Dell EMC SmartFabric OS10 User Guide Release 10.5.0

Single-density QSFP28 interfaces

On the MX9116n Fabric Switching Engine module, a QSFP28 port group consists of one Ethernet 100G port. By default, QSFP28 port groups 13 and 14 (physical ports 41 and 42) operate in 1x100GE mode.

For information about how to configure QSFP28-DD port groups 1 to 12 to operate in Ethernet mode, see Double-density QSFP28 interfaces.

For information about how to configure unified port groups 15 and 16 to operate in Ethernet or Fibre Channel mode, see Unified port groups.

1. To configure a QSFP28 port-group interface, enter PORT-GROUP mode from CONFIGURATION mode. Enter 1/1 for node/slot. The QSFP28 port-group range is 13 to 14.

   port-group node/slot/port-group

2. Activate the QSFP28 port-group interface for Ethernet operation in PORT-GROUP mode.

   mode Eth {100g-1x | 50g-2x | 40g-1x | 25g-4x | 10g-4x}

   • 100g-1x — Reset a port group to 100GE mode.
   • 50g-2x — Split a QSFP28 port into two 50GE interfaces.
   • 40g-1x — Split a QSFP28 port into one 40GE interface.
   • 25g-4x — Split a QSFP28 port into four 25GE interfaces.
   • 10g-4x — Split a QSFP28D port into four 10GE interfaces.
3. Return to CONFIGURATION mode.

   exit

4. Enter Ethernet Interface mode to configure other settings. Enter a single interface, a hyphen-separated range, or multiple interfaces separated by commas.

   interface ethernet node/slot/port[:subport]

   To display the Ethernet ports in a QSFP28 port group, enter the show port-group command. To display the Ethernet 25GE subports, enter the show interfaces status command.

Configure QSFP28 port-group interface

OS10(config)# port-group 1/1/13
OS10(conf-pg-1/1/13)# mode Eth 25g-4x
OS10(conf-pg-1/1/13)# exit
OS10(config)# interface ethernet 1/1/41:4
OS10(conf-if-eth-1/1/41:4)# 

View QSFP28 port-group interface

OS10(config)# interface ethernet 1/1/41:4
OS10(conf-if-eth1/1/41:4)# show configuration
!
interface ethernet1/1/41:4
 no shutdown

View QSFP28 port groups and default modes

OS10# show port-group 
Port-group        Mode         Ports     FEM
... 
port-group1/1/13  Eth 100g-1x  41         -  
port-group1/1/14  Eth 100g-1x  42         -  
...

View QSFP28 breakout interfaces

OS10# show interface status 
---------------------------------------------------------------------------
Port        Description   Status   Speed    Duplex   Mode Vlan Tagged-Vlans
---------------------------------------------------------------------------
...
Eth 1/1/41:1              down     0        auto     A    1    - 
Eth 1/1/41:2              down     0        auto     A    1    - 
Eth 1/1/41:3              down     0        auto     A    1    - 
Eth 1/1/41:4              down     0        auto     A    1    - 
Eth 1/1/42:1              down     0        auto     A    1    - 
Eth 1/1/42:2              down     0        auto     A    1    - 
Eth 1/1/42:3              down     0        auto     A    1    - 
Eth 1/1/42:4              down     0        auto     A    1    - 
...