Chapter 4 Monitoring
Check the Dashboard
4-12
User Guide for the Catalyst Express 500 Switches
OL-8122-01
PoE Gauge
The PoE Utilization gauge is only for switches with PoE ports.
The power gauge shows the total percentage of power that is allocated to
connected devices that are receiving power from the switch. Move the pointer
over the gauge to display the actual percentage of power (in watts) that is used and
is remaining. Each bar in the gauge represents 10 percent and does not show
increments that are less than 10 percent. The gauge does not show total PoE
utilization under 5 percent.
Data is collected at each 60-second system refresh. For a graph that shows power
utilization patterns over incremental instances in time (up to ten 60-second refresh
cycles), see the
“PoE Utilization Graph” section on page 4-16
.
The switch automatically maintains a power budget, monitors and tracks requests
for power, and grants power only when it is available. If the switch is powering
attached PoE devices, you should expect to see activity on this gauge.
Fan Status
The animated fan shows whether the fan (or blower) on the switch is rotating and
thus is functioning normally. If the fan is not rotating, check the physical switch.
A malfunctioning fan can affect the internal temperature of the switch. Check the
thermometer graphic to see if the switch has reached an unacceptably high
temperature.
Frame packets
Packets received because of a CRC error and a noninteger number of octets.
On a LAN, this is usually the result of collisions or a malfunctioning
Ethernet device.
Ignored packets
Packets that the interface ignores because the interface hardware is low on
internal buffers. These buffers are different than the system buffers.
Broadcast storms and bursts of noise can cause the ignored count to
increase.
Table 4-5
Types of Packet Errors (continued)
