Cisco Systems 6500, EA6500 Default NDE Configuration

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Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
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Chapter 33 Configuring NDE
Default NDE Configuration
You can configure sampled NetFlow to use time-based sampling or packet-based sampling.
Table 33-5 lists the time-based sampling rates and export intervals.
As examples, if you configure 64 as the rate, then every 4096 milliseconds the sampled NetFlow feature
uses traffic from the first 64 milliseconds of a flow; if the rate is 2048, then every 8192 milliseconds, the
sampled NetFlow feature uses traffic from the first 4 milliseconds of a flow. With time-based sampled
NetFlow, the export interval is not configurable.
Packet-based sampled NetFlow uses this formula to sample a flow: the numer of times sampled is
approximately the length divided by the rate (packets_in_flow/sampling_rate). For example, if the flow
is 32,768 packets long and the sampling rate is 1024, the flow is sampled approximately 32 times
(32,768/1,024). With packet-based sampled NetFlow, the export interval is configurable.
Default NDE Configuration
Table 33-6 shows the default NDE configuration.
Table 33-5 Time-Based Sampling Rates, Sampling Times, and Export Intervals
Sampling Rate Sampling Time (Milliseconds) Export Interval (Milliseconds)
1 in 64 64 4096
1 in 128 32 4096
1 in 256 16 4096
1 in 512 8 4096
1 in 1024 4 4096
1 in 2048 4 8192
1 in 4096 4 16384
1 in 8192 4 32768
Table 33-6 Default NetFlow Data Export Configuration
Feature Default Value
NDE Disabled
NDE source addresses None
NDE data collector address and UDP port None
NDE filters None
Sampled NetFlow Disabled
Populating additional NDE fields Disabled