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 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 -

After you enter enable 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 (no shutdown) and assigned to the default VLAN. An Ethernet interface has no IP address and no

L2 switchport is congured (

no IP address).

• A Fibre Channel interface is disabled (shutdown).

Restrictions

The default interface command removes all software settings and all L3, VLAN, VXLAN, 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 an Ethernet interface is congured 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

Interfaces