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7 Flow 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.
Note:
The terms “collector”, “receiver” and “owner”, in the context of this chapter, all
refer to a remote server capable of receiving the sFlow datagrams generated by the
sFlow agent of the switch.
sflow owner This command creates an sFlow collector on the switch. Use the no form to remove
the sFlow receiver.
Syntax
sflow owner owner-name timeout timeout-value
[destination {ipv4-address | ipv6-address}] [port destination-udp-port]
[max-datagram-size max-datagram-size] [version {v4 | v5}]
no sflow owner owner-name
owner-name - Name of the collector. (Range: 1-30 alphanumeric characters)
timeout-value - The length of time the sFlow interface is available to send
samples to a receiver, after which the owner and associated polling and
Table 35: sFlow Commands
Command Function Mode
sflow owner Creates an sFlow collector which the switch uses to send
samples to.
PE
sflow polling instance Configures an sFlow polling data source that takes samples
periodically based on time.
PE
sflow sampling instance Configures an sFlow sampling data source that samples
periodically based on a packet count.
PE
show sflow Shows the global and interface settings for the sFlow
process
PE
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