Reference Guide

Usage information After you enter the feature auto-breakout command and plug a supported breakout cable in a QSFP+ or
QSFP28 port, the port autocongures breakout interfaces for media type and speed.
Use the interface breakout command to manually congure breakout interfaces. The media type plugged
into a port is no longer automatically learned. The
no version of this command disables the auto-breakout feature.
Example
OS10(config)# feature auto-breakout
Supported releases 10.4.0E(R1) or later
fec
Congures Forward Error Correction on 25G, 50G, and 100G interfaces.
Syntax
fec {CL74-FC | CL91-RS | CL108-RS | off}
Parameters
• CL74-FC — Supports 25G and 50G
• CL91-RS — Supports 100G
• CL108-RS — Supports 25G and 50G
• off — Disables FEC
Defaults
• For 25G and 50G interfaces: o
• For 100G interfaces: CL91-RS
Command Mode CONFIGURATION
Usage Information
The no version of this command resets the value to the default.
Example
OS10(config)# interface ethernet 1/1/41
OS10(conf-if-eth1/1/41)# fec CL91-RS
Supported Releases 10.3.0E or later
interface breakout
Splits a front-panel Ethernet port into multiple breakout interfaces.
Syntax
interface breakout node/slot/port map {100g-1x | 50g-2x |40g-1x | 25g-4x |
10g-4x10g-4x | 25g-4x}
Parameters
• node/slot/port — Enter the physical port information.
• 100g-1x — Reset a QSFP28 port to 100G speed.
• 50g-2x — Split a QSFP28 port into two 50GE interfaces.
• 40g-1x — Set a QSFP28 port for use with a QSFP+ 40GE transceiver.
• 25g-4x — Split a QSFP28 port into four 25GE interfaces.
• 10g-4x — Split a QSFP28 or QSFP+ port into four 10GE interfaces
Default Not congured
Interfaces 101