Switch ports are listed as suspended
If your switch ports are part of a link aggregation group, and those interfaces are listed as suspended, check the LAG configuration on the other end.
Indicator: TwentyFiveGigE2/0/3 is up, line protocol is down (suspended)
FreeBSD doesn’t honour any create_args_laggX variables in /etc/rc.conf if the laggX interface already exists. Either adjust laggX manually or destroy the laggX interface using ifconfig laggX destroy while in single-user mode.
Solved: TwentyFiveGigE2/0/3 is up, line protocol is up (connected)