MNHA ADVPN in node-local tunnel deployment

Node-local tunnels enhance Multi-node High Availability (MNHA) by providing separate tunnels from a VPN peer device to both nodes in the setup. Auto Discovery VPN (ADVPN) allows VPN tunnels to be established dynamically between spokes. Combining ADVPN with MNHA in node-local tunnels deployment ensures robust network connectivity, efficient resource utilization, and seamless failover capability.