Help please!!! 
We are running a satellite site with one of the small 5 port microtik devices (v5.26) which connects via PPTP to our HQ site, also running v5.26 on a larger rack mount Microtik.
The tunnel runs okay for 60-90 seconds, then I’ll lose ping to the internal interface on the satellite box for 5 or 6 seconds. Then the tunnel will restart and be okay for a minute or two again.
Not much in the logs except entries like this:
InputFilter: input: in:WAN Bridge out:(none), src-mac a0:cf:5b:0b:18:42, proto TCP (SYN), 195.39.86.85:45195->66.51.xxx.xxx:33894, len 40
I have no idea who the 195.39.86.85 address is. Neither device seems to be logging errors related to the PPTP tunnel dying every minute.