[cisco-voip] Practical Limit on number of phones per server

[Bill Talley]

Keep failover ratios in mind as well.  As an example only,  if you  
have three 7825 servers, with 800 phones registered to each of the two  
subs, you won't be able to support failover for all 1,600 phones  
without registering a majority to the pub.  Without throwing best  
practices aside, this probably isn't a realistic scenario, but just  
wanted to emphasize that failover requirements impact server sizing.

Sent from a mobile device with very tiny touchscreen input keys.  
Please excuse my typos.

On Mar 26, 2010, at 11:08 AM, Matthew Saskin <msaskin at gmail.com> wrote:

> Maybe so - ask your SE very nicely to run some calculations with  
> you :)
>
> The short answer is that doing a calculation of the impact of all  
> things on a cluster is complicated and there aren't any (publicly  
> available that I've seen) formulas for doing so, it's all tied up in  
> the sizing tool.
>
> Having spent most of my career at non-partners, generally if you  
> keep at some percentage (say 20%) underneath the recommended  
> maximums for an average use cluster, you shouldn't run into issues  
> (at least I never have).  Things get more difficult when you have  
> UCCX or UCCE in the mix, so keep that in mind.
>
> Matthew Saskin
> msaskin at gmail.com
> 203-253-9571
>
> July 18, 2010 - 1500m swim (in the hudson), 40k bike, 10k run
> Please support the Leukemia & Lyphoma Society
> http://pages.teamintraining.org/nyc/nyctri10/msaskin
>
>
> On Fri, Mar 26, 2010 at 11:15 AM, Lelio Fulgenzi <lelio at uoguelph.ca>  
> wrote:
> dang. still partner access only i'm guessing.
>
>
>
> ---
> 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: "Syed Khalid Ali" <syed.khalid.khursheed at gmail.com>
> Cc: cisco-voip at puck.nether.net
> Sent: Friday, March 26, 2010 10:32:25 AM GMT -05:00 US/Canada Eastern
> Subject: Re: [cisco-voip] Practical Limit on number of phones per  
> server
>
> The number of phones supported on a given server platform is going  
> to vary based on a numer of elements including gateway/endpoint  
> count, route list count, CTI usage, etc.  To get a close feel, you  
> should be using the CallManager Capacity tool or the new UC sizing  
> tool - http://tools.cisco.com/cucst
>
> In practive, I've seen many customers with 5K+ phones registered to  
> a 7845 class server, they were very light in CTI usage however.
>
> Matthew Saskin
> msaskin at gmail.com
> 203-253-9571
>
> July 18, 2010 - 1500m swim (in the hudson), 40k bike, 10k run
> Please support the Leukemia & Lyphoma Society
> http://pages.teamintraining.org/nyc/nyctri10/msaskin
>
>
> On Fri, Mar 26, 2010 at 10:25 AM, Syed Khalid Ali <syed.khalid.khursheed at gmail.com 
> > wrote:
> Group:
>
> 1. What is the practical limit on the number of phones per server.  
> Till now the total number of end-point are 300 (approx)
> 2. The datasheet states that 1000-phones per server are supported
>
> We are running:
> MCS 7825-H2
> CCM 4.2(3) [1-publisher, 1-subscriber]
> IPCCX 4.0
> - IPCCX is co-resident on Publisher
>
> -- 
> Thanks,
> Syed Khalid Ali
>
>
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