Chapter 5 DMVPN
Dynamic multipoint virtual private networks (DMVPNs) began simply as what is best described as hub-and-spoke topologies. The main tool employed to create these VPNs is a combination of Multipoint Generic Routing Encapsulation (mGRE) connections employed on the hub and traditional Point-to-Point (P2P) GRE tunnels on the spoke devices.
In this initial deployment methodology, known as a Phase 1 DMVPN, the spokes can only join the hub and they can only communicate with one another through the hub. This phase does not use spoke-to-spoke tunnels. The spokes are configured for Point-to-Point GRE to the hub and register their logical IP with the Non-Broadcast Multi-Access (NBMA) address on the Next Hop Server (NHS) hub.
This registration ...
Get CCIE Routing and Switching v5.1 Foundations: Bridging the Gap Between CCNP and CCIE now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
