Did I get it right, that it is not possible to enable container support without a physical access? In other words, as soon I enable it, I only have 5 minutes to reboot router physically?
I wonder how do people handle it in remote data centers with support that usually needs 24 hours to do anything with a device?
a good Technician would have configured the device mode for his needs before rolling it out live, its called planning ahead.... 24 hours if its a problem means you had no plan.