Reference Guide
*profile-1 and profile-2 activate the same port mode capability on unied and Ethernet ports. The dierence is that in
profile-1, by default SFP+ unied ports 1-24 come up in Fibre Channel mode with 2x16GFC breakouts per port group. In profile-2,
by default SFP+ unied 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: Congure oversubscription to support bursty storage trac on a Fibre Channel interface. Oversubscription allows a
port to operate faster, but may result in trac loss. To support oversubscription, use the speed command in Interface conguration mode.
This command is not supported on an Ethernet interface. In S4148U-ON port proles:
• 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 congure breakout interfaces on a unied port, use the mode {FC | Eth} command in Port-Group conguration mode. The
mode {FC | Eth} command congures a unied port to operate at line rate and guarantees no trac loss.
• To congure breakout interfaces on a QSFP+ Ethernet port, use the interface breakout command in global Conguration mode.
1GE mode: Only SFP+ ports support 1GE; QSFP+ and QSFP28 ports 25-30 do not support 1GE.
Unied port groups
In an OS10 unied port group, all ports operate in either Ethernet or Fibre Channel mode — you cannot mix modes for ports in the same
unied port group. To activate Ethernet interfaces, congure a port group to operate in Ethernet mode and specify the port speed. To
activate Fibre Channel interfaces, see Fibre Channel interfaces.
On the S4148U-ON switch, the available Ethernet and Fibre Channel interfaces in a port group depend on the currently congured port
prole. For more information, see S4148U-ON port proles.
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Interfaces