About Combining Generation 1 And Generation 2 Switching Modules; Port Indexes - HP Cisco MDS 9020 - Fabric Switch Configuration Manual

About Combining Generation 1 and Generation 2 Switching Modules

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
for how many extended BB_credits you can assign to a port (except for the maximum and minimum
limits). If necessary, you can take interfaces out of service to make more extended BB_credits available
to other ports.
About Combining Generation 1 and Generation 2 Switching
Modules
You can combine Generation 1 and Generation 2 switching modules, with either Supervisor-1 modules
or Supervisor-2 modules. However, combining switching modules and supervisor modules has the
following port index limitations:
•
•
•

Port Indexes

Cisco MDS 9000 switches allocate index identifiers for the ports on the modules. These port indexes
cannot be configured. You can combine Generation 1 and Generation 2 switching modules, with either
Supervisor-1 modules or Supervisor-2 modules. However, combining switching modules and supervisor
modules has the following port index limitations:
•
•
•
Note On a switch with the maximum limit of 252 port index maximum limit, any new module that exceeds the
limit when installed does not power up.
You can use the show port index-allocation command to display the allocation of port indexes on the
switch.
switch# show port index-allocation
Module index distribution:
------------------------------------------------------+
Slot | Allowed |
-----|---------|-------|------------------------------|
1
2
Cisco MDS 9000 Family CLI Configuration Guide
14-16
Supervisor-1 modules only support a maximum of 252 port indexes, regardless of the type of
switching modules.
Supervisor-2 modules support a maximum of 1020 port indexes when all switching modules in the
chassis are Generation 2.
Supervisor-2 modules only support a maximum of 252 port indexes when only Generation 1
switching modules, or a combination of Generation 1 and Generation 2 switching modules, are
installed in the chassis.
Supervisor-1 modules only support a maximum of 252 port indexes, regardless of the type of
switching modules.
Supervisor-2 modules support a maximum of 1020 port indexes when all switching modules in the
chassis are Generation 2.
Supervisor-2 modules only support a maximum of 252 port indexes when only Generation 1
switching modules, or a combination of Generation 1 and Generation 2 switching modules, are
installed in the chassis.
Alloted indices info
| range | Total |
| 0- 255| 16 | 32-47
| 0- 255| 12 | 0-11
Chapter 14 Configuring Generation 2 Switches and Modules
|
Index values |
|
|
OL-16184-01, Cisco MDS SAN-OS Release 3.x