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Dynamic IP Tunnel Overview

E-series routers support the following types of dynamic IP tunnels:

Generic Routing Encapsulation (GRE) tunnels
Distance Vector Multicast Routing Protocol (DVMRP) tunnels, also known as IP-in-IP tunnels

To establish a dynamic IP tunnel for GRE or DVMRP interfaces, you must configure a destination profile for a specific transport virtual router that is used to store tunnel configuration options, including the source and destination addresses of the dynamic IP tunnel.

A client application triggers the creation of dynamic IP tunnels based on the information stored in the GRE or DVMRP destination profile. The application specifies a tunnel source, tunnel destination, transport virtual router, and tunnel mode (GRE or DVMRP). If these parameters match those configured in the destination profile, the system creates the dynamic IP tunnel.

The application can automatically create an upper layer IPv4 interface over the GRE or DVMRP interface by using the IP characteristics defined in a profile referenced in the GRE or DVMRP destination profile.

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