Monitoring Network Traffic Using Span; About Span - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

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Monitoring Network Traffic Using SPAN

This chapter describes the Switched Port Analyzer (SPAN) features provided in switches in the Cisco
MDS 9000 Family. It includes the following sections:
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About SPAN

The SPAN feature is specific to switches in the Cisco MDS 9000 Family. It monitors network traffic
through a Fibre Channel interface. Traffic through any Fibre Channel interface can be replicated to a
special port called the SPAN destination port (SD port). Any Fibre Channel port in a switch can be
configured as an SD port. Once an interface is in SD port mode, it cannot be used for normal data traffic.
You can attach a Fibre Channel Analyzer to the SD port to monitor SPAN traffic (see
the Cisco Fabric Analyzer" section on page
SD ports do not receive frames, they only transmit a copy of the SPAN source traffic. The SPAN feature
is non-intrusive and does not affect switching of network traffic for any SPAN source ports (see
Figure
OL-17256-03, Cisco MDS NX-OS Release 4.x
About SPAN, page 60-1
SPAN Sources, page 60-2
SPAN Sessions, page 60-5
Specifying Filters, page 60-5
SD Port Characteristics, page 60-5
Configuring SPAN, page 60-6
Monitoring Traffic Using Fibre Channel Analyzers, page 60-10
Default SPAN Settings, page 60-13
60-1).
C H A P T E R
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Cisco MDS 9000 Family Fabric Manager Configuration Guide
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the"Configuring
60-1