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5-5
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 5 Troubleshooting Mixed Generation Hardware
Overview
Using any combination of modules that include a Generation 1 module or a Supervisor-1 module limits
the port index availability to 252 on all Cisco MDS 9500 Series directors. Generation 1 modules also
require contiguous port indexes where the system assigns a block of port index numbers contiguously
starting from the first port index reserved for the slot that the module is inserted in (See Table 5-7). This
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 5-1 shows a case with a Supervisor-1 module, where a 48-port Generation 2 module 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 5-1 Borrowing Port Indexes from Another Slot
switch#show port index-allocation
Module index distribution:
---------------------------------------------------+
Slot | Allowed | Alloted indices info |
| range* | Total | Index values |
-------|---------|-------|-------------------------|
1 | 0- 31| - | - |
2 | 32- 63| 32 | 32-63 |
3 | 64- 95| 48 | 64-95,224-239 |
4 | 96- 127| 48 | 96-127, 240-252, 28-31 |
7 | 128- 159| 32 | 128-159 |
8 | 160- 191| 32 | 160-191 |
9 | 192- 223| 32 | 192-223 |
SU | 253-255 | 3 | 253-255 |
*Allowed range applicable only for Generation-1 modules
12-port 4-Gbps Fibre Channel switching module 12 12
4-port 10-Gbps Fibre Channel switching module 4 4
16-port 2-Gbps Fibre Channel module 16 16
1
32-port 2-Gbps Fibre Channel module 32 32
1
8-port Gigabit Ethernet IP Storage services module 8 32
1
4-port Gigabit Ethernet IP Storage services module 4 32 (with Supervisor-1)
16 (with Supervisor-2)
32-port 2-Gbps Fibre Channel Storage Services Module
(SSM).
32 32
1
14-port Fibre Channel/2-port Gigabit Ethernet
Multiprotocol Services (MPS-14/2) module
16
2
32 (with Supervisor-1)
22 (with Supervisor-2)
1. All Generation 1 modules reserve port indexes on fixed boundaries with Supervisor-1. See Table 5-7.
2. Fourteen Fibre Channel ports and two Gigabit Ethernet ports.
Table 5-6 Port Index Allocation (continued)
Module Physical Ports Port Indexes Allocated
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