Netflow-Lite Monitor - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

netflow-lite monitor

NetFlow-lite is only supported on the Catalyst 4948E and Catalyst 4948E-F Ethernet switches.
Note
To define a monitor instance on an interface and to enter netflow-lite monitor submode, use the
netflow-lite monitor command. To delete the monitor, use the no form of this command.
Syntax Description
sampler-name
Defaults None
Command Modes global configuration mode
Command History Release
15.0(2)SG
Usage Guidelines Only a single packet sampling instance is supported on a data source. These commands are entered under
the physical port interface mode, port channel interface, or config VLAN mode. Monitor is not supported
on other interfaces. If the physical port is a member of a port channel, applying the monitor to the port
has no effect. You must apply the monitor to the port channel instead.
VLAN sampling is not supported in Cisco IOS Release 15.0(2)SG. It will be supported in a later release.
Note
Mandatory parameters are sampler and exporter. If no exporter is associated with a monitor, no samples
are exported. If so, no input packet sampling occurs for that target interface. A warning message displays
indicating that the sampler or exporter is invalid if any mandatory parameters are missing.
The packet sampling mechanism tries to achieve random 1-in-N sampling. Internally 2 levels of
sampling are done. The accuracy of the first level of sampling depends on the size of the packets arriving
at a given interface. To tune the relative accuracy of the algorithm the average-packet-size parameter
can be used.
The system automatically determines the average packet size at an interface based on observation of
input traffic and uses that value in its first level of sampling.
Valid range of packet sizes that can be used by the algorithm is 64 - 9216 bytes. Any number below 64
bytes is taken to mean that automatic determination of average packet size is desired.
OL-27596 -01
netflow-lite monitor sampler-name
no netflow-lite sampler sampler-name
Specifies a sample.
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
netflow-lite monitor
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