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

Ahmed Elnagar ahmed_elnagar at rayacorp.com
Thu May 19 12:42:53 EDT 2011


For that number you better have a dedicated tftp server "could handle other service like MoH or so".

 

For mobility watch out that this server is end of sale and no mobility server with 8.5 anymore; CUCM 8.5 can handle mobility staff...however you don't have the ASA proxy with CUCM 8.5 hence you need to provide VPN access for remote phones.

 

My opinion; mobility function are not that amazing...I prefer Jabber application "I think that is the new name for mobile applications" with VPN access to the network like IPhone 8.0 it is amazing really and just register normally as long as you have WIFI connection "while on campus" or a VPN connection when working remotely.

 

Try to search for a comparsion between CUMA "mobility server's client" and IPhone Mobile 8.0

 

Best Regards,

Ahmed Elnagar | CCIE#24697 Voice

 

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Daniel Martin
Sent: Wednesday, May 11, 2011 5:50 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Subscriber and DHCP Servers for Expansion of CUCMCluster

 

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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