Answer 1 is the correct one, R1 (CE router) needs a default route to forward all traffic to the ISP, and the ISP router should just have a static route routing back the packets destinated to the LAN connected to R1 back to R1.
A default route at the ISP is a wrong answer, it must be a specific route for the LAN of R1.
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...