With IPHost Network Monitor you can run simple snmp requests against a Dell device in your network.
serialPort2Mode
serial Port2 Mode
1.3.6.1.4.1.318.1.1.3.1.2.1.1
Setting this variable to passthrough will enable mini's port2 behave like a UPS port. Choosing localConsole will enable the port to be used as local console.
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IPHost Network monitor allows you to monitor serialPort2Mode on Dell device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Dell switches right now.