Wireless/Redundant Edge Services xl Module Management and Configuration Guide WS.02.xx and greater

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sFlow Agent
Configuring sFlow Using the Web Browser Interface
Of course, the activity on a radio changes over time, so there are no
absolute rules for determining the best sampling rate.
6. Optionally, alter the value in the Maximum Header Size field to set the
amount of data (in bytes) included in a sample.
The module samples the specified number of bytes. For example, if you
set the Maximum Header Size to 100, the module places the first 100 bytes
of every sampled frame in a datagram. The value should match the size of
the frame and packet header so that the entire header is forwarded. The
valid range is from 100 to 128 bytes, and the default is 128.
7. Click the OK button.
8. Click the Save link to copy the configuration to the startup-config.
Manually Activating Counter Polling
In addition to sampling specific packets, an sFlow agent can gather statistics
about overall traffic flow, including:
■ the number of inbound packets
■ the number of outbound packets
■ the number of retransmission attempts
■ the number of transmission failures
■ the number of packet errors
The agent periodically polls its data sources for these statistics; for the
Wireless Edge Services xl Module, the data sources are its RP radios.
The module maintains six separate counter polling (sFlow) instances for each
radio. You can view the three configurable from the Web browser interface in
the Special Features > sFlow > Counter Polling screen.