| OID | 1.3.6.1.4.1.9.9.121.1.1.9 |
| Module | CISCO-ATM-NETWORK-CLOCK-MIB (CISCO) |
| Nom | cncRootClockSource |
| Acces | readonly |
| Status | current |
| Description | The entPhysicalIndex of the network clock source that is actively supplying network clock within the device. |
| Syntaxe | PhysicalIndex (ENTITY-MIB) |