Reference Guide

• 25g-4x — Split a QSFP28 port into four 25G interfaces.

• 40g-1x — Set a QSFP28 port for 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 congure an Ethernet breakout interface, enter the interface ethernet node/slot/port:subport command in

CONFIGURATION mode.

Each breakout interface operates at the congured speed. Enter the no version of the interface breakout command to reset a port

to its default speed — 40G or 100G.

To congure breakout interfaces on a unied port, enter the mode {Eth | FC} command in Port-Group Conguration mode.

Congure 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 auto-conguration

You can globally enable front-panel Ethernet ports to automatically detect SFP pluggable media in a QSFP+ or QSFP28 port. The port

autocongures breakout interfaces for media type and speed. For example, if you plug a 40G DAC cable with 4x10G far-side transceivers

into a QSFP28 port, the port autocongures in 10g-4x Interface-breakout mode.

enable auto-breakout

RJ-45 ports and ports that are members of a port group do not support breakout auto-conguration. The breakout auto-conguration

feature is disabled by default.

Enable breakout auto-conguration

OS10# enable auto-breakout

Display breakout auto-conguration

Before you plug a cable in Ethernet port 1/1/25:

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 1/1/25 down 0 auto A 1 -

Eth 1/1/29 down 0 auto A 1 -

Interfaces