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User Guidelines
Lower sampling numbers cause more samples to be collected and increase the
load on the CPU. Setting a sampling rate of 1024 on a large number of ports
may tax the CPU beyond it's ability to deliver the packets to the receiver.
Lowering the sampling rate (higher numerical value) will help to ensure that
all collected samples can be sent to the receiver. The sflow instance must be
configured using the sflow destination owner command before this
command can successfully execute.
Example
console(config)#sflow 1 sampling gigabitethernet 1/0/2 1500 50
sflow sampling (Interface Mode)
Use the sflow sampling command in Interface Mode to enable a new sflow
sampler instance for this data source if rcvr_idx is valid. Use the no form of
this command to reset sampler parameters to the default.
Syntax
sflow rcvr-index sampling sampling-rate [size]
no sflow rcvr-index sampling
•
rcvr-index — The sFlow Receiver for this sFlow sampler to which flow
samples are to be sent. If no receiver is configured, then no packets will
be sampled. Only active receivers can be set. If a receiver expires, then all
samplers associated with the receiver will also expire. (Range: 1 - 8).
•
sampling-rate — The statistical sampling rate for packet sampling from
this source. A sampling rate of 1 counts all packets. A rate of 0 disables
sampling. A value of n means that out of n incoming packets, 1 packet
will be sampled. (Range: 1024 - 65536).
•
size — The maximum number of bytes that should be copied from the
sampler packet (Range: 20 - 256 bytes).
Default Configuration
There are no samplers configured by default.
There is no default sampling rate.
The default maximum header size is 128.
Switch Management Commands
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