Connectivity Guide

• To congure breakout interfaces on a unied port, use the mode {FC | Eth} command in Port-Group Conguration mode. The
mode {FC | Eth} command congures a unied port to operate at line rate and guarantees no trac loss.
• To congure breakout interfaces on a QSFP+ Ethernet port, use the interface breakout command in global Conguration mode.
1GE mode: Only SFP+ ports support 1GE; QSFP+ and QSFP28 ports 25 to 30 do not support 1GE.
To view the ports that belong to each port group, use the show port-group command.
Congure breakout mode
Using a supported breakout cable, you can split a 40GE QSFP+ or 100GE QSFP28 Ethernet port into separate breakout interfaces. All
breakout interfaces have the same speed. You can set a QSFP28 port to operate in 40GE mode with a QSFP+ transceiver.
interface breakout node/slot/port map {10g-4x | 25g-4x | 40g-1x | 50g-2x |
100g-1x}
• node/slot/port — Enter the physical port information.
• 10g-4x — Split a QSFP28 or QSFP+ port into four 10G interfaces.
• 25g-4x — Split a QSFP28 port into four 25G interfaces.
• 40g-1x — Set a QSFP28 port to 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, 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.
Interfaces
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