Cisco IOS in a Nutshell, 2nd Edition

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Name

ip tcp mtu-path-discovery — interface

Synopsis

ip tcp mtu-path-discovery [age-timer minutes] [infinite]
no ip tcp mtu-path discovery

Configures

Path MTU discovery

Default

Disabled for most interfaces; special interfaces use 10 minutes

Description

This command enables or disables path MTU discovery on new TCP connections.

age-timer minutes: Optional. minutes specifies the interval after which the router recalculates the MTU; its value must be between 1 and 30.
infinite: Disables the age timer.

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