I connected the MR´s with trunk (to get different WLAN´s into different VLAN´s). But I did an allowed VLAN at the trunk ports to avoid spanning-tree issues. I allowed only the necessary VLANs on the ports with MR´s and I switched on "BPDU-guard" because in fact it´s an edge port. We have different networks with MR42, MR44, MR45, MR46, MR52, MR84 and so on. Switches are MS120, MS220 and MS225. Running firmware is MR28.4 for the accesspoints and MS14.24 up to MS14.29 for the switches.
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