We have a Cisco IP phone which keeps rebooting and re-registering itself as a result.
The CDP neighbour information shows the phone is Class 4 PoE drawing 17.7w and its plugged into a Single (non stacked) 3750x Switch with a single
C3KX-PWR-715WAC power supply.
Now reading some Cisco documentation, it seems to suggest we need at least 1440w of total power to successfully power anything which requires more than the standatd 15.4w of power?
From the Cisco Website......
Q. Do I need two power supplies on the Cisco Catalyst 3750-X and 3560-X Series PoE switches to deploy PoE+ (802.3at)/UPOE?
A. The requirement for PoE+ is 1440W for a 48-port switch or 720W for a 24-port switch, in addition to the system power requirements, which include the reserved power needed to power up the Cisco StackPower stack during formation. This requirement already exceeds the rating of any available power supply; therefore, a second power supply would be needed unless the switch is part of a Cisco StackPower stack and the system can provide the remaining power required.
Does this mean we have to have 1440w to even run a single PoE+ device?
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...