Start time switch/bridge -Hap AC Lite

Hi.The operating system in my HAP AC Lite starts approximately 30 seconds. Do we have any definitive information on the pre-bootup config for switch chips in the low-end MT routers (HAP AC Lite in particular)?
For example, in the first few seconds of power-up, are the ports switched together (before the OS is running?). The most important thing for me is the time to run Bridge (between Ether2 and Ether3)

Every device startup time can be different.
I have e.g. a mAP Lite which boots in 15 seconds.
Not sure when the bridge comes active though …

Logically thinking during those first seconds nothing will happen putting your system at risk.
Or is that not your concern ?

Check the log. It contains some information on starting interfaces