my testing of the ACLs though (still on v7), I noticed that the phones are not really bringing down a new copy of their configuration, just re-registering.

I still have to test how phones behave when I complete the process, i.e. block ACL, unplug v7, plug in v9, allow ACL.

Will the server and phone communication be sufficient to tell the phones to download a brand new configuration file?

What have others done to migrate their phones from v7 to v9 when using the same cluster IPs?

Lelio


---
Lelio Fulgenzi, B.A.
Senior Analyst, Network Infrastructure
Computing and Communications Services (CCS)
University of Guelph

519‐824‐4120 Ext 56354
lelio at uoguelph.ca<mailto:lelio at uoguelph.ca>
www.uoguelph.ca/ccs<http://www.uoguelph.ca/ccs>
Room 037, Animal Science and Nutrition Building
Guelph, Ontario, N1G 2W1


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