[cisco-voip] Phone limits per server

Wed Mar 10 15:44:07 EST 2010

there is no n-1 compatibility, even with IPCCx. 

a separate IPCCx cluster, even if a pair of 7825s, allows you to upgrade your main cluster as many times as you want, just keeping an ICL to send calls across. 

--- 
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: "Matthew Saskin" <msaskin at gmail.com> 
To: "Lelio Fulgenzi" <lelio at uoguelph.ca> 
Cc: "steve siltman" <steve.siltman at assurant.com>, cisco-voip at puck.nether.net 
Sent: Wednesday, March 10, 2010 2:31:55 PM GMT -05:00 US/Canada Eastern 
Subject: Re: [cisco-voip] Phone limits per server 

Making sure we're clear - the recommendation (for multiple reasons) for a separate cluster is when using UCCE. UCCX/IPCCX doesn't (in my opinion) warrant a 2nd cluster - the versioning requirements are nowhere near as tight and the upper-bounds of scaling aren't a concern (300 agent max, etc.) 

Matthew Saskin 
msaskin at gmail.com 
203-253-9571 

July 18, 2010 - 1500m swim (in the hudson), 40k bike, 10k run 
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On Wed, Mar 10, 2010 at 1:35 PM, Lelio Fulgenzi < lelio at uoguelph.ca > wrote: 

Wow. We'll definitely have to take a look at things. No wonder people have talked about putting IPCCx agents on their own cluster in the past. Upgrade planning benefits aside, it sounds like a good idea. 

--- 
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: "steve siltman" < steve.siltman at assurant.com > 
To: cisco-voip at puck.nether.net , lelio at uoguelph.ca 
Sent: Wednesday, March 10, 2010 1:33:09 PM GMT -05:00 US/Canada Eastern 
Subject: Re: [cisco-voip] Phone limits per server 

I might be able to help with this as I've been working with Cisco on this very discussion for weeks. 

I'm using v7.x on 5 Clusters. I too read that these 7845 servers can support 7500 phones per server and 30,000 phones per cluster. Cisco told me that this is true in a perfect world 
but Call Center agents use CTI and 500 agents is the max per server with 2000 agents max per cluster. I freaked out because thats a 15:1 ratio. 

Another thing Cisco came back with is that if these agents use CVP and don't use an IP IVR then that number doubles to 1000 agents per server and 4000 agents per cluster. 

A little better but as Wes said, a massive performance hit. 

Here's more info: 
http://www.cisco.com/en/US/docs/voice_ip_comm/cust_contact/contact_center/ipcc_enterprise/srnd/75/c7ccmsrv.html#wp1061120 

In a deployment with Unified CM 7.0 and Unified CVP (no IP IVR), each Unified CM cluster (four primary and four backup subscriber servers) can support up to about 4,000 Unified CCE agents. This limit assumes that the BHCA call load and all configured devices are spread equally among the eight call processing servers with 1:1 redundancy. (See Unified CM Redundancy , for redundancy schemes.) Each of the eight Unified CM servers (MCS-7845-H2/I2 or later High Performance Servers) would support a maximum of 500 agents. In a failover scenario, the primary server would support a maximum of 1,000 agents. These capacities can vary, depending on your specific deployment. All deployments must be sized by using the Cisco Unified CM Capacity Tool or the Unified Communications Sizing Tool. 

Date: Wed, 10 Mar 2010 09:47:48 -0500 (EST) 
From: Lelio Fulgenzi < lelio at uoguelph.ca > 
To: Wes Sisk < wsisk at cisco.com > 
Cc: cisco-voip at puck.nether.net 
Subject: Re: [cisco-voip] Phone limits per server 
Message-ID: 
< 1338453699.2032011268232468344.JavaMail.root at simcoe.cs.uoguelph.ca > 
Content-Type: text/plain; charset="utf-8" 

When you say massive performance hit, what do you mean? Just a rough guess. 

Case in point, we have Unity Express boxes, IPCCx boxes. Does each CTI port shave the load capacity down by 100 phones or something? 

We also have a Cistera appliance that uses CTI super provider to monitor all 8000 phones or so. 

Steve Siltman 
Senior Network Engineer - Cisco CCVP 
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