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) (see Figure 56: Default FICON Port
Number in Numbering on the Cisco MDS 9000 Family Switch, on page 252).
Figure 56: 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.
You can use the ficon slot assign port-numbers command to make use of any Follow the steps in Assigning
FICON Port Numbers to Slots, on page 256 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 24: Default FICON Settings , on page 298 Table
22: Default FICON Port Numbering in the Cisco MDS 9000 Family , on page 253, and that you read the
following sections to gain a complete understanding of FICON port numbering: About the Reserved FICON
Port Numbering Scheme, on page 255, FICON Port Numbering Guidelines, on page 256, and Assigning FICON
Port Numbers to Slots, on page 256.
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.
Note
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
252
Configuring FICON
Default FICON Port Numbering Scheme
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