Divide the 40G interface into 4 10G interfaces
# Split the 40GE interface FortyGigE1/0/1 into four 10GE interfaces.
<System> system-view
[System] interface fortygige 1/0/1
[System-FortyGigE1/0/1] using tengige
The interface FortyGigE1/0/1 will be deleted. Continue? [Y/N]:y
#Combine the 10GE interface split from the 40GE interface into a 40GE interface.
<System> system-view
[System] interface ten-gigabitethernet1/0/1:1
[System-Ten-GigabitEthernet1/0/1:1] using fortygige
The interfaces Ten-GigabitEthernet1/0/1:1 through Ten-GigabitEthernet1/0/1:4 will be deleted. Continue? [Y/N]:y