Connectivity Guide

Table Of Contents
100g-1x — Reset a QSFP28 port to 100G speed.
To congure an Ethernet breakout interface, use the interface ethernet node/slot/port:subport command in
CONFIGURATION mode.
Each breakout interface operates at the congured speed. Use 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, use 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 direct attach cable (DAC) with 4x10G far-side
transceivers into a QSFP28 port, the port autocongures in 10g-4x Interface-breakout mode.
RJ-45 ports and ports that are members of a port group do not support breakout auto-conguration. Breakout auto-conguration is
disabled by default.
Enable breakout auto-conguration
OS10(config)# feature 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 -
After you enter feature auto-breakout and plug a breakout 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 -
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Interfaces