There is no way to predict hardware failure. The best you can do is to use a good tool like the Orion program and or ciscoworks if you have the money . Make sure you have applicable snmp traps turned on for the hardware and get things like power supplies fixed as they break. Things like a supervisor cards don't break that often . The highest failure items seems to be power supplies particularly on the 4500 series for some reason.
thank you for your fast & helpful reply and kindly be informed that I have already cisco works so could you please advice me how can I do that through cisco works?
Best Regards;
Hany Adel
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