Since the router is originating all the rtp packets, I think it boils
down to the pps the router can process switch. If each call is 50 pps
(20 ms sample) and the 2811 can do about 3000 pps process switched or
about 60 calls.
So maybe 3 PRIs?
On Sep 23, 2009, at 8:26 PM, Michael Ciarfello wrote:
Each ISR router is supposed to only be able to handle X number of
PRIs (not physical, more CPU / resource load wise.) I would work
with your Cisco AM to have them help you detemine what the limits
and loading are.
I can't find what documents discussed it. I know I came across a
third-party testing report (Mircom maybe.) that had like max 4 PRIs
on a 2811. My number might be off, but there was a limit. That's
why I would suggest working with your Cisco AM--they should be able
to help with those numbers.
If you are a partner, the PDI helpdesk should be able to help. If
not, then that's what the AM will help you with. Not sure if TAC
would assist with these design questions, but you can always try.
From: ccie_voice-boun...@onlinestudylist.com [ccie_voice-
boun...@onlinestudylist.com] On Behalf Of Nara Shikamaru
[shikam...@kagadis.com]
Sent: Wednesday, September 23, 2009 12:01 PM
To: OSL Group
Subject: [OSL | CCIE_Voice] Choosing the right ISR?
Okay, my question is not really out of the modules, just a question
about a real world scenario. I'm preparing to increase the size of
our VoIP network and am aware of the principle differences between
the ISRs. Our remote sites will have subscribers, so SRST is not
really an issue, and the ISRs are only being used to terminate PRIs
and will not be used to route data VLAN traffic. This being the
case, are there caveats to using 2811 routers with 8 VWIC ports? I
don't really know what to expect by way of offnet traffic, but have
had success with the 2811 line and am wondering if I can repurpose
for the new network and not have too much to worry about.
Also, I am planning on configuring some hardware conferencing but I
have no idea yet how popular it will be, no transcoding is planned
as our sites are currently all on G711.
--
-Shikamaru
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