1430 PowerConnect B-Series FCX Configuration Guide
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sFlow
A
If an IP address is not already configured when you enable sFlow, the feature uses the source
address 0.0.0.0. To display the agent_address, enable sFlow, then enter the show sflow command.
Refer to “Enabling sFlow forwarding” on page 1435 and “Displaying sFlow information” on
page 1439.
In sFlow version 5, you can set an arbitrary IPv4 or IPv6 address as the sFlow agent IP address. Refer
to “Specifying the sFlow agent IP address” on page 1437.
Sampling rate
The sampling rate is the average ratio of the number of packets incoming on an sFlow enabled
port, to the number of flow samples taken from those packets. sFlow sampling can affect
performance in some configurations.
Note that on the PowerConnect devices, the configured sampling rate and the actual rate are the
same. The software does not adjust the configured sampling rate.
Port monitoring and sFlow
• PowerConnect B-Series FCX devices support sFlow and port monitoring together on the same
port.
Configuring and enabling sFlow
The commands in this section apply to sFlow version 2 and sFlow version 5. CLI commands that are
specific to sFlow version 5 are documented in “Configuring sFlow version 5 features” on page 1436.
To configure sFlow,perform the following tasks:
• Optional – If your device supports sFlow version 5, change the version used for exporting sFlow
data
• Specify collector information. The collector is the external device to which you are exporting the
sFlow data. You can specify up to four collectors.
• Optional – Change the polling interval
• Optional – Change the sampling rate
• Enable sFlow globally
• Enable sFlow forwarding on individual interfaces
• Enable sFlow forwarding on individual trunk ports
• If your device supports sFlow version 5, configure sFlow version 5 features
If you change the router ID or other IP address value that sFlow uses for its agent_address, you need
to disable and then re-enable sFlow to cause the feature to use the new source address.
