Different Catalyst switches support different power redundancy capabilities. This section describes the power redundancy capabilities of the medium and high end Catalyst switches, such as the Catalyst 4500 and Catalyst 6500 series switches, and low end switches, such as Catalyst 3750 series switches.
Catalyst 4500 and Catalyst 6500 Power Redundancy
In addition to supporting redundant Supervisor Engines, Catalyst 4500 and 6500 series switches also support redundant power supplies. The redundant power supplies must be identical, and possess the same power input and output ratings. Cisco IOS software support two power redundancy modes in Catalyst 4500 and Catalyst 6500 . . .
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