Installation guide
4
Cisco Clock Module (WS-C6K-CL and WS-C6513-CL) and VTT Module (WS-C6K-VTT) Installation Note
78-10498-05
Replacing the VTT Modules and Clock Modules
• On systems running Cisco IOS software, enter the show environment status command.
This example shows how to check the status of the VTT modules and clock modules on a system
running Cisco IOS software:
Router> show environment status
backplane:
operating clock count:1
operating VTT count:2
...
VTT 1:
VTT 1 OK: OK
VTT 2:
VTT 2 OK: not OK
VTT 3:
VTT 3 OK: OK
clock 1:
clock 1 OK: not OK, clock 1 clock-inuse: not-in-use
clock 2:
clock 2 OK: OK, clock 2 clock-inuse: in-use
...
Router>
The above example shows a failure with clock module A (clock 1) and VTT module 2.
Replacing the VTT Modules and Clock Modules
This section consists of these subsections:
• Removing the Front Panel Safety Cover, page 4
• Locating the VTT Modules and Clock Modules, page 5
• Replacing the VTT Module, page 6
• Replacing the Clock Module, page 7
Removing the Front Panel Safety Cover
To replace the VTT modules or clock module, you must first shut down the switch and remove the front
(non-module) panel safety cover of the switch chassis.
Caution Always use an ESD wrist strap when handling modules or coming into contact with internal components.