QFX interface breakout
To configure a block of 40-Gigabit Ethernet (et) ports on QFX3500, QFX3600, QFX5100, EX4600 switches to operate as 10-Gigabit Ethernet ports, specify a port range and channel speed:
user@switch# set port-range port–range-low port-range-high channel-speed speed
For example, to configure ports 0 through 3 on PIC 1 to operate as 10-Gigabit Ethernet ports:
user@switch# set port-range 0 3 channel-speed 10g
To configure just one single port to operate as 10-Gigabit Ethernet port:
After commiting this config, 40G port et-0/0/50 will be converted to four 10G ports with names xe-0/0/50:0 — xe-0/0/50:3
To return a range of ports on QFX3500, QFX3600, QFX5100, and EX4600 switches to the default 40-Gigabit Ethernet configuration, delete the 10g statement:
user@switch# delete port-range port-range-low port-range-high channel-speed speed
For example, to return ports 0 through 3 to the default 40-Gigabit Ethernet configuration:
user@switch# delete port-range 0 3 channel-speed 10g
To disable auto-channelization at the port level, include the disable statement:
Source – QFX Interfaces Feature Guide