ZyXEL Communications ES-100, Руководство пользователя

Страница: 66 / 232

Chapter 7 Configuration
MES-2110 User’s Guide
66
The following table describes the labels in this screen.
Table 10 Configuration > Port Configuration
LABEL DESCRIPTION
Port This is the port number.
Name Enter a descriptive name that identifies this port. You can enter
up to 64 alpha-numerical characters.
Note: Due to space limitation, the port name may be
truncated in some Web Configurator screens.
Admin Use this to enable or disable administrative access through this
port.
Speed Select the port’s current speed (10M for 10 Mbps and 100M for
100 Mbps). The speed for the fiber ports is fixed.
Duplex Use this field to change the status to Half or Full duplex mode.
The duplex status for the fiber ports is fixed.
AUTO Use this to enable or disable auto-negotiation.
AUTO (auto-negotiation) allows one port to negotiate with a peer
port automatically to obtain the connection speed and duplex
mode that both ends support. When auto-negotiation is turned
on, a port on the MES-2110 negotiates with the peer
automatically to determine the connection speed and duplex
mode. If the peer port does not support auto-negotiation or turns
off this feature, the MES-2110 determines the connection speed
by detecting the signal on the cable and using half duplex mode.
When the MES-2110’s auto-negotiation is turned off, a port uses
the pre-configured speed and duplex mode when making a
connection, thus requiring you to make sure that the settings of
the peer port are the same in order to connect.
Flow-Control Use this to enable or disable flow control.
A concentration of traffic on a port decreases port bandwidth and
overflows buffer memory causing frame discards and frame
losses. Flow Control is used to regulate transmission of signals
to match the bandwidth of the receiving port.
The MES-2110 uses IEEE802.3x flow control in full duplex mode
and backpressure flow control in half duplex mode.
IEEE802.3x flow control is used in full duplex mode to send a
pause signal to the sending port, causing it to temporarily stop
sending signals when the receiving port memory buffers fill.
Back Pressure flow control is typically used in half duplex mode to
send a "collision" signal to the sending port (mimicking a state of
frame collision) causing the sending port to temporarily stop
sending signals and resend later.
Port This indicates the port number
Name This indicates the descriptive named assigned to the port.
Admin This indicates whether administrative access is enabled or
disabled for this port.
Speed This indicates the speed assigned to the port (10M for 10 Mbps
and 100M for 100 Mbps).