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Chapter 1
Product Overview
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
SPAN and RSPAN
The Switched Port Analyzer (SPAN) feature is specific to switches in the Cisco MDS 9000 Family. It
monitors network traffic though 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.
The Remote SPAN (RSPAN) feature enables you to remotely monitor traffic for one or more SPAN
sources distributed in one or more source switches in a Fibre Channel fabric. The SPAN destination (SD)
port is used for remote monitoring in a destination switch. A destination switch may be different from
the source switch(es) provided that it is attached to the same Fibre Channel fabric. You can replicate and
monitor traffic in any remote Cisco MDS 9000 Family switch or director, just as you would monitor
traffic in an MDS source switch. This feature is nonintrusive and does not affect network traffic
switching for any SPAN source ports.
See
Switch Management Features
Besides the software features already listed, there are additional management features that fall into the
following categories: redundant supervisor module management, fabric management, and security
management.
Redundant Supervisor Module Management
The Cisco MDS 9500 Series of multilayer directors support two redundant supervisor modules. These
supervisor modules are required to provide high availability (see
Table 1-1
Supervisor Module Options in Cisco MDS 9000 Switches
Product
Cisco MDS 9100 Series
Cisco MDS 9200 Series
Cisco MDS 9506
Cisco MDS 9509
When a switch powers up and both supervisor modules are present, the module in slot 5 enters active
mode and the second module in slot 6 enters standby mode. All storage management functions occur on
the active supervisor module. The standby module constantly monitors the active module. If the active
module fails, the standby module takes over without any impact to user traffic.
Refer to the Cisco MDS 9500 Series Hardware Installation Guide.
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Chapter 43, "Monitoring Network Traffic Using SPAN."
No. of Supervisor Modules
Not applicable
One module (includes 16
additional ports)
Two modules
Two modules
Supervisor Module
Slot No.
Switching/Services Module Features
1
2-slot chassis allows one optional switching
or services module in the other slot.
5 and 6
6-slot chassis allows any switching or
services module in the other four slots.
5 and 6
9-slot chassis allows any switching or
services module in the other seven slots.
Cisco MDS 9000 Family Configuration Guide
Software Features
Table
1-1).
1-11
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