Span And Rspan; Switch Management Features; Redundant Supervisor Module Management - Cisco DS-C9216I-K9 Configuration Manual

Software Features
•

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 a MDS source switch. This feature is nonintrusive and does not affect network traffic switching
for any SPAN source ports.

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

Series of multilayer directors support two redundant supervisor modules. They require two supervisor
modules to enforce redundant supervisor module management and high availability and restartability.
Table 1-1
Product
Cisco MDS 9216
Cisco MDS 9506
Cisco MDS 9509
Cisco MDS 9120
Cisco MDS 8149
Cisco MDS 9000 Fabric Manager Switch Configuration Guide
1-8
Fibre Channel Congestion Control (FCC)--FCC is a flow control mechanism that alleviates
congestion on Fibre Channel networks. Any switch in the network can detect congestion for an
output port. The switches sample frames from the congested queue and generate messages about the
congestion level upstream toward the source of the congestion. The switch closest to the source, with
FCC enabled, can perform one of two actions:
Forwards the frames as other vendor switches do.
–
– Limits the flow of frames from the port causing the congestion.
Redundant Supervisor Module Management
No. of Supervisor
Modules
One module (includes
16 Fibre Channel
ports)
Two modules
Two modules
Not applicable
Not applicable
Slot Features
Slot 1 2-slot chassis allows one optional
switching module in the other slot.
Slots 5 and 6 6-slot chassis allows any switching
module in the other four slots.
Slots 5 and 6 9-slot chassis allows any switching
module in the other seven slots.
Chapter 1 Product Overview
OL-7753-01