We have a branch site set to upgrade from T1 to 20Mbps ethernet WAN. It currently has a 2811 router with no AIM module. The router is a DMVPN Spoke with AES256 encryption.
What router or 2811 upgrade do you recommend so I can maximize my throughout through the new 20Mbps link?
I see this document for the 2811 (peaks out at 8 Mbps with an AIM) but I don't see anything for the 2900 series.
http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/DMVPN_4_Phase2.html#wp91362
Thank you for any advice.