3-18
Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
Chapter 3 Configuring Fibre Channel Interfaces
Guidelines and Limitations
When you are downgrading to a release earlier than Cisco SAN-OS Release 3.1(2), all modules keep
operating in the same bandwidth fairness configuration prior to the downgrade. After the downgrade,
any new module that is inserted has bandwidth fairness disabled.
Note After the downgrade, any insertion of a module or module reload will have bandwidth fairness disabled.
Guidelines and Limitations
This section includes the following topics:
• Combining Generation 1, Generation 2, Generation 3, and Generation 4 Modules, page 3-18
• Local Switching Limitations, page 3-19
• Port Index Limitations, page 3-19
• PortChannel Limitations, page 3-21
Combining Generation 1, Generation 2, Generation 3, and Generation 4 Modules
Cisco MDS NX-OS Release 5.2(x) and later supports combining Generation 1, Generation 2, Generation
3, and Generation 4 modules and switches with the following considerations:
• MDS NX-OS Release 4.1(1) and later features are not supported on the following Generation 1
switches and modules:
–
Supervisor 1 module
–
4-Port IP Storage Services module
–
8-Port IP Storage Services module
–
MDS 9216 switch
–
MDS 9216A switch
–
MDS 9020 switch
–
MDS 9120 switch
–
MDS 9140 switch
• Supervisor-1 modules must be upgraded to Supervisor-2 modules on the MDS 9506 and MDS 9509
Directors.
• IPS-4 and IPS-8 modules must be upgraded to the MSM-18/4 Multiservice modules.
• Fabric 1 modules must be upgraded to Fabric 2 modules on the MDS 9513 Director to use the
48-port or the 24-port 8-Gbps module.
• Fabric 2 modules must be upgraded to Fabric 3 modules on the MDS 9513 Director to get the
maximum backplane bandwidth of 256 Gbps.
• Cisco Fabric Manager Release 4.x supports MDS SAN-OS Release 3.x and NX-OS 4.x in mixed
mode through Interswitch Link (ISL) connectivity.
