SwOS: prioritize traffic to/from an IP address

SwOS
1

We have an RB260GSP that carries a lot of traffic, some of which goes to our SIP server. Obviously, we want to make sure that SIP packets are forwarded before other traffic.

Our SIP server’s IP is 10.10.10.10 (for purposes of this exercise), and we have two entries in the ACL, with everything blank except:

(select) IP Src: 10.10.10.10
(set) Priority: 5

(select) IP Dst: 10.10.10.10
(set) Priority: 5

In other words, one ACL selects all traffic going to the SIP server and assigns it priority 5, and the other selects all traffic coming from the SIP server and assigns it priority 5.

Is this enough to prioritize our SIP traffic above everything else? Or do we also have to add catch-all rules that set all other traffic to a lower priority?

2

For the record, Mikrotik’s reply:

The RB260GSP switch is capable of setting/changing priority in packets but it cannot and does not do prioritizing in itself. The QoS prioritizing has to be done in other device.

This is understandable since the switches have limited RAM and CPU. Unfortunately, for us this means swapping out our 260s for hEX PoEs wherever voice traffic is mixing with large quantities of other traffic.