shanehooton
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HP Procurve 3500 PoE Drops
We have a 4 month old HP Procurve 3500yl 48port PoE switch. For the past week, every morning around 9am the devices connected using PoE (our phones, WAPs, and cameras) will lose their power and then reboot normally. Sometimes they will do it once, others they will do it 2 or 3 times in a row and then they are fine the rest of the day.
I have updated the firmware to the latest release for the switch and this has not solved the problem. I also removed the WAPs from the switch because they were drawing the most power. The total power being used is about one third of what is available for the switch.
The logs on the switch show no errors or PoE alarms. The only thing that does come up is the "loss of Link" message for the devices that lose power and in turn, network access.
Does anyone have any idea what may be a cause of this issue?
I have updated the firmware to the latest release for the switch and this has not solved the problem. I also removed the WAPs from the switch because they were drawing the most power. The total power being used is about one third of what is available for the switch.
The logs on the switch show no errors or PoE alarms. The only thing that does come up is the "loss of Link" message for the devices that lose power and in turn, network access.
Does anyone have any idea what may be a cause of this issue?
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Switches / Hubs
A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.
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All of the PoE was set with usage. I moved several to class to see if that alleviates the problem. I notice when I put them in class it shows the voltage as 7.74. That is what is allocated correct?
I have found online where issues can be caused when phones come out of power save mode first thing in the morning and the power allocation goes crazy causing reboots. I'm thinking that if I put the mode to Class that should permanently have the power allocated correct?