re: cisco SG300 & ME1, these work amazingly well – if you know what to disable.
i have 4 me1’s and the monitor link on a vlan since i am also running some dante devices.
there are many parameters to disable as already detailed by the A&H support documents (stp, qos, etc), but you’ll still have to find a few more to be entirely click free. the two remaining things to look at are the following:
1. make sure your vlan port memebers are untagged, if you’re on a vlan.
2. disable LLDP discovery and CDP discovery. they can be found in the web gui under the administration tab.
after that, plus A&H’s requirements, you should be good to go!