About Generations Of Modules And Switches - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

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
Configuring Generation 2 and Generation 3
Switching Modules
Cisco MDS 9000 Family hardware modules and switches are categorized into generations based on the
time of introduction, capabilities, features, and compatibilities:
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This chapter describes how to configure these modules and switches, including the following sections:
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About Generations of Modules and Switches

The Cisco MDS 9500 Series switches and Cisco MDS 9216A and Cisco MDS 9216i switches support a
set of modules called the Generation 2 modules. Each module or switch can have one or more ports in
port groups that share common resources such as bandwidth and buffer credits.
In addition to supporting Generation 2 modules, the Cisco MDS 9500 Series Switches and the Cisco
MDS 9222i Switch support another set of modules called Generation 3 modules. Similar to Generation
2, each Generation 3 module can have one or more ports in port groups that share common resources
such as bandwidth and buffer credits.
Generation 3 Fibre Channel modules are supported on the Cisco MDS 9506 and 9509 switches with
Supervisor-2 modules, and on the MDS 9513 Director with Fabric 2 modules. The MDS 9222i switch
supports the 4/44-port Host-Optimized Fibre Channel Switching module. MDS NX-OS Release 4.1(1)
is required to support the Generation 3 modules.
OL-18084-01, Cisco MDS NX-OS Release 4.x
Generation 1—Modules and switches with a maximum port speed of 2 Gbps.
Generation 2—Modules and switches with a maximum port speed of 4 Gbps.
Generation 3—Modules and switches with a maximum port speed of 8 Gbps.
About Generations of Modules and Switches, page 15-1
Port Groups and Port Rate Modes, page 15-3
Buffer Credit Allocation, page 15-8
Combining Generation 1, Generation 2, and Generation 3 Modules, page 15-22
Configuring Module Interface Shared Resources, page 15-28
Disabling ACL Adjacency Sharing for System Image Downgrade, page 15-50
Displaying SFP Diagnostic Information, page 15-50
Example Configurations, page 15-50
Default Settings, page 15-55
C H A P T E R
Cisco MDS 9000 Family CLI Configuration Guide
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15-1