What is Multipoint GRE (mGRE) and how does it work?

by | Nov 15, 2019 | CCNA, CCNP, CompTIA, Data Breaches and Prevention, Data Security, End Point Protection, Exclusive Articles, Network Security, VPN

mGRE Tunnel

Generic Routing Encapsulation (GRE) is a tunneling protocol that can encapsulate a number of OSI layer 3 protocols. This protocol can be used by two endpoints to communicate with each other. This protocol is developed by Cisco Systems and it can be used with IPSec to create a VPN. Multipoint GRE (mGRE) is a protocol that can be used to enable one node to communicate with many nodes. In other words, it can be used for point-to-multipoint links using which one node can transmit data to many nodes.

mGRE protocol is often used in Dynamic Multipoint VPN (DMVPN) which provides the ability to create a dynamic VPN network with multiple sites without having to pre-configure the tunnel end-point peers statically. In this article, we would discuss how the mGRE protocol works.

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Amrita Mitra

Author

Ms. Amrita Mitra is an author, who has authored the books “Cryptography And Public Key Infrastructure“, “Web Application Vulnerabilities And Prevention“, “A Guide To Cyber Security” and “Phishing: Detection, Analysis And Prevention“. She is also the founder of Asigosec Technologies, the company that owns The Security Buddy.

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