What is sampling rate in sFlow?
The sampling rate is the average ratio of the number of packets incoming on an sFlow-enabled port to the number of flow samples taken from those packets. sFlow sampling can affect performance in some configurations. Note that on the RUCKUS ICX devices, the configured sampling rate and the actual rate are the same.
What is sFlow protocol?
sFlow, short for “sampled flow”, is an industry standard for packet export at Layer 2 of the OSI model. It provides a means for exporting truncated packets, together with interface counters for the purpose of network monitoring.
What is sFlow polling interval?
The sflow polling-interval command specifies the counters polling interval. The switch uses this interval to schedule a ports counter data transmissions to the sFlow collector. The default interval is two seconds.
What is a sampling rate in networking?
Typically expressed in samples per second, or hertz (Hz), the rate at which samples of an analog signal are taken in order to be converted into digital form. …
What port does sFlow use?
UDP port 6343
By default, sFlow uses UDP port 6343 (this can be changed if required – see Section 13.2.
What is difference between NetFlow and sFlow?
Here are some key differences between NetFlow and sFlow: NetFlow does not forward packet samples directly to collectors but instead exports “flow records” to collectors that are created by tracking a collection of packets associated with a session. sFlow packet sampling consists of randomly sampling individual packets.
What is included in NetFlow data?
NetFlow is a network protocol system created by Cisco that collects active IP network traffic as it flows in or out of an interface. The NetFlow data is then analyzed to create a picture of network traffic flow and volume — hence the name: NetFlow.
How do I configure sFlow to monitor link utilizations?
Configure sFlow monitoring on all interfaces on the switch for full visibility. Packet sampling is implemented in hardware so all the interfaces can be monitored with very little overhead. Finally, select a suitable counter polling interval so that link utilizations can be accurately tracked.
How long should I set the polling interval for sFlow?
For example, to trend utilization with minute granularity, select a polling interval of between 20 and 30 seconds. Don’t be concerned about setting relatively short polling intervals; counter polling with sFlow is very efficient, allowing more frequent polling with less overhead than is possible with SNMP.
What is the best practice for interface monitoring in packet sampling?
Packet sampling is implemented in hardware so all the interfaces can be monitored with very little overhead. Finally, select a suitable counter polling interval so that link utilizations can be accurately tracked.
What is the recommended sampling rate for network traffic monitoring?
The table gives suggested values that should work well for general traffic monitoring in most networks. However, if traffic levels are unusually high the sampling rate may be decreased (e.g. use 1 in 5000 instead of 1 in 2000 for 10Gb/s links).