[cisco-voip] Subscriber and DHCP Servers for Expansion of CUCM Cluster

Wed May 11 17:08:11 EDT 2011

I believe phone and other device configurations are downloaded via TFTP, therefore must be run on a CUCM server.  In theory you could get the config files and put them on a third party TFTP but I’m not sure how reliable that would be.

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Lelio Fulgenzi
Sent: Wednesday, May 11, 2011 3:33 PM
To: Daniel Martin
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Subscriber and DHCP Servers for Expansion of CUCM Cluster

Yes, TFTP has to run on CUCM as far as I know. Infoblox had some sort of agent working a while ago, not sure if it ever got certification.

We have a dedicated TFTP server for our deployment of almost 8000 phones. I think it's a must.

---
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Cooking with unix is easy. You just sed it and forget it.
                              - LFJ (with apologies to Mr. Popeil)

________________________________
From: "Daniel Martin" <daniel.martin at cae.com>
To: "Ryan Ratliff" <rratliff at cisco.com>
Cc: cisco-voip at puck.nether.net
Sent: Wednesday, May 11, 2011 4:28:26 PM
Subject: Re: [cisco-voip] Subscriber and DHCP Servers for Expansion of CUCM Cluster

I am running v7.1.3 at this time.

I made an error in the initial post. I wanted to say TFTP and not DHCP. My mistake.

Cisco is telling me that the TFTP service has to run on a CUCM server. Is that correct?

Do you have dedicated TFTP servers or having that function off the same subscribers used for Call Agent process? This is for up 7000 phones.

Daniel.

From: Ryan Ratliff [mailto:rratliff at cisco.com]
Sent: Wednesday, May 11, 2011 12:14 PM
To: Daniel Martin
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Subscriber and DHCP Servers for Expansion of CUCM Cluster

What CUCM version are you on now and is an upgrade involved as part of this?

-Ryan

On May 11, 2011, at 11:49 AM, Daniel Martin wrote:

Hi,

I would like to get the community's feedback on Subscribers and DHCP Servers setup for a cluster of 6000-7000 phones. We currently have about 2000 phones running off two 7835 subscribers which are also the DHCP servers. The 7835 are old and must be replaced. We will be adding between 4000-5000 IP phones in the next 12-24 months for a total of about 6000. With softphone and mobility, that will go close to 7500 devices I project long term.

The cluster is located in the headquarters within multiple computer rooms.

What would be the recommended architecture for subscribers?
- Currently looking at having 3 x 7845 for Subs
- 2 CCM Groups to have all phones split 50-50
                CUCM Group1                   CUCM Group2
                Sub A                                    Sub B
                Sub B                                     Sub A
                Sub C                                     Sub C

What would be the recommended setup for DHCP service?
- Currently looking at having Sub C be the primary DHCP Server and have one of the other Subs as backup DHCP Server

As per Cisco Sales Support, I need two Mobility servers as well. Are other people using these? Recommendations?

Any feedback would be much appreciated.

Daniel.

Daniel Martin
Chef de Groupe – Gestion du Réseau des TI
Group Leader – IT Network Management
CAE Inc.
St-Laurent, Québec Canada
H4T 1G6
Tél:  1-514-341-2000 x4878
Fax: 1-514-340-5489
daniel.martin at cae.com<mailto:daniel.martin at cae.com>

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