Cisco AJ732A - MDS 9134 Fabric Switch Installation Manual page 51

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 .
means that while there may be enough port indexes available for a Generation 1 module, the module may
not boot up because the available port indexes are not in a contiguous range or the contiguous block does
not start at the first port index for a given slot.
Example 1-1
borrowed port indexes from the first slot. Slot 1 still has 16 port indexes available, but the full 32 indexes
are no longer available (28-31 are used by the module in slot 4). This means that no Generation 1 module
except a 16-port Fibre Channel switching module can be inserted into slot 1 because some of the port
indexes for the slot are already in use.
Example 1-1
switch# show port index-allocation
Module index distribution:
---------------------------------------------------+
Slot
-------|---------|-------|-------------------------|
1
2
3
4
7
8
9
SU
*Allowed range applicable only for Generation-1 modules
Using any combination of modules that include a Generation 1 module and a Supervisor-2 module
limits the port index availability to 252 on all Cisco MDS 9500 Series Directors. The Generation 1
modules can use any contiguous block of port indexes that start on the first port index reserved for any
slot in the range 0-252. (See
Using any combination of only Generation 2 with a Supervisor-2 module allows a maximum of 528 (with
an architectural limit of 1020) port indexes on all Cisco MDS 9500 Series Directors. Generation 2
modules do not need contiguous port indexes. Generation 2 modules use the available indexes in the slot
that it is installed and then borrow available indexes from the supervisors. If the module requires more
indexes, it starts borrowing available indexes from slot 1 of the chassis until it has the number of port
indexes necessary.
Enter the purge module CLI command to free up reserved port indexes after you remove a module.
Note
OL-17467-02
shows a scenario with a Supervisor-1 module, where a 48-port Generation 2 module
Borrowing Port Indexes from Another Slot
| Allowed | Alloted indices info
| range* | Total |
| 0- 31| - | -
| 32- 63| 32 | 32-63
| 64- 95| 48 | 64-95,224-239
| 96- 127| 48 | 96-127, 240-252, 28-31 |
| 128- 159| 32 | 128-159
| 160- 191| 32 | 160-191
| 192- 223| 32 | 192-223
| 253-255 | 3 | 253-255
Table
|
Index values |
|
|
|
|
|
|
|
1-9.)
Cisco MDS 9500 Series Hardware Installation Guide
Port Index Availability
1-29