Cabletron Systems 2E48-27R - Manual (Page 98)

Chapter 5: Local Management
5-52 2E48-27R/2E49-27R User’s Guide
Current Oper. Mode (Read-only)
This field displays the current operating mode of ports 25 and 26.
Depending on whether a 100BASE-FX or 100BASE-TX Fast Ethernet
Interface Module is installed, this field displays the following:
• With a 100BASE-FX interface: 100Base-FX, 100Base-FXFD (full
duplex), or N/A when the port slot is empty.
• With a 100BASE-TX interface: Unknown, 10Base-T, 10Base-TFD
(full duplex), 100Base-TX, 100Base-TXFD (full duplex), or N/A
when the port slot is empty.
Desired Oper. Mode (Selectable)
This field allows the user to select the desired operational mode for an
interface in port 25 or 26. The field toggles between 100Base-FX and
100Base-FXFD (full duplex) when an FE-100FX or FE-100F3 is
installed.
Section 5.15.1 describes how to configure a port with an
FE-100FX or FE-100F3.
If an FE-100TX is installed, the field steps to Auto-Negotiation,
10Base-T, 10Base-TFD (full duplex), 100Base-TX, and 100Base-TXFD
(full duplex). In normal operation, the port with an FE-100TX installed is
capable of auto-negotiating the operational mode and no further user
setup is required.
Section 5.15.2 describes how to manually configure an
FE-100TX.
In Auto-Negotiation, the FE-100TX negotiates to the highest common
denominator of the two interfaces. The order of priority of negotiation is
100Base-TXFD, 100Base-TX, 10Base-TFD, and 10Base-T.
NOTE
In normal operation, the port with an FE-100TX installed
automatically establishes a link with the device at the other end
of the segment without requiring user setup. However, Local
Management provides the user with the option of manually
configuring that port.