Table 6-2 Port Edit Screen - ZyXEL Communications ZyXEL Dimension ES-3024 User Manual

Dimension ES-3024 Ethernet Switch
LABEL
Active A port must be enabled for data transmission to occur. Select Active to
enable the port.
Name Choose a descriptive name for port identification purposes.
Default 802.1P This priority value is added to incoming frames without a (802.1p)
Priority priority queue tag. See Priority Queue Assignment in Table 5-4
Switch Setup for more information.
Limiting Number Use this field to limit the number of (dynamic) MAC addresses that may
of Learned MAC be learned on a port. For example, if you set this field to "5" on port 2,
Address then only the devices with these five learned MAC addresses may
access port 2 at any one time. A sixth device would have to wait until
one of the five learned MAC addresses aged out. MAC-address aging
out time can be set in the Switch Setup screen. The valid range is
from "0" to "254". "0" means this feature is disabled, so the switch will
learn MAC addresses up to the global limit of 16K.
Type This read-only label displays the type of port you are currently
configuring.
Speed Select the speed of the Ethernet connection on this port. Auto (auto-
negotiation) makes one Ethernet port able to negotiate with a peer
automatically to obtain the connection speed and duplex mode that
both ends support. When auto-negotiation is turned on, an Ethernet
port on the switch negotiates with the peer automatically to determine
the connection speed and duplex mode. If the peer Ethernet port does
not support auto-negotiation or turns off this feature, the switch
determines the connection speed by detecting the signal on the cable
and using half duplex mode. When the switch's auto-negotiation is
turned off, an Ethernet 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 Ethernet port are the same in order to connect.
Duplex Select a duplex mode from half duplex (Half), full duplex (Full) or
(N/A). N/A displays when auto-negotiation is turned on, as the Ethernet
port on the switch negotiates with the peer automatically to determine
the connection speed and duplex mode.
Flow Control A concentration of traffic on a port decreases port bandwidth and
overflows buffer memory causing packet discards and frame losses.
Flow Control is used to regulate transmission of signals to match the
bandwidth of the receiving port.
The ES-3024 uses IEEE802.3x flow control in full duplex mode and
backpressure flow control in half duplex mode.
IEEE802.3 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
packet collision) causing the sending port to temporarily stop sending
signals and resend later. Select Flow Control to enable it.
6-4

Table 6-2 Port Edit Screen

DESCRIPTION EXAMPLE
Joe
0 (default)
0
10/100M
Auto
Full
Port Setup