DMVPN Phase 2 Configuration Explained

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DMVPN stands for Dynamic Multipoint VPN. It is a technique where we can build a VPN network on hub-spoke topologies dynamically without having the need to configure the devices statically. DMVPN also supports IPsec encryption and hence is a popular technique for building tunnels over internet connectivity thus acting as an alternative to MPLS connectivity solutions. DMVPN is usually deployed in HUB and Spoke topologies. Hub has a single multipoint tunnel interface and all the spoke sites have a single point-point tunnel interface with Hub site.

DMVPN has three phases and in this post we will discuss the first DMVPN phase. In 1st phase there can’t be any Spoke to spoke communication directly. Any spoke that needs to speak to another spoke site has to go through a Hub site in phase 1.

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