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From: Mark C on 24 Nov 2009 13:30
We are still using several old 4006 chassis in our closets. They work fine,
have redundant power, and we have a few spare WS-X4148-RJ switch blades just
in case we lose one somewhere -- so there's been no real motivation to
upgrade.

Until now. One department wants VoIP. So we are looking into PoE switches.
The old 4006 "supports" PoE, but I think I'd have to buy the modules off
e-bay or something like that, which I'm reluctant to do.

So I'm wondering if it's somehow possible to use an x4648 PoE blade in the
4006 chassis. I'm guessing this won't work, but I can't tell from looking
at the specs if the power on the 4648 is actually on the blade itself, or if
it still resides on the chassis, say a 4506.

In short, I'm just looking to see if there is some way to use a single PoE
switch blade in my 4006 chassis, which does NOT currently have the auxiliary
power shelf or the power entry module.

Thanks


From: Doug McIntyre on 24 Nov 2009 14:44
"Mark C" <markc(a)askfordomain.ok> writes:
>We are still using several old 4006 chassis in our closets. They work fine,
>have redundant power, and we have a few spare WS-X4148-RJ switch blades just
>in case we lose one somewhere -- so there's been no real motivation to
>upgrade.

>Until now. One department wants VoIP. So we are looking into PoE switches.
>The old 4006 "supports" PoE, but I think I'd have to buy the modules off
>e-bay or something like that, which I'm reluctant to do.

>So I'm wondering if it's somehow possible to use an x4648 PoE blade in the
>4006 chassis. I'm guessing this won't work, but I can't tell from looking
>at the specs if the power on the 4648 is actually on the blade itself, or if
>it still resides on the chassis, say a 4506.

>In short, I'm just looking to see if there is some way to use a single PoE
>switch blade in my 4006 chassis, which does NOT currently have the auxiliary
>power shelf or the power entry module.


I can't answer your exact question, but running the older X4148-RJ45V
blades in a 4500 chassis will not light up the PoE capabilities of the
ports unless I have the proper power supply modules in the chassis
that supported supplying DC power to PoE modules. Not all power
supplies support PoE in the 4500 either. The ethernet portion of the
port works fine, but once it starts to receive a PoE request, it'll
refuse to do it because it doesn't have the power capacity, and that
will be logged.

I'd generalize the same would be true on the 4006 without the auxilary
power shelf add-on option.
From: Mark C on 24 Nov 2009 16:04

"Doug McIntyre" <merlyn(a)geeks.org> wrote in message
news:4b0c37b9$0$33859$8046368a(a)newsreader.iphouse.net...
> "Mark C" <markc(a)askfordomain.ok> writes:
>>We are still using several old 4006 chassis in our closets. They work
>>fine,
>>have redundant power, and we have a few spare WS-X4148-RJ switch blades
>>just
>>in case we lose one somewhere -- so there's been no real motivation to
>>upgrade.
>
>>Until now. One department wants VoIP. So we are looking into PoE
>>switches.
>>The old 4006 "supports" PoE, but I think I'd have to buy the modules off
>>e-bay or something like that, which I'm reluctant to do.
>
>>So I'm wondering if it's somehow possible to use an x4648 PoE blade in the
>>4006 chassis. I'm guessing this won't work, but I can't tell from
>>looking
>>at the specs if the power on the 4648 is actually on the blade itself, or
>>if
>>it still resides on the chassis, say a 4506.
>
>>In short, I'm just looking to see if there is some way to use a single PoE
>>switch blade in my 4006 chassis, which does NOT currently have the
>>auxiliary
>>power shelf or the power entry module.
>
>
> I can't answer your exact question, but running the older X4148-RJ45V
> blades in a 4500 chassis will not light up the PoE capabilities of the
> ports unless I have the proper power supply modules in the chassis
> that supported supplying DC power to PoE modules. Not all power
> supplies support PoE in the 4500 either. The ethernet portion of the
> port works fine, but once it starts to receive a PoE request, it'll
> refuse to do it because it doesn't have the power capacity, and that
> will be logged.
>
> I'd generalize the same would be true on the 4006 without the auxilary
> power shelf add-on option.

That makes sense. Thank you.


From: Andrey Tarasov on 25 Nov 2009 00:24
Doug McIntyre wrote:
> "Mark C" <markc(a)askfordomain.ok> writes:
>> We are still using several old 4006 chassis in our closets. They work fine,
>> have redundant power, and we have a few spare WS-X4148-RJ switch blades just
>> in case we lose one somewhere -- so there's been no real motivation to
>> upgrade.
>
>> Until now. One department wants VoIP. So we are looking into PoE switches.
>> The old 4006 "supports" PoE, but I think I'd have to buy the modules off
>> e-bay or something like that, which I'm reluctant to do.
>
>> So I'm wondering if it's somehow possible to use an x4648 PoE blade in the
>> 4006 chassis. I'm guessing this won't work, but I can't tell from looking
>> at the specs if the power on the 4648 is actually on the blade itself, or if
>> it still resides on the chassis, say a 4506.
>
>> In short, I'm just looking to see if there is some way to use a single PoE
>> switch blade in my 4006 chassis, which does NOT currently have the auxiliary
>> power shelf or the power entry module.
>
>
> I can't answer your exact question, but running the older X4148-RJ45V
> blades in a 4500 chassis will not light up the PoE capabilities of the
> ports unless I have the proper power supply modules in the chassis
> that supported supplying DC power to PoE modules. Not all power
> supplies support PoE in the 4500 either. The ethernet portion of the
> port works fine, but once it starts to receive a PoE request, it'll
> refuse to do it because it doesn't have the power capacity, and that
> will be logged.
>
> I'd generalize the same would be true on the 4006 without the auxilary
> power shelf add-on option.

It's even easier than that - this line card requires -E chassis and -E
supervisor. 4503-E, 4506-E, 4507R-E and 4510R-E with either Sup6-E or
Sup6L-E.

Since money seems to be a problem, standalone PoE switch might be a
better solution. Something along the lines of Catalyst Express line...

Regards,
Andrey.
From: Jasper Janssen on 27 Nov 2009 06:41
On Tue, 24 Nov 2009 21:24:46 -0800, Andrey Tarasov <andyvt(a)email.com>
wrote:

>Since money seems to be a problem, standalone PoE switch might be a
>better solution. Something along the lines of Catalyst Express line...

If you don't need extra ethernet ports, there are multiport midline PoE
injectors which will simply add PoE capabilities to existing ports.

Check power requirements carefully.

Jasper
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