Hello,
I've been using a RB750GL for a long time and been very happy with it.
A month ago I've switched ISP to a faster one.
I noticed the CPU become a bottleneck and turned on fasttrack.
At the same time I've also upgraded from 6.45.9 to the then latest version 6.47.1
Since that the router randomly becomes unresponsive: port lights are keep flashing but I can not connect by any means not even ping it.
Plugging in/out any or all UTP cables makes no different, I need to power cycle it.
Then it will keep working perfectly and fast anywhere from a minute to a week, average uptime 4 days.
Before this change it would run for years.
At first I assumed the faster connection induced heavier load and replaced the power adapter, but now I'm over the third adapter and the issues persists.
In retrospect it was a silly assumption as fasttrack lowered the load by large.
Naturally there were a number of other changes at the time of the ISP changing, fasttrack is only my best bet being the change that have never been on this router done before.
Today browsing these forums I noted there were issues with fasstrack earlier, so I updated to the current LTS release 6.48.5.
However there's nothing in the release notes about fasstrack.
I've considered switching to the latest stable but did not as I've seen no fasstrack bug fixed there either.
ATM I am unsure I'm still sitting on a time bomb, so advice is welcome.
Cheers, Ákos