HP Cisco Nexus 5000 Cisco MDS 9000 Family CLI Configuration Guide - Release 4. - Page 708

FICON Port Numbering Chapter 29 Configuring FICON Send documentation comments to [email protected] • FC ID Allocation, page 29-13 Note You must enable FICON on the switch before reserving FICON port number (see the "About Enabling FICON on a VSAN" section on page 29-14). 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 29-3). Figure 29-3 Default FICON Port Number in Numbering on the Cisco MDS 9000 Family Switch Module 1 16-Port module 0 1 2 3 4 5 6 7 8 9 10 11 11 13 14 15 Module 2 16-Port module 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 105217 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 port numbers. Note You can use the ficon slot assign port-numbers command to make use of any excess ports by assigning numbers to the slots. Before doing this, however, we recommend that you review the default port number assignments for Cisco MDS 9000 switches shown inTable 29-1, and that you read the following sections to gain a complete understanding of FICON port numbering: "About the Reserved FICON Port Numbering Scheme" section on page 29-10, "FICON Port Numbering Guidelines" section on page 29-11, and "Assigning FICON Port Numbers to Slots" section on page 29-11. 29-8 Cisco MDS 9000 Family CLI Configuration Guide OL-18084-01, Cisco MDS NX-OS Release 4.x