According to https://github.com/Azure/SONiC/wiki/Port-Breakout-High-Level-Design,
A 100G port can be breakout to four 25G ports.
If we want to use two color to recognize port speed,
such as port up at 100G with white coler, non-100G with green color,
Have any porting guide to reference?

As far as we know that init port led is by "rcload ${PLATFORM_DIR}/led_proc_init.soc "
(https://github.com/Azure/sonic-buildimage/blob/master/platform/broadcom/docker-syncd-brcm/start.sh),
it use "led auto on" command to register led linkscan callback.
The cb seems only trun on 0x01 present LINKUP, we can not know the port up with what speed.