Cabletron Systems BRIM E100 BRIM-E100 User Manual

Chapter 5: Local ManagementPage 5-4BRIM-E100 User’s GuideCurrent Operational ModeDisplays the current active technology of the BRIM-E100. In the exampleshown in Figure 5-1, 100Base-TXFD (100 Mbps, full duplex) is thecurrent operational mode.Desired Operational ModeThis field allows the user to select the desired operational mode. The fieldtoggles between 100Base-FX and 100Base-FXFD (full duplex) when aBRIM-E100 with an FE-100FX fiber optic Fast Ethernet InterfaceModule is installed.If an FE-100TX module is installed in the BRIM-E100, the field stepsbetween Auto-Negotiation, 10Base-T, 10Base-TFD (full duplex),100Base-TX, and 100Base-TXFD (full duplex). In normal operation, theBRIM-E100 with an FE-100TX installed is capable of auto-negotiatingthe operational mode and no further user setup is required.Advertised AbilityDuring auto-negotiation, the FE-100TX “tells” the device at the other endof the segment what its capabilities are. The capabilities of a BRIM-E100with an FE-100TX installed are 10Base-T, 10Base-TFD (full duplex),100Base-TX, and 100Base-TXFD (full duplex). In normal operation,with all capabilities Enabled, the BRIM-E100 “advertises” that it has theability to operate in any mode. The Network Manager may choose to setup the BRIM-E100 so that only a portion of the available capabilities areadvertised and the others are disabled. For example, only 100Base-TXand 100Base-TXFD might be enabled so that only devices that operate at100 Mbps can communicate with the BRIM-E100.5.3 BRIM-E100 SETUPThis section provides instructions for configuring the BRIM-E100 witheither an FE-100TX module installed or with a fiber optic FE-100FXmodule installed.NOTEIn normal operation, the BRIM-E100 with an FE-100TXinstalled automatically establishes a link with the device at theother end of the segment without requiring user setup.However, Local Management provides the user with the optionof manually configuring the BRIM-E100.