HP Cisco MDS 9120 Cisco MDS 9000 Family Fabric Manager Configuration Guide - R - Page 413

Chapter 20 Configuring Interfaces Fibre Channel Interfaces Send documentation comments to [email protected] When configuring these host-optimized ports, the following port mode guidelines apply: • You can configure only the first port in each 4-port group (for example, the first port in ports 1-4, the fifth port in ports 5-8 and so on) as an E port. If the first port in the group is configured as an E port, the other three ports in each group (ports 2-4, 6-8 and so on) are not usable and remain shutdown. • If you execute the write erase command on a 32-port switching module, and then copy a saved configuration to the switch from a text file that contains the no system default switchport shutdown command, you need to copy the text file to the switch again for the E ports to come up without manual configuration. • If any of the other three ports are enabled, you cannot configure the first port as an E port. The other three ports continue to remain enabled. • The auto mode is not allowed in a 32-port switching module or the host-optimized ports in the Cisco 9100 Series (16 host-optimized ports in the Cisco MDS 9120 switch and 32 host-optimized ports in the Cisco MDS 9140 switch). • The default port mode is Fx (Fx negotiates to F or FL) for 32-port switching modules. • The 32-port switching module does not support FICON. Note We recommend that you configure your E ports on a 16-port switching module. If you must configure an E port on a 32-port host-optimized switching module, the other three ports in that 4-port group cannot be used. Note In the Cisco MDS 9100 Series, the groups of ports that are located on the left and outlined in white are full line rate. The other ports are host-optimized. Each group of 4 host-optimized ports have the same features as for the 32-port switching module. About Interface Modes Each physical Fibre Channel interface in a switch may operate in one of several port modes: E port, F port, FL port, TL port, TE port, SD port, ST port, and B port (see Figure 20-2). Besides these modes, each interface may be configured in auto or Fx port modes. These two modes determine the port type during interface initialization. OL-17256-03, Cisco MDS NX-OS Release 4.x Cisco MDS 9000 Family Fabric Manager Configuration Guide 20-3