• Identify sFlow collectors to which sFlow datagrams are forwarded.
CONFIGURATION mode
sflow collector ip-address agent-addr ip-address [number [max-datagram-size
number] ] | [max-datagram-size number ]
The default UDP port is 6343.
The default max-datagram-size is 1400.
Changing the Polling Intervals
The sflow polling-interval command configures the polling interval for an interface in the
maximum number of seconds between successive samples of counters sent to the collector.
This command changes the global default counter polling (20 seconds) interval. You can configure an
interface to use a different polling interval.
To configure the polling intervals globally (in CONFIGURATION mode) or by interface (in INTERFACE
mode), use the following command.
• Change the global default counter polling interval.
CONFIGURATION mode or INTERFACE mode
sflow polling-interval interval value
–interval value: in seconds.
The range is from 15 to 86400 seconds.
The default is 20 seconds.
Changing the Sampling Rate
The sflow sample-rate command, when issued in CONFIGURATION mode, changes the default
sampling rate.
By default, the sampling rate of an interface is set to the same value as the current global default
sampling rate. If the value entered is not a correct power of 2, the command generates an error message
with the previous and next power-of-2 value. Select one of these two numbers and re-enter the
command. (For more information on values in power-of-2, refer to Sub-Sampling.)
To change the sampling rate either globally or on an interface, use the following command.
• Change the global or interface sampling rate.
CONFIGURATION mode or INTERFACE mode
[no] sflow sample-rate sample-rate
sample-rate: The range is from 256 to 8388608 for the C-Series and S-Series. The range is from 2
to 8388608 for the E-Series.
The rate must be entered in factors of 2 (for example, 4096 or 8192).
sFlow 847