UPS's in switch closets?

Answered Question
Jan 16th, 2012

Hello everyone! I am curious what everyone does in their standard client access

switch closet, do you have UPS's in every closet or do you have nice surge suppressors

to protect your client access switches?

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Correct Answer by Leo Laohoo about 2 years 3 months ago

All of our switches have UPS. 

Correct Answer by darren.g about 2 years 3 months ago

shocke@culver.org wrote:

Hello everyone! I am curious what everyone does in their standard client access

switch closet, do you have UPS's in every closet or do you have nice surge suppressors

to protect your client access switches? 

Sent from Cisco Technical Support iPad App

How big is your network, and how much money do you have to spend?

I've most recently been working on data-center sized networks, and they tend to be covered by large, center-wide UPS's with generator backup - the UPS and associated rectifiers isolate the protected kit from any chance of surges, so they're not needed on a rack-by-rack basis.

That's not a viable option for a smaller network or client base, so you sometimes need to think outside the box - one place I'm working on has two racks, one large UPS in the bottom of one rack and a PDU for each rack running the essential hardware (switches, servers, not monitors or non essential stuff) running off the one UPS.

There's no one size fits all solution - if you have widely distributed network closets/racks and don't want to put a UPS in each rack, your best bet might be getting switches with redundant power supplies and ensuring each supply runs off a separate electrical phase - since a lot of power outages only affect one phase at a time, you can often survive brief otuages on the secondary supply until the primary is restored.

Cheers

Correct Answer by vijaykhilnani about 2 years 3 months ago

Have a centralised ups feeding all the network switches located in different closets

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Correct Answer
vijaykhilnani Tue, 01/17/2012 - 07:00

Have a centralised ups feeding all the network switches located in different closets

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Correct Answer
darren.g Tue, 01/17/2012 - 15:42

shocke@culver.org wrote:

Hello everyone! I am curious what everyone does in their standard client access

switch closet, do you have UPS's in every closet or do you have nice surge suppressors

to protect your client access switches? 

Sent from Cisco Technical Support iPad App

How big is your network, and how much money do you have to spend?

I've most recently been working on data-center sized networks, and they tend to be covered by large, center-wide UPS's with generator backup - the UPS and associated rectifiers isolate the protected kit from any chance of surges, so they're not needed on a rack-by-rack basis.

That's not a viable option for a smaller network or client base, so you sometimes need to think outside the box - one place I'm working on has two racks, one large UPS in the bottom of one rack and a PDU for each rack running the essential hardware (switches, servers, not monitors or non essential stuff) running off the one UPS.

There's no one size fits all solution - if you have widely distributed network closets/racks and don't want to put a UPS in each rack, your best bet might be getting switches with redundant power supplies and ensuring each supply runs off a separate electrical phase - since a lot of power outages only affect one phase at a time, you can often survive brief otuages on the secondary supply until the primary is restored.

Cheers

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Posted January 16, 2012 at 5:15 PM
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