Power up E501s Ap with cnMatrix EX2028-P

Products cnMatrix
2

Hello, here is some information on the POE capabilities of our cnMatrix switches.  I've also attached some reference information.  It is possible to do what you are trying to do, but the consideration is overall power budget.  My numbers assume that you are not using the POE out from the E501s.  Also, on the EX2028P, there are only 24 POE enabled ports, so you will be limited to 6 cameras.  The other 4 are uplink ports.

Typical draw of E501s = 8W (max 12.95W with no aux port being used)

Rounded up to 13W x 18 devices = 234W for the E501s

802.3af class 3 also has a max of 12.95W http://www.veracityglobal.com/resources/articles-and-white-papers/poe-explained-part-2.aspx

6 cameras x 13W = 78W

234W + 78W = 312W, which is less than the max budget (400W) for the EX2028-P, so you are good.  We can also prioritize the POE availability.  See below.

cnMatrix info:

• PoE (Power Over Ethernet)is used to power various devices connected directly to the switch via the copper ports (like Wireless Access Points, IP Cameras, VoIP Phones etc) over standard Ethernet CAT5 or CAT6 cables
• It supports 802.3afand 802.3atstandards, offering thus the possibility to deliver up to 30W per port
• The PoE power budget, or available power, depends on the model of the switch:
     •  400W for EX2028-P
     • 100W for EX2010-P
• PoE is enabled by default, both globally and per-port
• Devices will be powered-up regardless of the administrative state of the port, i.e. PoEworks even if the port is in shutdown state
• PoE configurations can be done only from the CLI for the moment
• PoE priority can be configured on a per-port basis. Available options are: critical, high and low. Low is also the default
• When power budget is exceeded, ports will be denied power based on their priority. If the decision has to be made between ports with equal priority, the biggest port number will be denied power

Configuration Examples:

• Modify priority on a port
     • cnMatrix(config)#interface gigabitethernet0/1
     • cnMatrix(config-if)#power inline priority critical
• Disable PoE on a port
     • cnMatrix(config)#interface gigabitethernet0/1
     • cnMatrix(config-if)#power inline never
• Enable PoE on a port
     • cnMatrix(config)#interface gigabitethernet0/1
     • cnMatrix(config-if)#power inline auto
• Display PoE per-port info
     • cnMatrix(config)#show power inline
• Display PoE global details
     • cnMatrix#showpower detail
• Display PoE per-port measurements info
     • cnMatrix#showpower inline measurements

3 Likes