Для симуляции использован GNS с Dynamips образом c7200-spservicesk9-mz.124-15.T7
Результат выполнения скрипта:
R1|7206VXR|C7200-SPSERVICESK9-M|PE|CDP is ON,2 peers|Clock in Sync
R2|7206VXR|C7200-SPSERVICESK9-M|PE|CDP is ON,2 peers|Clock in Sync
R3|7206VXR|C7200-SPSERVICESK9-M|PE|CDP is ON,2 peers|Clock in Sync
NTP|7206VXR|C7200-SPSERVICESK9-M|PE|CDP is OFF|Clock in Sync