Configuration Guide User guide

FastIron Configuration Guide 535
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sFlow
An alarm event is reported each time that a threshold is exceeded. The alarm entry also indicates
the action (event) to be taken if the threshold be exceeded.
A sample CLI alarm entry and its syntax is shown below.
Brocade(config)#rmon alarm 1 ifInOctets.6 10 delta rising-threshold 100 1 falling
threshold 50 1 owner nyc02
Syntax: rmon alarm <entry-number> <MIB-object.interface-num> <sampling-time>
<sample-type>
<threshold-type> <threshold-value> <event-number> <threshold-type> <threshold-value>
<event-number>
owner <text-string>
Event (RMON group 9)
There are two elements to the Event Group—the event control table and the event log table.
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
FastIron 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”.