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.
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.
None of the ISRs, like a 2900 series, will support 100 gig.
At the moment, few and/or "high-end" Cisco devices support 100g (or 40g). For 100g, you might start looking at the ASR9k series if you need "router" features.