Dell EMC Networking OS10 S4148F/S4148T/S4148FE Ports Eth 1/1/27 and 1/1/28 Missing in the Default Port-Profile

Table of Contents  

1.  Summary
2.  Products Affected
3.  S4148T/S4148F/S4148FE Port-Profiles
4.  S4148U Port Profiles
5.  Solution- Changing Port Profiles

 

Summary 

On the S4148F/FE/T the 2x QSFP+ ports Eth 1/1/27 and 1/1/28 are not able to be configured, and are missing from output such as show interface status. 
When trying to configure either port, the following error is seen: 
% Error: ethernet1/1/27 is not configurable 
The switch is functioning as designed, this is the result of the default port-profile configuration, which can be changed.  

The S4148U has different default port-profile, which doesn't affect ports 1/1/27 and 1/1/28 in the same way; it has different port profile options as well. 

 

Products Affected  

S4148F
S4148T
S4148FE
S4148U

Please refer to SLN318659 for information on port-group configuration, which applies only to the S4148U.

 

S4148T/S4148F/S4148FE Port-Profiles

On the S4148-ON series, port profiles determine the available front-panel Ethernet ports and supported breakout interfaces on uplink ports. In the port profile illustration, blue boxes indicate the supported ports and breakout interfaces. Blank spaces indicate ports and speeds that are not available.

• 10GE mode is an SFP+ 10GE port or a 4x10G breakout of a QSFP+ or QSFP28 port.
• 25GE is a 4x25G breakout of a QSFP28 port.
• 40GE mode is a QSFP+ port or a QSFP28 port that supports QSFP+ 40GE transceivers.
• 50GE is a 2x50G breakout of a QSFP28 port.
• 100GE mode is a QSFP28 port.

   

  

S4148U Port Profiles

 

S4148U-ON port profiles determine the available front-panel unified and Ethernet ports and supported breakout interfaces. In the port profile illustration, blue boxes indicate the supported Ethernet port modes and breakout interfaces; red boxes indicate the supported Fibre Channel port modes and breakout interfaces. Blank spaces indicate ports and speeds that are not available. Unified port groups are numbered 1-10.

S4148U-ON unified port modes-SFP+ ports 1-24 and QSFP28 ports 25-26 and 29-30:

• 10GE is an SFP+ port in Ethernet mode or a 4x10G breakout of a QSFP+ or QSFP28 port in Ethernet mode.
•  25GE is a 4x25G breakout of a QSFP28 Ethernet port.
• 40GE is a QSFP+ or QSFP28 Ethernet port that uses QSFP+ 40GE transceivers.
• 50GE is a 2x50G breakout of a QSFP28 Ethernet port.
• 100GE is a QSFP28 Ethernet port.
• 4x8GFC are breakout interfaces in an SFP+ or QSFP28 FC port group.
• 2x16GFC are breakout interfaces (subports 1 and 3) in an SFP+ or QSFP28 FC port group,
• 4x16GFC are breakout interfaces in a QSFP28 FC port group.
• 1x32GFC (subport 1) are breakout interfaces in a QSFP28 FC port group.

S4148U-ON Ethernet modes-QSFP+ ports 27-28 and SFP+ ports 31-54:

• 10GE mode is an SFP+ 10GE port or a 4x10G breakout of a QSFP+ port.
• 40GE mode is a QSFP+ port.

*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.

**Over subscription: Configure over subscription to support bursty storage traffic on a Fibre Channel interface. Over subscription allows a port to operate faster, but may result in traffic loss. To support over subscription, 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 over subscription on member interfaces.
• QSFP28 ports in 2x16GFC mode support 32GFC over subscription. SFP+ port groups in 2x16GFC mode do not support 32GFC over subscription. 2x16GFC mode activates subports 1 and 3.
• QSFP28 ports in 4x16GFC mode support 32GFC over subscription.

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 25-30 do not support 1GE. (S4148U Only) 
  
   

  Solution- Changing Port-Profiles 

  
   

  A port profile determines the enabled front-panel ports and supported breakout modes on Ethernet and unified ports. Change the port profile on a switch to customize uplink and unified port operation, and the availability of front-panel data ports. To change the port profile at the next reboot, enter the switch-port-profile command with the desired profile, save it to the startup configuration, and reload the switch. 
  
   
  Changing the port-profile will erase almost the entire switch configuration, with only a few exceptions.
   

  CLI Command	Parameter
  show switch-port-profile	Shows the current port-profile, and the one selected for the next boot. Also displays node/unit information.
  configure terminal	Enter configuration mode
  switch-port-profile node/unit profile-#	For a standalone unit, the node/unit will be 1/1, and then select the profile with the desired port configuration options.
  end	Exit out of configuration mode, back to privilege exec mode
  write memory	Save the change
  reload	Restart the switch to load the new port-profile
  show switch-port-profile	Verify port profile

   

  The switch will need to be restarted to load the new port-profile. The switch reboots with the new port configuration and resets the system defaults, except for the switch-port profile and these configured settings:

  • Management interface 1/1/1 configuration

  • Management IPv4/IPv6 static routes

  • System hostname

  • Unified Forwarding Table (UFT) mode

  • ECMP maximum paths

  All other settings on a switch will need to be manually reconfigured after you apply a new port profile and reload the switch.