User guide

Brocade 6910 Ethernet Access Switch Configuration Guide 135
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Chapter
8Flow Sampling Commands
Flow sampling (sFlow) can be used with a remote sFlow Collector to provide an accurate, detailed
and real-time overview of the types and levels of traffic present on the network. The sFlow Agent
samples 1 out of n packets from all data traversing the switch, re-encapsulates the samples as
sFlow datagrams and transmits them to the sFlow Collector. This sampling occurs at the internal
hardware level where all traffic is seen, whereas traditional probes only have a partial view of traffic
as it is sampled at the monitored interface. Moreover, the processor and memory load imposed by
the sFlow agent is minimal since local analysis does not take place.
sflow
This command enables sFlow globally for the switch. Use the no form to disable this feature.
Syntax
[no] sflow
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
Flow sampling must be enabled globally on the switch, as well as for those ports where it is
required (see the sflow source command).
TABLE 32 sFlow Commands
Command Function Mode
sflow Enables sFlow globally for the switch GC
sflow destination Configures the IP address and UDP port used by the Collector IC
sflow max-datagram-size Configures the maximum size of the sFlow datagram payload IC
sflow max-header-size Configures the maximum size of the sFlow datagram header IC
sflow owner Configures the name of the receiver IC
sflow polling-interval Configures the interval at which counters are added to the sample
datagram
IC
sflow sample Configures the packet sampling rate IC
sflow source Enables sFlow on the source ports to be monitored IC
sflow timeout Configures the length of time samples are sent to the Collector before
resetting all sFlow port parameters
IC
show sflow Shows the global and interface settings for the sFlow process PE