The ISR4400 series may also support your requirements.

If Site A (172.31.32.120/29) can reach Site B (172.30.32.120/29) across the tunnel but not the downstream 172.12.30.0/24, try the following if using static routing: On the Site A router configure:  ip route 172.12.30.0 255.255.255.248 <ip of the loca...

I agree with those above.  If you want to see who you are peering with run sh ip bgp sum.  This will tell you how many prefixes your are receiving from a given peer.  Run sh ip bgp nei x.x.x.x adv to see which routes you are advertising and sh ip bgp...

Awesome!Thank you both for the quick response!