Usually you take full BGP routing tables when you have multiple ISP links at a single site, either to load-balance outbound traffic between ISPs based on which ISP has a better route to a given destination, or to provide failover at the prefix level rather than the link level. (If ISP-A loses its route to a given network, it will withdraw that route from your BGP table so that you know to send traffic destined to that network to the other ISP. When using only a default route to each ISP, your router will never know about such a failure -- it only knows when the default route is withdrawn by the ISP or, more often, when the link itself goes down.)
So, given that you only have a single router/ISP link at each site, you probably don't need to accept full BGP tables. But it depends on what (if any) failover/load-balancing stuff you're doing. I see now, however, that 2691s can handle 256MB of memory (128MB is the limit for the rest of the 2600 series), so taking a full BGP table from each ISP shouldn't be a problem actually.
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
Q1: What are all the channel operational states from a BR (border role) perspective and what are the rules/conditions to be in each st...
The need was to reach an host inside a LAN through a VPN connection managed by the LAN gateway (Cisco 1921).
The LAN gateway performs NAT and there was a dedicate nat rule for the host i wanted to reach through VPN.
I couldn't connect to the hos...
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...