CISCO IOS in a Nutshell

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Name

tunnel mode — interface

Synopsis

tunnel mode type
no tunnel mode type

Configures

The type of tunnel

Default

General Routing Encapsulation (GRE)

Description

This command sets the encapsulation mode for a tunnel. Values for type are given in Table 15-24. Both ends of the tunnel must use the same encapsulation type.

Table 17-11. Tunnel types

Tunnel type	Meaning
`aurp`	AppleTalk Update Routing Protocol
`cayman`	Cayman TunnelTalk with AppleTalk encapsulation
`dvmrp`	Distance Vectory Multicast Routing Protocol
`eon`	EON-compatible CLNS tunnel
`gre ip`	General Route Encapsulation (GRE) protocol over IP
`nos`	KA9Q/NOS-compatible over IP

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