Previously, I had two offices connecting with 1720 routers, w/ VPN modules, across the Internet.
We just changed our ISP at one office and received
a 2600 to support dual T1 lines, one as a shadow
line, using BGP.
The 2600 doesn't have a VPN module so I want to
connect the two with a Enet WIC in order to use the
VPN module on the 1720, in which I am also using NAT.
Is the connection between the two a straight forward
Ethernet connection or does it have to use PPP?
I have working it now but I'm not sure if it's the
best config and worried about routing loops. In
addition, configuring CBAC on the 1720 in this setup
is a confusing task and I'm wondering if there isn't
a more practical solution for what I want to do.