Chapter 4. Web Configuration & Operation
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CHAPTER 3
WEB OPERATION & CONFIGURATION
Receiver Configuration
Owner:
Basically, sFlow can be configured in two ways. One is through local management using the Web or CLI
interface or through SNMP. This read-only field shows the owner of the current sFlow configuration and assumes
values as follows:
• If sFlow is currently unconfigured/unclaimed, Owner contains <none>.
• If sFlow is currently configured through Web or CLI, Owner contains <Configured through local management>.
• If sFlow is currently configured through SNMP, Owner contains a string identifying the sFlow receiver. If sFlow is
configured through SNMP, all controls - except for the Release-button - are disabled to avoid inadvertent
reconfiguration.
The button allows for releasing the current owner and disable sFlow sampling. The button is disabled if sFlow is
currently unclaimed. If configured through SNMP, the release must be confirmed (a confirmation request will appear).
IP Address Hostname:
Specify the IP address or hostname of the sFlow receiver. Both IPv4 and IPv6 addresses are
supported.
UDP Port:
The UDP port on which the sFlow receiver listens to sFlow datagrams. If set to 0 (zero), the default port
(6343) is used.
Timeout:
The number of seconds remaining before sampling stops and the current sFlow owner is released. While
active, the current time left can be updated with a click on the Refresh-button. If locally managed, the timeout can be
changed on the fly without affecting any other settings. Valid range is 0 to 2147483647 seconds.
Max. Datagram Size:
The maximum number of data bytes that can be sent in a single sample datagram. This should be
set to a value that avoids fragmentation of the sFlow datagrams. Valid range is 200 to 1468 bytes with default being
1400 bytes.
Port Configuration
Port:
The port number for which the configuration below applies.
Flow Sampler Enabled:
Enables flow sampling on this port. Uncheck the box will disable flow sampling on the this
specific port.
Flow Sampler Sampling Rate:
The statistical sampling rate for packet sampling. Set to N to sample on average 1/Nth
of the packets transmitted/received on the port. Not all sampling rates are achievable. If an unsupported sampling
rate is requested, the switch will automatically adjust it to the closest achievable. This will be reported back in this
field. Valid range is 1 to 4294967295.
Flow Sampler Max. Header:
The maximum number of bytes that should be copied from a sampled packet to the
sFlow datagram. Valid range is 14 to 200 bytes with default being 128 bytes. If the maximum datagram size does not
take into account the maximum header size, samples may be dropped.
Counter Poller Enabled:
Enable counter polling on this port. Uncheck the box to disable Counter Poller function on
this port.
Counter Poller Interval:
With counter polling enabled, this specifies the interval - in seconds - between counter poller
samples. Valid range is 1 to 3600 seconds.
Save Button:
Click to save changes. Note that sFlow configuration is not persisted to non-volatile memory.
