2811, 2951 and NM-1T3/E3

[ddevecka]

Why don't they recommend you to use anything less than a 3925 with the T3 modules. We are getting ready to install a DS3 clear channel and my rep told me I needed new Routers. That would cost me about $30K, and it seems that the Module would work with my current gear. I have a 2811 at one end and a 2951 at the other end. I have a card in the 2811 and it seems to be seeing the module and be able to be configured. Just curios if I am missing something.

Thanks,

Dan

[Joseph W. Doherty]

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

What you might be missing is a 2811 can not handle a T3 at full rate.  From personal experience, had a 2811 hit 100% CPU at about 20 Mbps (duplex) across a T3.

Since a 2851 offers about twice the performance of a 2811, it's probably the smallest router that could "safely" handle a T3.

Although Cisco might recommend something faster than your 2951 for a full T3, since it's, I believe, faster than a 3845 which also was recommended for T3s, likely it will work fine.

Since even the 2901 is faster, I believe, than a 2851, any 29xx might be able to handle a single T3.