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How to configure network-clock options on Cisco ISR series routers

Article ID: 604
Last updated: 29 Jul, 2021

Applies to:

Cisco ISR series routers


The standard "network-clock partecipate" and "select" commands -important for the good working of Digital Fax application- are not available on Cisco ISR series routers.


Please use the following commands to configure network-clock in your Cisco ISR series router:

  • configure terminal
  • network-clock synchronization automatic
  • controller [t1|e1] slot/bay/port
  • clock source line primary
  • network-clock input-source priority controller [t1|e1] slot/bay/port
  • exit

Article ID: 604
Last updated: 29 Jul, 2021
Revision: 3
Views: 2346
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