DMVPN – Dynamic Multipoint Virtual Private Network 🔐🌐
DMVPN is a Cisco VPN technology designed to connect multiple branch sites securely using dynamic tunnels — without configuring point-to-point VPNs for every location.
Instead of managing hundreds of static tunnels, DMVPN builds them on demand.
How DMVPN actually works (no theory):
mGRE → Single tunnel interface, multiple dynamic peers
NHRP → Resolves private tunnel IPs to public WAN IPs
IPsec → Encrypts all traffic end-to-end
DMVPN Phases (know this for interviews):
Phase 1: Hub-and-Spoke (all traffic via hub)
Phase 2: Dynamic Spoke-to-Spoke tunnels
Phase 3: Optimized routing with NHRP redirect
Why...
25.01.2026 / 18:23
DMVPN is a Cisco VPN technology designed to connect multiple branch sites securely using dynamic tunnels — without configuring point-to-point VPNs for every location.
Instead of managing hundreds of static tunnels, DMVPN builds them on demand.
How DMVPN actually works (no theory):
mGRE → Single tunnel interface, multiple dynamic peers
NHRP → Resolves private tunnel IPs to public WAN IPs
IPsec → Encrypts all traffic end-to-end
DMVPN Phases (know this for interviews):
Phase 1: Hub-and-Spoke (all traffic via hub)
Phase 2: Dynamic Spoke-to-Spoke tunnels
Phase 3: Optimized routing with NHRP redirect
Why...