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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