Jabber Presence Bandwidth Requirements

[Carwyn Jones]

Does any body know where i can find documentation which explains clearly the Jabber Presence Bandwidth requirements.

I am looking to find information around how the number contacts increases presence traffic so this can be taken into account at remote sites with limited WAN tails e.g  5Mb or less.

I have an instance where signalling traffic has increased quite a bit since introducing the Jabber clients which appears to be presence traffic. in this case the customer is pre-loading 100+ contacts to the Jabber clients...

Also does anyone know of any methods which can be used to compress/reduce presence traffic e.g. use of a repeater or GRE tunnel which i have seen used in other vendor presence solutions.

[Jaime Valencia]

This is completely dependent on what you have configured, CUC, TMS, softphone, deskphone, number of contacts, etc. You need to do BW analysis of your environment to get baseline numbers.

[Carwyn Jones]

Thanks Jamie, this is a standard CUCM,CUC, IM & Presence ver 9.1 deployment, with Jabber Windows and Iphone Clients.

so sounds like as you load up more clients and contacts you need to keep doing a BW analysis to track the the impact of presence usage compared to a baseline?

are there any other tools of information we can use to better plan for this?

[Carwyn Jones]

I did find this document which has some calculations for interdomain presence. but it seems like there is nothing which covers single Domain deployment scenarios.

http://www.xmpp.org/internet-drafts/draft-saintandre-xmpp-presence-analysis-00.html

[Amit Kumar]

i found the following link which does explain a bit more;

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/9x/uc9x/presence.html

the following paragraph is important to note:

The traffic generated between Cisco IM and Presence clusters is directly proportional to the characteristics of the presence user profile. For example, assume presence user profile A has 30 contacts with 20% of the users on a local Cisco IM and Presence cluster and 80% of the users on a remote Cisco IM and Presence cluster, while presence user profile B has 30 contacts with 50% of the users on a local Cisco IM and Presence cluster and 50% of the users on a remote Cisco IM and Presence cluster. In this case, presence user profile B will provide for slightly better network performance and less bandwidth utilization due to a smaller amount of remote cluster traffic.

- Please rate if this helps.