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New Member

PC asking for Power?

Has anybody seen it before where a PC is requesting inline power - and then the link flaps because of it? I don't know if it's my 3560 or the PC but I think it's the PC.

7 REPLIES
Silver

Re: PC asking for Power?

I never heard the PC require inline power, because the PC will also plug to the power socket to draw the power, it should not draw the problem from the switch. Do you mean the USB network adapter ?

Any error log from the 3560 ? Any why you suspect it is PC inlinw power issue ? Please explain more.

New Member

Re: PC asking for Power?

Yeah, this is a PC that is plugged into the wall outlet, but when I watch the log -it's also showing a request for power on the FE port of the switch - and getting it granted. It's weird.

New Member

Re: PC asking for Power?

I have had situations where the switch has turned up inline power with no PoE device on the other end. I suspect that this is due to cross compatibility issues wit Cisco native power provisioning algorythm and 802.af standard.

Cisco reccomends dissabling power in interfaces that are know not to have an PoE cappable device attached.

"Switch(config-if)# power inline never"

New Member

Re: PC asking for Power?

that's what I ended up putting in there, but that kind of shoots me if somebody ends up putting a 7960 or 7970 in there later. I just was wondering if anybody else had seen it and what it was from. Thanks!

Silver

Re: PC asking for Power?

I think there is no way to re-enable it manually. However, if connect an IP phone to the switch but not work, we normally check the power at once.

Silver

Re: PC asking for Power?

Sorry or typo. I mean I think there is no way not to re-enable it manually.

New Member

Re: PC asking for Power?

What rev of IOS are you running?

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