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Cisco IOS in a Nutshell, 2nd Edition by James Boney

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Name

tunnel checksum — interface

Synopsis

tunnel checksum
no tunnel checksum

Configures

The checksumming of packets on a tunnel interface

Default

Disabled

Description

This command enables packet checksumming on a tunnel interface. It applies to GRE tunnels only. When enabled, the router drops packets that fail the checksum test.

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