CISCO IOS in a Nutshell

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Name

tunnel key — interface

Synopsis

tunnel key key
no tunnel key key

Configures

A key identifier for a tunnel

Default

None

Description

This command assigns a key to a tunnel. In this case, the key is just an integer that serves as a tunnel ID; it is not a cryptographic key. As such, it provides at best very weak security. The range for key is 0 to 4294967295.

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