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

[Lelio Fulgenzi]

With regards to DHCP servers, I think many people on the list have said that while it will work, DHCP services on anything > v4 are minimal. v4 had MS/Windows DHCP services which are pretty good. 

You didn't mention software version. 

--- 
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) 


----- Original Message -----
From: "Daniel Martin" <daniel.martin at cae.com> 
To: cisco-voip at puck.nether.net 
Sent: Wednesday, May 11, 2011 11:49:50 AM 
Subject: [cisco-voip] Subscriber and DHCP Servers for Expansion of CUCM Cluster 




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 


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