> # Default FICON Port Numbering Scheme

> Default FICON port numbers are assigned by the Cisco MDS NX-OS software based on the module and the slot in the chassis. The first port in a switch always starts with a zero (0).

> Figure 25-1 Default FICON Port Number in Numbering on the Cisco MDS 9000 Family Switch

> The default FICON port number is assigned based on the front panel location of the port and is specific to the slot in which the module resides. Thirty-two (32) port numbers are assigned to each slot on all Cisco MDS 9000 Family switches except for the Cisco MDS 9513 Director, which has 16 port numbers assigned for each slot. These default numbers are assigned regardless of the module’s physical presence in the chassis, the port status (up or down), or the number of ports on the module (4, 12, 16, 24, or 48). If a module has fewer ports than the number of port numbers assigned to the slot, then the excess port numbers are unused. If a module has more ports than the number of port numbers assigned to the slot, the excess ports cannot be used for FICON traffic unless you manually assign the port numbers.

> Note Follow the steps in "Assigning FICON Port Numbers to Slots" topic to make use of excess ports by manually assigning more port numbers to the slots. Before doing this, however, we recommend that you review the default port number assignments for Cisco MDS 9000 switches shown in Table 25-3 Table 25-1, and that you read the following sections to gain a complete understanding of FICON port numbering: "About the Reserved FICON Port Numbering Scheme" topic, "FICON Port Numbering Guidelines" topic, and "Assigning FICON Port Numbers to Slots" topic.

> Note Only Fibre Channel, PortChannel, and FCIP ports are mapped to FICON port numbers. Other types of interfaces do not have a corresponding port number.

> Table 25-1 lists the default port number assignment for the Cisco MDS 9000 Family of switches and directors.

> Table 25-1 Default FICON Port Numbering in the Cisco MDS 9000 Family
> Product | Slot Number | Implemented Port Allocation | Unimplemented Ports | Notes
> --- | --- | --- | --- | ---
> To Ports | To PortChannel/FCIP
> Cisco MDS 9200 Series | Slot 1 | 0 through 31 | 64 through 89 | 90 through 253 and port 255 | Similar to a switching module.
> Slot 2 | 32 through 63
> Cisco MDS 9222i Series | Slot 1 | 0 through 31 | 64 through 89 | 90 through 253 and port 255 | The first 4, 12, 16, or 24 port numbers in a 4-port, 12-port, 16-port, or 24-port module are used and the rest remain unused. Extra 16 ports on 48-port modules are not allocated numbers.
> Slot 2 | 32 through 63
> Cisco MDS 9506 Director | Slot 1 | 0 through 31 | 128 through 153 | 154 through 253 and port 255 | Supervisor modules are not allocated port numbers.
> Slot 2 | 32 through 63
> Slot 3 | 64 through 95
> Slot 4 | 96 through 127
> Slot 5 | None
> Slot 6 | None
> Cisco MDS 9134 Director | Slot 1 | 0 through 33 | 34 through 59 | 60 through 253 and port 255
> Cisco MDS 9509 Director | Slot 1 | 0 through 31 | 224 through 249 | 250 through 253 and port 255 | The first 4, 12, 16, or 24 port numbers in a 4-port, 12-port, 16-port, or 24-port module are used and the rest remain unused. Extra 16 ports on 48-port modules are not allocated port numbers.
> Slot 2 | 32 through 63
> Slot 3 | 64 through 95
> Slot 4 | 96 through 127
> Slot 5 | None | Supervisor modules are not allocated port numbers.
> Slot 6 | None
> Slot 7 | 128 through 159 | The first 4, 12, 16, or 24 port numbers are used for a 4-port, 12-port,16-port, or 24-port module and the rest remain unused. Extra 16 ports on 48-port modules are not allocated port numbers.
> Slot 8 | 160 through 191
> Slot 9 | 192 through 223
> Cisco MDS 9513 Director | Slot 1 | 0 through 15 | 224 through 249 | 250 through 253 and port 255 | The first 4, 12 or 16 port numbers are used for a 4-port, 12-port or 16-port module and the rest remain unused. Extra ports on 24-port, 32-port, and 48-port modules are not allocated port numbers.
> Slot 2 | 16 through 31
> Slot 3 | 32 through 47
> Slot 4 | 48 through 63
> Slot 5 | 64 through 79
> Slot 6 | 80 through 95
> Slot 7 | None | Supervisor modules are not allocated port numbers.
> Slot 8 | None
> Slot 9 | 96 through 111 | The first 4 or 12 port numbers are used for a 4-port or 12-port module and the rest remain unused. Extra ports on 24-port, 32-port, and 48-port modules are not allocated port numbers.
> Slot 10 | 112 through 127
> Slot 11 | 128 through 143
> Slot 12 | 144 through 159
> Slot 13 | 160 through 175

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