How To Avoid Downtime From PoE Switches?

It seems easy for the other components of the video system to have redundancy via either clustering, or virtualization. However, the vulnerability that I'm curious about is the PoE switch that has all the cameras connected to it providing it power and data. If that switch goes out, essentially all the cameras are down.

I've been thinking of splitting half the cameras on one PoE switch, and half on another PoE switch so at least if one goes down, we have some video. Is there a better solution?

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