Accton Technology ES4626 - Manual (Page 110)

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The sFlow (RFC 3176) is a protocol based on standard network export and used on
monitoring the network traffic information developed by the InMon Company.The
monitored switch or router sends date to the client analyzer through its main operations
such as sampling and statistic, then the analyzer will analyze acconrding to the user
requirements so to monitor the network.
A sFlow monitor system includes: sFlow proxy, central data collector and sFlow
analyzer. The sFlow proxy collects data from the switch using sampling technology. The
sFlow collector is for formatting the sample data statistic which is to be forwarded to the
sFlow analyzer which will analyze the sample data and perform corresponding measure
according to the result. Our switch here acts as the proxy and central data collector in the
sFlow system.
We have achieved data sampling and statistic targeting physical port.
Our data sample includes the IPv4 and IPv6 packets. Extensions of other types are
not supported so far. As for non IPv4 and IPv6 packet, the unify HEADER mode will be
adopted following the requirements in RFC3176, copying the head information of the
packet based on analyzing the type of its protocol.
The latest SFLOW protocol presented by Inmon company is the version 5. Since it is
the version 4 which is realized in the RFC3176, version conflict might exist in some case
such as the structure and the packet format. This is because the version 5 has not
become the official protocol, so, in order to be compatible with current applications, we
will continue to follow the RFC3176.
2.8.2 sFlow Configuration Task
1. Configure sFlow Collector address
Command Explanation
Global mode and interface mode
sflow destionation
[<collector-port>]
no sflow destionation
Configure the IP address and port number
of the host in which the sFlow analysis
software is installed. As for the ports, if IP
address is configured on the port, the port
configuration will be applied, or else will be
applied the global configuration. The “no
sflow destionation ” command restores to
the default port value and deletes the IP
address.
2. Configure the sFlow proxy address