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

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Name

hssi internal-clock — interface

Synopsis

hssi internal-clock
no hssi internal-clock

Configures

Use of the internal clock

Default

Disabled

Description

This command configures an HSSI interface to provide a 45 MHz master clock. It is used when two HSSI interfaces are connected via a null modem cable; one of the two interfaces must provide a clock signal on the link. Both interfaces cannot provide clocks, so use this command only on one side of the link.

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