With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swL3RelayBootpHopCount
Switch L3 Relay Bootp Hop Count
1.3.6.1.4.1.171.11.70.5.3.3.1.2
This object indicates the maximum number of router hops that the BOOTP packets can cross.
Back to SWL3MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swL3RelayBootpHopCount 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.