In some cases, it may be appropriate to disconnect the Ethernet cables from all but one switch port, and leave a powered device connected to only that PoE port. Use the show power inline privileged EXEC command to verify that the powered device receives power when the port is not shut down. Step 6 Enter the shut and no shut interface configuration commands on this port.
Use only a short patch cord to make the connection. Do not use the existing distribution cables.
Step 5 If there are no alarms reported by LEDs, CLI messages, or in the output of the show env all privileged EXEC command, connect a powered device directly to a switch port. Step 4 If there is a persistent alarm related to power, replace the power supply if it is field-replaceable. If the trouble is on a consecutive group of ports but not all ports, there could be a defective PoE subsection in the switch. Step 3 If the trouble is on all ports, the PoE section of the power supply might be defective if the switch works normally except for PoE and if non-PoE devices can establish an Ethernet link on any port. Use the show log privileged EXEC command to review alarms reported earlier by system messages. Step 2 Use the show env all, show interface status, and show power inline privileged EXEC commands to review power status if no powered device on any port can power on. Step 1 Use the show interface status privileged EXEC command to verify that the ports are not shut down and not error disabled. Confirm that nonpowered Ethernet devices can establish an Ethernet link on any port and that PoE devices do not power on. Verify that switch power budget can power the device.įollow these steps when there is no power on any port or a consecutive group of ports. Step 8 Use the show power inline and show power inline detail privileged EXEC commands to compare the number of connected powered devices against the switch power budget (available PoE). Next, connect a powered device to this port, and verify that it powers on. Verify that the device establishes an Ethernet link and exchanges traffic with another host, or ping the port VLAN SVI. Use a short Ethernet cable to connect a known good Ethernet device to this switch port (not at a patch panel). Step 7 Disconnect the Ethernet cable from the switch port.
#Powered earthnet repeater patch panels software
For more information, see the cable diagnostics section in the switch software configuration guide. Step 6 Verify that the total cable length from the switch front panel to the connected device (powered device) is not more than 100 meters. Connect a known good non-PoE Ethernet device to the Ethernet cable, and make sure that it establishes a link and exchanges traffic with another host. Step 5 Verify that the Ethernet cable from the phone to the switch port is good. Step 4 Use the show run and show power inline interface-id privileged EXEC command to verify that the power inline never interface configuration command is not configured on the port. Step 3 Use the show interface status privileged EXEC command to verify that the switch port is not error disabled. (Most Cisco switches turn off port power when the port shuts down.) Step 2 Use the show run and show interface status privileged EXEC commands to verify that the port is not shut down. Step 1 Verify that the powered device works on other ports and that the problem is only on one port. Confirm that PoE and Non-PoE devices do not work on this port but work on other ports. For example, if the technical information of a PoE network camera specify 18 watts maximum power consumption, calculate with 20 watts to be on the safe side.Follow these steps when the trouble is on only one switch port. Tip: Be conservative and leave enough room for error. Typically this information can be obtained from the technical specifications of the device, but sometimes you may need to contact the manufacturer. Type of PoE (PD) device: The maximum power consumption of the PoE device you wish to connect is a crucial factor.Special attention should be paid the the technical specification of the PoE repeater. Type of PoE extender (2): First, not all PoE repeaters can be daisy-chained, and second, the amount of power the extender draws varies.The higher the input power, the further you can extend the signal by means of cascading more PoE repeaters. Type of PoE extender (1): Ultra PoE Extenders can take from 60 to 90 watts of power and whereas High-Power PoE+ Extenders are typically limited to an input of 30 watts.Exactly how far you can extend the PoE connection depends on various factors.
0 kommentar(er)
