Brocade Network OS Administrator’s Guide v4.1.1 - Manual (Page 546)

a) The Brocade VDX 6740, 6740T, and 6740T-1G create interfaces corresponding to the
SFP breakout mode of each port. For a QSFP, a single Fo interface is created in disable
mode and four Te interfaces are created in enable mode.
b) The SFP interfaces under the new mode come up in default configurations as if the system
were booting up for the first time. Unaffected interfaces retain their original configurations
before the switch reboot is applied.
Configuring additional breakout mode scenarios
The following configuration examples show how to set a 40G QSFP into breakout mode, reserve a
40G QSFP port while in breakout mode, and release a 40G QSFP port while in breakout mode.
Setting a 40G QSFP port into breakout mode
The following example shows you how to set a 40G QSFP port into breakout mode and then manually
reserving and releasing the 40G port DPOD reservation.
NOTE
When the copy default-config startup-config command is issued in logical chassis mode, the
breakout interface configuration will be lost, along with the rest of the configuration. To apply breakout
mode, you must shut down the 40G port, then start the configuration download operation. If the port is
not shut down during configuration download, you must configure breakout mode manually.
switch# config
Entering configuration mode terminal
switch(config)# interface FortyGigabitEthernet 48/0/49
switch(conf-if-fo-48/0/49)# shut
switch(conf-if-fo-48/0/49)# exit
switch(config)# hardware
switch(config-hardware)# connector 48/0/49
switch(config-connector-48/0/49)# sfp breakout
%Warning: Sfp Breakout is a disruptive command.
Please save the running-config to startup-config and a power-cycle for the changes
to take place.
switch(config-connector-48/0/49)# do copy running-config startup-config
This operation will modify your startup configuration. Do you want to continue? [y/
n]:y
switch(config-connector-48/0/49)# do reload
Warning: Unsaved configuration will be lost. Please run `copy running-config startup-
config` to save the current configuration if not done already.
Are you sure you want to reload the switch? [y/n]:y
The system is going down for reload NOW !!
switch# show ip int br
Interface IP-Address Vrf Status
Protocol
========================== ========== ================ =========
=========
FortyGigabitEthernet 48/0/50 unassigned default-vrf up down
FortyGigabitEthernet 48/0/51 unassigned default-vrf up down
FortyGigabitEthernet 48/0/52 unassigned default-vrf up down
TenGigabitEthernet 48/0/1 unassigned default-vrf up up (ISL)
TenGigabitEthernet 48/0/2 unassigned default-vrf up down
TenGigabitEthernet 48/0/3 unassigned default-vrf up down
Configuring additional breakout mode scenarios
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