Table of Contents
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Chapter 9
Configuring IP Tunnels
Overview
IP tunnels provide a way of transporting datagrams between routers separated by
networks that do not support all the protocols that those routers support. This chapter
describes how to configure IP tunnels on E Series routers; it contains the following
sections:
Overview on page 245
Platform Considerations on page 246
References on page 247
Configuration Tasks on page 248
Monitoring IP Tunnels on page 253
E Series routers support static IP tunnels. An IP tunnel is a virtual point-to-point
connection between two routers. See Figure 19 on page 245. To establish an IP tunnel,
you specify a tunnel type and name, and then configure an interface on each router
to act as an endpoint for the tunnel.
Figure 19: IP Tunneling
T unne l
Sou rce
Data
E Series routers support the following types of IP tunnels:
Generic Routing Encapsulation (GRE) tunnels
Distance Vector Multicast Routing Protocol (DVMRP) tunnels, also known as
IP-in-IP tunnels
Destination
245
Overview
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