From: Usankin, Andrew (Andrew.Usankin@twtelecom.com)
Date: Mon Oct 22 2007 - 15:58:21 ART
It really depends on your phone types. You need to figure out how much
power your phones consume and then you can hard code it to specific
number.
interface FastEthernet0/28
...
power inline static max 6300
What is happening by default you allocate 15.4 Watts per each port. But
unit has only 370 Watts available to share. So you stuck up to 15
powered ports only. If you do command "sh power inline" you will see
what I'm talking about.
It seems like you don't use Cisco IP phones, right? Because Cisco phones
talk to switch via CDP protocol extension and tell it how much power
they are willing to use. So if you do use Cisco IP phones indeed then
I'd make sure CDP is on on all ports, and then I'd try to hardcode power
again as I showed above (example provided is for 7940 IP phone). Please,
let me know if it helps.
Andrew
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
A.G. Ananth Sarma (GMail)
Sent: Sunday, October 21, 2007 10:54 PM
To: Cisco certification
Subject: Voice Query - Unable to use all the ports on 3560 to connect IP
Phones
Guys sorry or posting this here. Still I wonder if someone can help me
in this?
We have implemented IP Telephony in our company. We use 3560 PoE - 48
port switches.
When connecting more than 25 IP phones, it takes lot of time to boot the
IP Phones and sometimes they do not come up.
The configuration of ports are all same. Is there a known power issue
here?
Our Cisco dealer says so. Is there any way to tweak the config to
accommodate at least 40 ~ 45 IP phones. At present we spread the load in
to many 3560 switches with maximum of 25 phones on each.
Thanks in in advance.
Regards,
A.G. Ananthasubramania Sarma
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