SMC Networks 7724M/VSW - annexe 1, Manual

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CLI Management Guide
TigerAccess™ EE
230 SMC7824M/VSW
The sFlow Agent maintains linked-lists of Samplers, Pollers, and Receivers. Internally, the
agent extracts the interface data of the flow sample from sFlow device, creates new flow
sampling data. You can get more specific information of flow samples including in-
put/output interface of sampling ingress/egress packets, VLAN, priority, AS number and
so on.
sFlow sampler of agent is in charge of encoding the packet samples and sending them to
the receiver.
sFlow poller of the agent collects the sampling of network interface counters. The poller is
also in charge of encoding the interface counter data and sending them to the receiver.
Both flow and counter samples are combined in sFlow datagrams. And sFlow receiver
encodes those samples into UDP datagrams and sends the datagrams over the network
to the sFlow collector.
There are three parts of sFlow agent as shown below:
•
sFlow Agent
One agent can hold multiple samplers and pollers, but each sampler and poller points
to only one receiver.
– Sampler : This is used to collect packet samples for each interface.
– Poller : This is used to collect counter samples for each interface.
– Receiver : This is used to encode the flow and counter samples into UDP data-
grams.
sFlow implementation of the switch has the following restrictions, so you should keep in
mind those before configuring sFlow.
•
sFlow service must be enabled by service sflow command before enabling sFlow
function.
•
sFlow sampling of specified port would not be perfomed unless you enable sFlow
function for each port using sflow port PORTS enable command.
• sFlow sampling would not be performed when sample-rate or counter-interval or re-
ceiver index is 0.
7.16.1 sFlow Service
After you enable sFlow service using the following command, the sampling and polling of
sFlow interface just start to run in the system.
Enable or disable sFlow service globally, use the following command.
Command Mode Description
service sflow Enables sFlow service globally.
no service sflow
Global
Disables sFlow service globally.
7.16.2 Agent IP Address
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