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.