Users Guide

unied ports 1-24, but only profile-1, profile-2, and profile-3 activate 2x16GFC in port groups 1-6. In QSFP28 port groups,

profile-1 and profile-2 support 1x32GFC; profile-3 and profile-4 support 4x16GFC.

*profile-1 and profile-2 activate the same port mode capability on unied and Ethernet ports. The dierence is that in

profile-1, by default SFP+ unied ports 1-24 come up in Fibre Channel mode with 2x16GFC breakouts per port group. In profile-2,

by default SFP+ unied ports 1-24 come up in Ethernet 10GE mode.

profile-1 allows you to connect FC devices for plug-and-play;

profile-2 is designed for a standard Ethernet-based data network.

**Oversubscription: Congure oversubscription to support bursty storage trac on a Fibre Channel interface. Oversubscription allows a

port to operate faster, but may result in trac loss. To support oversubscription, use the speed command in Interface Conguration mode.

This command is not supported on an Ethernet interface. In S4148U-ON port proles:

• SFP+ and QSFP28 port groups in 4x8GFC mode support 16GFC oversubscription on member interfaces.

• QSFP28 ports in 2x16GFC mode support 32GFC oversubscription. SFP+ port groups in 2x16GFC mode do not support 32GFC

oversubscription. 2x16GFC mode activates subports 1 and 3.

• QSFP28 ports in 4x16GFC mode support 32GFC oversubscription.

Breakout interfaces:

• To congure breakout interfaces on a unied port, use the mode {FC | Eth} command in Port-Group Conguration mode. The

mode {FC | Eth} command congures a unied port to operate at line rate and guarantees no trac loss.

• To congure breakout interfaces on a QSFP+ Ethernet port, use the interface breakout command in global Conguration mode.

1GE mode: Only SFP+ ports support 1GE; QSFP+ and QSFP28 ports 25 to 30 do not support 1GE.

To view the ports that belong to each port group, use the show port-group command.

Unied port groups

In an OS10 unied port group, all ports operate in either Ethernet or Fibre Channel (FC) mode. You cannot mix modes for ports in the same

unied port group. To activate Ethernet interfaces, congure a port group to operate in Ethernet mode and specify the port speed. To

activate Fibre Channel interfaces, see Fibre Channel interfaces.

S4148U-ON

On the S4148U-ON switch, the available Ethernet and Fibre Channel interfaces in a port group depend on the currently congured port

prole. For more information, see S4148U-ON port proles.

Interfaces