[cisco-voip] Phone limits per server

[Matthew Saskin]

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
> *<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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