Tuesday, June 23, 2009
Configuring switches through the switch command line interface (CLI) can be complex and time consuming, especially when monitoring needs to be configured on every switch in order to achieve network-wide visibility.
The sFlow MIB provides a way for an sFlow analysis application to use SNMP to automatically configure sFlow settings on the switches that it wants to monitor. Since the sFlow MIB is an optional part of the sFlow standard, not all sFlow capable switches can be configured using SNMP. However, HP ProCurve and Alcatel-Lucent switches support the sFlow MIB making it easy to quickly try out sFlow monitoring using the free sFlowTrend application. The screen capture above shows the sFlowTrend setting needed to enable SNMP configuration of sFlow.
Many traffic analyzers that claim sFlow support do not support the sFlow MIB. If you have switches that support the sFlow MIB, then selecting an analyzer that supports the sFlow MIB will ensure a successful deployment.
Future posts on this blog will describe the configuration commands needed to enable sFlow on additional vendor's switches.