With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
agentFileSystemBootImage
agent File System Boot Image
1.3.6.1.4.1.171.12.1.2.18.5.1.3
When displayed, it shows the current bootup image file name. When set, the set name will be set as the bootup image.
Back to AGENT-GENERAL-MIB MIB page.
IPHost Network monitor allows you to monitor agentFileSystemBootImage 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.