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Command Reference Guide
ip flow cache sample one-out-of <number>
Use the ip flow cache sample one-out-of command to configure the integrated traffic monitoring (ITM)
cache sampling rate. The no form of this command disables sampling. Variations of this command include:
ip flow cache sample one-out-of <number> deterministic
ip flow cache sample one-out-of <number> random
Syntax Description
deterministic
random
<number>
Default Values
By default, sampling is disabled and every packet is recorded.
Command History
Release 16.1
Release 17.1
Functional Notes
Sampling provides a snapshot of traffic flow activity. It allows the cache to collect only one out of a
specified number of IP packets that the interface is receiving or sending. Often, network traffic arrives in
fixed patterns. This pattern can make statistics inaccurate if deterministic sampling is used. Therefore,
random sampling is recommended over deterministic sampling to ensure an accurate sampling of traffic
flow patterns. By reducing the amount of traffic flow data collected, sampling minimizes memory and CPU
usage.
For users of large routers (for example, the NetVanta 5305), a sampling rate of greater
than or equal to one out of every 100 packets is recommended.
Usage Examples
The following example configures ITM to sample one packet out of every 100 at a random sample rate:
(config)#ip flow cache sample one-out-of 100 random
60000CRG0-35E
Specifies that traffic flow sampling be done at a fixed rate.
Specifies that traffic flow sampling be done at a random rate.
Specifies the number of traffic flow packets to be observed before another
packet is sampled. Range is 1 to 255 packets.
Command was introduced.
Command was expanded to include the deterministic keyword.
Copyright © 2012 ADTRAN, Inc.
Global Configuration Mode Command Set
1020
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