Dell PowerSwitch S4112F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 259
Con negotiation modes on interfaces
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*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. Configure negotiation modes on interfaces On OS10, the auto negotiation mode is enabled by default. To force negotiation, use the following command: negotiation on To disable negotiation, use the following command: negotiation off To reset the negotiation mode to the default setting of the media you use, use one of the following commands: negotiation auto no negotiation Interfaces 259
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