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Configuring System Information 245
•
Transmit Error Rate (Errors/sec) —
Indicates the number of errors transmitted per second.
•
Total Errors —
Total number of errors transmitted.
•
Data Rate (Mb/s) —
Indicates the speed at which the data is received.
•
Receive Error Rate (Errors/sec) —
Indicates the number of errors received per second.
•
Total Errors —
Total number of errors received.
Viewing Stack Port Counters
1.
Open the
Stack Port Counters
page.
Viewing Stack Port Counters Using the CLI Command
For information about the CLI commands that perform this function, see the following chapter in the
CLI Reference Guide:
• System Management Commands
Stack Port Diagnostics
The Stack Port Diagnostics page is intended for Field Application Engineers (FAEs) and developers only.
sFlow
sFlow
®
is the standard for monitoring high-speed switched and routed networks. sFlow technology is
built into network equipment and gives complete visibility into network activity, enabling effective
management and control of network resources.
The sFlow monitoring system consists of an sFlow Agent (embedded in a switch or router or in a
standalone probe) and a central sFlow Collector. The sFlow Agent uses sampling technology to capture
traffic statistics from the device it is monitoring. sFlow datagrams are used to immediately forward the
sampled traffic statistics to an sFlow Collector for analysis.
The sFlow Agent uses two forms of sampling: statistical packet-based sampling of switched or routed
Packet Flows, and time-based sampling of counters.
Advantages of using sFlow include the following:
• It is possible to monitor all ports of the switch continuously with no impact on the distributed
switching performance.
• Very little memory/CPU is required. Samples are not aggregated into a flow-table on the switch; they
are forwarded immediately over the network to the sFlow collector.
• The system is tolerant to packet loss in the network (statistical model means loss is equivalent to slight
change in sampling rate).
• The sFlow collector can receive data from multiple switches, providing a real-time synchronized view
of the whole network.