DMVPN

INE – MPLS L3VPN over DMVPN
English | Size: 500MB
Category: Tutorial

BGP/MPLS VPN was initially defined in RFC2547, which was later obsoleted by RFC4367 and updated by some other RFCs.
2547oDMVPN is also known as MPLS VPN over DMVPN. This solution extends MPLS VPN to the branches. The branches in this deployment are connected to the hub through a Layer 3 SP service, a tunneled model using GRE is needed to extend MPLS to the branches. DMVPN provides two key advantages for extending MPLS VPNs to the branches, bulk encryption and a scalable overlay model. DMVPN allows the hub to have a single multipoint GRE tunnel interface to support large numbers of spokes. Cisco recommends that to seamlessly extend the enterprise MPLS Layer3 VPN network to the remote branches(Spokes), the DMVPN hub should be a P device to label switching packets between the hub and the branches.