[c-nsp] Cisco RPS for 3550 switch

[Robert Boyle]

At 03:21 PM 10/1/2007, you wrote:
>The RPS-600 was so much better than what's being passed off as a
>"redundant" power supply these days... I never bothered using the AC
>input on the device when it was hooked up to a RPS-600 since it had dual
>AC and you could use the dual-head RPS cable to give it redundant DC
>feeds. Truly a redundant power solution for the rest of us. (Totally
>ignoring the 2948G-L3, of course.)

I agree. The RPS-600 could also power many devices at once. We used 
to have 3640s, 2924s, and 3620s hooked up at the same time. The 
RPS-300 will only protect one device from a failed power supply 
despite its multiple outputs. Only one can be active at a time. It is 
useless in a redundant A/B power feed scenario unless you buy one 
RPS-300 per device you need to protect. We have also seen the problem 
that it reboots the switch on failback regardless of whether the RPS 
power is pulled or the button is used. This was one big reason we 
switched to Dell GigE switches wherever we needed a small switch with 
redundant power. The irony is that Dell's four active output RPS-600 
has the same model number as the old Cisco device which worked so 
well. Cisco should make at least one 1U switch with real dual power 
built into the chassis or bring back a real RPS.

-Robert



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