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Dell EMC SmartFabric OS10 User Guide Release 10.5.1

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Configure breakout mode

Using a supported breakout cable, you can split a 40GE QSFP+ or 100GE QSFP28 Ethernet port into separate breakout interfaces. All breakout interfaces have the same speed. You can set a QSFP28 port to operate in 40GE mode with a QSFP+ transceiver. 
interface breakout node/slot/port map {10g-4x | 25g-4x | 40g-1x | 50g-2x |
100g-1x}
  • node/slot/port — Enter the physical port information.
  • 10g-4x — Split a QSFP28 or QSFP+ port into four 10G interfaces.
  • 25g-4x — Split a QSFP28 port into four 25G interfaces.
  • 40g-1x — Set a QSFP28 port to use with a QSFP+ 40G transceiver.
  • 50g-2x — Split a QSFP28 port into two 50G interfaces.
  • 100g-1x — Reset a QSFP28 port to 100G speed.

To configure an Ethernet breakout interface, use the interface ethernet node/slot/port:subport command in CONFIGURATION mode.

Each breakout interface operates at the configured speed. Use the no version of the interface breakout command to reset a port to its default speed: 40G or 100G.

To configure breakout interfaces on a unified port, use the mode {Eth | FC} command in Port-Group Configuration mode.

NOTE: You cannot configure the 40G ports 13, 14, 15, 16, 29, 30, 31, and 32 to split into four 10G interfaces on the S6010 platform.

Configure interface breakout 

OS10(config)# interface breakout 1/1/7 map 10g-4x

Display interface breakout 

OS10# show interface status

------------------------------------------------------------------
Port       Description  Status Speed Duplex Mode Vlan Tagged-Vlans
------------------------------------------------------------------
Eth 1/1/1               down   0     auto    -
Eth 1/1/2               down   0     auto    A    1    -
Eth 1/1/7:1             down   0     auto    A    1    -
Eth 1/1/7:2             down   0     auto    A    1    -
Eth 1/1/7:3             down   0     auto    A    1    -
Eth 1/1/7:4             down   0     auto    A    1    -
Eth 1/1/25              down   0     auto    A    1    -

Breakout Mode Restrictions

On the S5232F-ON switch, port 32 alone cannot be split into 10x4 or 25x4. Supported breakout modes for port 32 are:

  • 100G-1x Breakout to 1 100G interface
  • 50G-2x Breakout to 2 50G interfaces
  • 40G-1x Breakout to 1 40G interface

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