There are five redundancy modules (also called mux buffers) and one clock module on the Catalyst 4507R-E and the Catalyst 4507R+E switch chassis backplane. The Catalyst 4510R-E and the Catalyst 4510R+E have eight redundancy modules on their backplane. They are accessible from the front of the chassis by removing all of the supervisor engines, switching modules, and blank slot covers. There are two types of redundancy modules, and they are interchangeable.
The clock module replacement procedure is identical to the redundancy module replacement procedure. Both the redundancy modules and the clock modules are not hot-swappable; the switch must be shut down to replace them.
To replace the backplane modules, follow these steps:
Step 1 Make sure that you are grounded with an ESD strap.
Step 2 Turn off the power to the chassis.
Step 3 Make a record of all network interface cable connections to the switch. Also, make a record of the switching modules and their slot assignments. This step will aid you when you return the system to operation after the removal and replacement procedure is completed.
Step 4 Disconnect all of the network interface cables to the switch and carefully set them aside.
Step 5 Remove all supervisor engines and switching modules from the chassis and carefully place each one in a separate antistatic bag or on an individual antistatic mat.