D-Link DFE-2616I User Guide - Page 31

If there is a DFE-2616i, DFE-2616ix, DFE-2624i, or DFE-2624ix master hub in the stack, then ports can be manually disabled and enabled via the on-board console interface or via an SNMP-based network management program such as D-Link D-View Network Management Program. You can choose to partition a port even when there is nothing wrong with it, for example, to prevent a certain device from accessing the network. SNMP Indicator (Master models only) This indicator comes on when the SNMP agent of a DFE-2600 series master hub is active. In a stack with both a Primary and a Backup Master, the SNMP LED of the Primary master will be lit and will flash to indicate SNMP activity. The SNMP LED of the Backup Master will remain off at all times. Port Speed Indicators There is also a port speed indicator for each of the twisted-pair ports on the hub. A port speed indicator should light green when a 100BASE-TX device is connected to the port, and remain dark if the port is unconnected or if a 10BASE-T device is connected. Console Port Indicator (CON) (Master models only.) This indicator lights continuously under the following two conditions: Understanding Indicators 19