With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swMacBasedAuthInfoBlockTime
sw Mac Based Authorization Info Block Time
This object indicates the remaining time until the authentication failure client is allowed to start a new authentication. -1 will be displayed after the port or MAC address passes authentication. -2 indicates the host block timeout, but MAC-based Access Control will hold this entry for expired (for stacking performance), after the time has expired, then the switch will delete it.
Back to Mac-Based-Authentication-MIB MIB page.
IPHost Network monitor allows you to monitor swMacBasedAuthInfoBlockTime on D-Link device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring D-Link switches right now.