This value holds the list of community VLAN IDs mapped to a given primary VLAN, where devices in the same community VLAN can communicate with each other, unlike isolated VLAN members, but not with other communities. Administrators configure this to group related ports, like several ports belonging to the same tenant or department, while still segmenting them from other private VLAN groups. For example, this might list VLANs 151 and 152 as two separate community groups both mapped under the same primary VLAN.