• Port Breakout is supported on all 100g interfaces except the ports having an external phy. These external phy ports can be seen using command show hsl extphy status.

• You cannot change one port breakout mode (4X10G, 4X25G) to the other mode (4X10G, 4X25G) directly. You must remove the breakout configuration to change the mode.

• Port breakout is not supported on ports which contains sub-interfaces or any other services running over it. To breakout, all services on the interfaces need to be un-configured. After breakout, all the services can be configured on breakout ports.

• While configuring port-breakout, you need to reduce the speed of some interface if this error message is displayed: "%% Max egress credit limit reached". This is due to hardware limitation.