Version 6 is not working correctly bonding.
On RB1200 3 interface bonding type balance r-r.
In version 5, an interface equal number of Mbps (eth1 50Mbit, eth2 50Mbit, eth3 50Mbit)
In version 6, the balance r-r does not distribute traffic equally (eth1 20Mbit, eth2 70Mbit, eth3 60Mbit)
Thank you!