With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
tokenRingPStatsDataPktsGreaterThan18000Octets
token Ring P Stats Data Packets Greater Than18000 Octets
1.3.6.1.2.1.16.1.3.1.17
The total number of good non-MAC frames received that were greater than 18000 octets in length, excluding framing bits but including FCS octets.
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IPHost Network monitor allows you to monitor tokenRingPStatsDataPktsGreaterThan18000Octets 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 access points right now.