Switch health – Rockwell Automation 1783-BMxxx Stratix 5700 Ethernet Managed Switches User Manual User Manual
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Rockwell Automation Publication 1783-UM004E-EN-P - June 2014
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Manage the Switch via the Device Manager Web Interface Chapter 4
Switch Health
You can use the health gauges to monitor the switch.
CPU Utilization
The CPU Utilization gauge shows the percentage of CPU processing power that
is in use on the switch. Data is collected at each 60-second system refresh. The
gauge changes as the switch experiences the network activity from devices
sending data through the network. As network activity increases, so does
contention between devices to send data through the network.
As you monitor utilization on the switch, note whether the percentage of usage is
what you expect during that given time of network activity. If utilization is high
when you expect it to be low, perhaps a problem exists. As you monitor the
switch, note if the bandwidth utilization is consistently high. This can mean there
is congestion in the network. If the switch reaches its maximum bandwidth
(above 90% utilization) and its buffers become full, it begins to discard the data
packets that it receives. Some packet loss in the network is not considered
unusual, and the switch is configured to help recover lost packets, such as by
signaling to other devices to resend data. However, excessive packet loss can create
packet errors, which can degrade overall network performance.
To reduce congestion, consider segmenting the network into subnetworks that
are connected by other switches or routers. Look for other causes, such as faulty
devices or connections, that can also increase bandwidth utilization on the
switch.
Temperature
The Temperature gauge shows the internal temperature of the switch. For
information about the switch temperature range and the operating environment
guidelines, see the Stratix Ethernet Device Specifications Technical Data,
publicati
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