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Acording to https://meraki.cisco.com/lib/pdf/meraki_datasheet_ms120.pdf the MS120 series has 6 QoS queues for VoIP/Video/Data.
I asked support what the MS120 support with QoS and got different replies.
Support says it has 8 QoS queues and does not support tcp/udp port ranges QoS configuration, another support told me, it support port ranges QoS.
I am surprised how bad their support is now a days. My questions are - is there 6 or 8 QoS queues, does it support tcp/udp port range QoS or only auto VoIP/Video/Data QoS?
Looking at MS 9.34 release notes under additions it says: QoS rules with port ranges
But does this also include MS120 series?
Tried upgrading a MS120-8 to 9.34 but a wireshark showed all packets was market with default 0 even though i have created QoS rules. (Btw. it is a bad version - the switch stopped to respond to network traffic so downgraded to 9.32).
Not sure about the 120. the 220 however support cos 0-5 on the dashboard so only 6 queues possible to configure. (if there are 8, cos 6 and 7 are most times dedicated for management protocol packets.)
QoS remarking should work if you set the correct vlan / tcp/udp src-dst, combined with the "set-dscp to" option. did you check on DSCP value in the trace?
A trace showed all packets with DSCP value of 0 (default) even though i tried to set a policy like:
vlan 100 -> Protocal ANY -> Source port ANY -> Dest port ANY -> set DSCP to 34
All packets was marked 0.
From my understanding - wireshark is software driven hence the capture and the write process of each packet is done before the markings - that is why when you do a wireshark capture on the device DSCP is set to (0) - the work around for was to mirror the port in question and connect your laptop to the mirrored port and run a capture off your connected device - there you will see the markings at least I did...