I am in the situation of connecting two buildings with 2x34 Mbps links and I am being requested to encrypt the data traffic , but not teh voice traffic.
I have 4x3845s for this task and I have some ideas on how to do it , but if you can guide me in the right direction , maybe those of you that have already dealt with this !
The data transfer will consist in file copying on FTP or RDP sessions from one building to the other , cross backup between these sites only.
If you need to provide redundancy that does complicate the situation a bit. I think that you could probably set up IP SLA to track reachability through the other router at the site
I had thought about the suggestion of having the access list in IPSec VPN to identify interesting traffic deny voice traffic and permit data traffic and that is a very reasonable approach. If you took this approach perhaps you could then run some routing protocol which could detect when the other router at a site had lost its connection between sites.