Cisco Catalyst 3650 Series, Command Reference Manual

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ip flow monitor
To enable a Flexible NetFlow flow monitor for IPv4 traffic that the device is receiving or forwarding, use the
ip flow monitor command in interface configuration mode. To disable a flow monitor, use the no form of
this command.
ip flow monitor monitor-name
[
sampler sampler-name
] {
input| output
}
no ip flow monitor monitor-name [ sampler sampler-name ] { input| output }
Syntax Description
Name of the flow monitor to apply to the interface. monitor-name
(Optional) Enables the specified flow sampler for the flow monitor. sampler sampler-name
Monitors IPv4 traffic that the device receives on the interface. input
Monitors IPv4 traffic that the device transmits on the interface. output
Command Default
A flow monitor is not enabled.
Command Modes
Interface configuration
Command History
Modification Release
This command was introduced. Cisco IOS XE 3.3SE
Usage Guidelines
Before you can apply a flow monitor to an interface with the ip flow monitor command, you must have
already created the flow monitor using the flow monitor global configuration command.
When you add a sampler to a flow monitor, only packets that are selected by the named sampler will be entered
into the cache to form flows. Each use of a sampler causes separate statistics to be stored for that usage.
You cannot add a sampler to a flow monitor after the flow monitor has been enabled on the interface. You
must first remove the flow monitor from the interface and then enable the same flow monitor with a sampler.
The statistics for each flow must be scaled to give the expected true usage. For example, with a 1 in 100
sampler it is expected that the packet and byte counters will have to be multiplied by 100.
Note
Command Reference, Cisco IOS XE Everest 16.5.1a (Catalyst 3650 Switches)
433
ip flow monitor