I'm not exactly new to Mikrotik and RouterOS in general, but aside from simple queues for DL/UL limitations, I've worked very little with them.

I'd like to employ a simple priority measure for the IPSEC/ESP tunnel we installed between 2 offices. Sometimes the tunnel suffers because of other inetrnet activity. I don't want to restrict traffic in any specific way but IPSEC must have the greatest priority and/or a minimum of BW allotted to it.

Could anyone point me to the right direction? Should I use a queue tree? Can I solve it using simple packet/conn. marks + simple queue? Any advice is greatly appreciated.