Brocade Communications Systems 6650 manual SFlow version

11 sFlow

The event control table defines the action to be taken when an alarm is reported. Defined events can be found by entering the CLI command, show event. The Event Log Table collects and stores reported events for retrieval by an RMON application.

A sample entry and syntax of the event control table is shown below.

Brocade(config)#rmon event 1 description ‘testing a longer string’ log-and-trap public owner nyc02

Syntax: rmon event <event-entry>description <text-string>log trap log-and-trap owner <rmon-station>

sFlow

NOTE

Brocade ICX 6650 devices support sFlow version 5 by default.

sFlow is a standards-based protocol that allows network traffic to be sampled at a user-defined rate for the purpose of monitoring traffic flow patterns and identifying packet transfer rates on user-specified interfaces.

When sFlow is enabled on a Layer 2 or Layer 3 switch, the system performs the following sFlow-related tasks:

•Samples traffic flows by copying packet header information

•Identifies ingress and egress interfaces for the sampled flows

•Combines sFlow samples into UDP packets and forwards them to the sFlow collectors for analysis

•Forwards byte and packet count data, or counter samples, to sFlow collectors

sFlow is described in RFC 3176, “InMon Corporation's sFlow: A Method for Monitoring Traffic in Switched and Routed Networks”.

NOTE

You can use QoS queue 1 for priority traffic, even when sFlow is enabled on the port. QoS queue 1 is reserved for sFlow and is not used by other packets. Any non-sFlow packets assigned to QoS queue 1 will be directed to QoS queue 0.

sFlow version 5

sFlow version 5 enhances and modifies the format of the data sent to the sFlow collector. sFlow version 5 introduces several new sFlow features and also defines a new datagram syntax used by the sFlow agent to report flow samples and interface counters to the sFlow collector.

sFlow version 5 adds support for the following:

•sFlow version 5 datagrams

•Sub-agent support

•Configurable sFlow export packet size

•Support for the new data field and sample type length in flow samples

•Configurable interval for exporting Brocade-specific data structure

254	Brocade ICX 6650 Administration Guide
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