this is a question for who has experience in RouterOS+MPLS
if I have a VPLS tunnel and I do a ping through the tunnel (using the Dont Fragment flag):
ping x.x.x.x -l 1472 -f
where x.x.x.x is an IP on the other end of the tunnel (I use 1472 because 20 bytes is for TCP + 8 bytes for ICMP = 28 bytes of overhead)
If the ping works and it is not fragmented, does it mean that MPLS+VPLS works properly and the MTU of the physical interfaces are ok?