Gre Tunnels; Dvmrp Tunnels; Platform Considerations; Module Requirements - Juniper IP SERVICES - CONFIGURATION GUIDE V 11.1.X Configuration Manual

JUNOSe 11.1.x IP Services Configuration Guide

GRE Tunnels

GRE encapsulates IP packets to enable data transmission through an IP tunnel. The
resulting encapsulated packet contains a GRE header and a delivery header.
Consequently, the packet requires more processing than an IP packet, and GRE can
be slower than native routing protocols.
GRE tunnels can be secured with IPSec. See "Securing L2TP and IP Tunnels with
IPSec" on page 287.

DVMRP Tunnels

DVMRP tunnels allow the exchange of IP multicast traffic between routers separated
by networks that do not support multicast routing. For information about DVMRP,
see Configuring IPv4 Multicast in JUNOSe Multicast Routing Configuration Guide.
DVMRP tunnels can be secured with IPSec. See "Securing L2TP and IP Tunnels with
IPSec" on page 287.

Platform Considerations

For information about modules that support IP tunnels on the ERX7xx models,
ERX14xx models, and the ERX310 Broadband Services Router:
For information about modules that support IP tunnels on the E120 and E320
Broadband Services Routers:

Module Requirements

The supported modules for creating IP tunnels depends on the type of E Series router
that you have.

ERX7xx Models, ERX14xx Models, and the ERX310 Router

To create IP tunnels on an ERX7xx model, ERX14xx model, or an ERX310 router,
you must install a Service line module (SM) or a module that supports the use of
shared tunnel-server ports. For information about installing modules in the ERX
routers, see the ERX Hardware Guide.
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Platform Considerations
See ERX Module Guide, Table 1, Module Combinations for detailed module
specifications.
See ERX Module Guide, Appendix A, Module Protocol Support for information about
the modules that support IP tunnels.
See E120 and E320 Module Guide, Table 1, Modules and IOAs for detailed module
specifications.
See E120 and E320 Module Guide, Appendix A, IOA Protocol Support for information
about the modules that support IP tunnels.