Reference Guide

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 -

Eth 1/1/2 down 0 auto A 1 -

Eth 1/1/25:1 down 0 auto A 1 -

Eth 1/1/25:2 down 0 auto A 1 -

Eth 1/1/25:3 down 0 auto A 1 -

Eth 1/1/25:4 down 0 auto A 1 -

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

Reset default conguration

You can clear all congured settings on an Ethernet or Fibre Channel interface and reset the interface to its default settings. By default:

• An Ethernet interface is enabled, using the no shutdown command, and assigned to the default VLAN.

• A Fibre Channel interface is disabled, using theshutdown command.

Restrictions

The default interface command removes all software settings and all L3, VLAN, and port-channel congurations on a port interface.

However, the command does not remove congurations to the interface from other software features, such as VLT. If you do not remove

these congured settings, the command does not execute. For example, if you congure an Ethernet interface as a discovery interface in a

VLT domain and you do not delete this setting, resetting the interface to its default conguration fails:

OS10(config)# vlt-domain 10

OS10(conf-vlt-10)# discovery-interface ethernet 1/1/1

OS10(conf-vlt-10)# exit

OS10(config)# default interface ethernet 1/1/1

Interfaces