Dell MX5108n OS10 Enterprise Edition User Guide for PowerEdge MX IO Modules Re - Page 97
Unified port groups, Unified
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unified 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 unified and Ethernet ports. The difference is that in profile-1, by default SFP+ unified ports 1-24 come up in Fibre Channel mode with 2x16GFC breakouts per port group. In profile-2, by default SFP+ unified 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: Configure oversubscription to support bursty storage traffic on a Fibre Channel interface. Oversubscription allows a port to operate faster, but may result in traffic loss. To support oversubscription, use the speed command in Interface Configuration mode. This command is not supported on an Ethernet interface. In S4148U-ON port profiles: • 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 configure breakout interfaces on a unified port, use the mode {FC | Eth} command in Port-Group Configuration mode. The mode {FC | Eth} command configures a unified port to operate at line rate and guarantees no traffic loss. • To configure breakout interfaces on a QSFP+ Ethernet port, use the interface breakout command in global Configuration 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. Unified port groups In an OS10 unified port group, all ports operate in either Ethernet or Fibre Channel (FC) mode. You cannot mix modes for ports in the same unified port group. To activate Ethernet interfaces, configure 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 configured port profile. For more information, see S4148U-ON port profiles. Interfaces 97