Hey, to keep it short, I've been given a practice exercise to build a small scale WAN simulation between an HQ and 4 branch sites secure tunneling and redundancy. SD-WAN and VPN servers are off the table, so are application based VPNs. I can only use Cisco routers and configure them manually. 1 ISP, 100Mbps. What WAN design would you recommend? Should I use MPLS or IPSec? BGP or OSPF? Any pointers are appreciated. ... View more