[cisco-voip] Fw: CUCM cluster capacity

[Damian Turburville]

Can anyone help with this at all? I would use the cisco sizing tool but it is only available to partners annoyingly.
Thanks,
Damian


----- Forwarded Message -----
From: Damian Turburville <d_turburville at yahoo.com>
To: "cisco-voip at puck.nether.net" <cisco-voip at puck.nether.net>
Sent: Wednesday, 3 August 2011, 16:57
Subject: [cisco-voip] CUCM cluster capacity


Hi,
I realise this can depend on a lot of factors but I am looking for a rough figure for capacity (no. of users) on a CUCM 6.1 cluster consisting of

Publisher - 7825-H3
Subscriber1 - 7825-H3
Subscriber2 - 7835-I2

Now according to the SRND a 7825 server can handle 1000 users per server and a 7835 can handle 2500, does that mean in the above example that I can have 4500 users? Or should I only count the Subscribers for a total of 3500 or should I base it on the capacity of the Publisher for a total of 1000.
Also in the above example what would happen if I have 3500 users and Subscriber2 goes down, would the system fall over entirely as it would be trying to support 3500 users with much less capacity?

Many thanks for any help with this,
Damian

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