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

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Name

clock calendar-valid — global

Synopsis

clock calendar-valid
no clock calendar-valid

Configures

Network Time Protocol (NTP)

Default

Disabled

Description

This command tells the router to consider the RTC calendar in hardware to be a valid source of time. This command is valid only on high-end routers (5000, 6000, 7500, 8500, etc.).

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