Dell PowerConnect B-FCXs, Configuration Manual

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PowerConnect B-Series FCX Configuration Guide 1431
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sFlow
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Specifying the collector
sFlow exports traffic statistics to an external collector. You can specify up to four collectors. You can
specify more than one collector with the same IP address if the UDP port numbers are unique. You
can have up to four unique combinations of IP addresses and UDP port numbers.
IPv4 devices
To specify an sFlow collector on an IPv4 device, enter a command such as the following.
PowerConnect(config)#sflow destination 10.10.10.1
This command specifies a collector with IPv4 address 10.10.10.1, listening for sFlow data on UDP
port 6343.
Syntax: [no] sflow destination <ip-addr> [ <dest-udp-port> ]
The <ip-addr> parameter specifies the IP address of the collector.
The <dest-udp-port> parameter specifies the UDP port on which the sFlow collector will be listening
for exported sFlow data. The default port number is 6343.
The sampled sFlow data sent to the collectors includes an agent_address field. This field identifies
the device that sent the data. Refer to
“Source address” on page 1429.
IPv6 devices
To specify an sFlow collector on an IPv6 device, enter a command such as the following.
PowerConnect(config)#sflow destination ipv6 2003:0:0::0b:02a
This command specifies a collector with IPv6 address 2003:0::0b:02a, listening for sFlow data on
UDP port 6343.
Syntax: [no] sflow destination ipv6 <ip-addr> [ <dest-udp-port> ]
The <ip-addr> parameter specifies the IP address of the collector.
The <dest-udp-port> parameter specifies the UDP port on which the sFlow collector will be listening
for exported sFlow data. The default port number is 6343.
If the IPv6 address you specify is a link-local address on a Layer 3 switch, you must also specify the
outgoing-interface ethernet
<port-num> or the ve <port-num> . This identifies the outgoing
interface through which the sampled packets will be sent.
The sampled sFlow data sent to the collectors includes an agent_address field. This field identifies
the device that sent the data. Refer to
“Source address” on page 1429.
Changing the polling interval
The polling interval defines how often sFlow byte and packet counter data for a port are sent to the
sFlow collectors. If multiple ports are enabled for sFlow, the Dell PowerConnect device staggers
transmission of the counter data to smooth performance. For example, if sFlow is enabled on two
ports and the polling interval is 20 seconds, the Dell PowerConnect device sends counter data
every ten seconds. The counter data for one of the ports are sent after ten seconds, and counter
data for the other port are sent after an additional ten seconds. Ten seconds later, new counter
data for the first port are sent. Similarly, if sFlow is enabled on five ports and the polling interval is
20 seconds, the Dell PowerConnect device sends counter data every four seconds.