Indicates allowable number of addresses to be learned on this VLAN from the special port. A value of -1 means no-limit. The default value is no-limit. Only VLANs with limitations will be displayed in this table. The max entry range is (0..N). The value N means the max number and is determined by the project itself.
Sources for this description
D-Link official switch MIBsD-Link MIB copies (LibreNMS/Observium Community)Netdisco MIB archive copies