Hi,
Last time I upgraded my CCR-1009, there had been major breaking changes between versions,i.e. the new bridge way of programming vlans and the upgrade bacame a nightmare for me, I was locked out of my system and took a lot of down time. I know this may seem silly but I haven’t upgraded since that time and I just wanted to check with you guys if it is “safe” to upgrade from 6.48.1 to 6.49.17 or if there have been major breaking changes betwen those versions too ?
I have a similar device running on version 7.
The best bet is to take one port off the bridge give it an IP address and then you can access the config safely from your laptop or PC, set IPV4 settings to match.
If you need assistance in slow time to changeover to vers7 let me know
And this is why anav is the GOAT. He might be brisk. He might be bristly. But he routinely goes above and beyond to help others find their way in the Mikrotik ecosystem. Now if we could only do something about the Canadian thing … 
@yxudous: if you don’t feel like going for v7 (I’d recommend you to do it though, you’ll be fine in hands of @anav and even if he won’t be able to help, there are other experienced users of this forum willing to help), then you can safely upgrade from 6.48.1 to 6.49.17 … there were no major (breaking) changes between these versions.
Good point mkx!
You forgot flatulence, one of my fortes!