I have a Cisco router (c1921) that travels around the country and plugs into different networks (hotels, convention centers, etc..).
We of course have issues when the DHCP WAN IP address we receive from the venue conflicts with the LAN networks.
We are thinking of using VRF to fix this issue.
I am looking for a good sample configuration with the WAN interface on the router is getting an IP address via DHCP (mostly private 172.16.x.x, 192.168.x.x and 10.x.x.x networks), and the LAN has multiple subinterfaces for dot1q VLANs.
I do have a Cisco EZVPN that connects to our datacenter, so this would still need to work.