Synchronous Ports (Models With Pic Bay); Switch Ports; Port Speed And Duplex Mode - Allied Telesis AR410 User Manual

Physical and Layer 2 Interfaces
Software Release 2.7.1
C613-02021-00 REV F

Synchronous Ports (models with PIC bay)

You can use the asynchronous console port on the base unit to configure the
router. Additional asynchronous ports can also connect terminals, printers and
terminal ports on host computers.
Your router supports synchronous interfaces with speeds of up to 2.048 Mbps,
also known as E1. The router will automatically generate a clock signal when a
DCE transition cable is connected to a synchronous interface (see the Hardware
Reference for details of how to construct a cable).
To set the clock speed, enter the command:
SET SYN=n SPEED=speed
For more information about synchronous interfaces, see the Interfaces chapter
in the Software Reference.

Switch Ports

A switch port is one of the physical Ethernet interfaces on the base router unit.
Each switch port is uniquely identified by a port number.
To display information about switch ports, enter the command:
SHOW SWITCH PORT[={port-list|ALL}]
All switch ports on the router are enabled by default. You can disable and
enable a switch port as required. To enable or disable a switch port, enter the
commands:
ENABLE SWITCH PORT={port-list|ALL}
DISABLE SWITCH PORT={port-list|ALL}

Port Speed and Duplex Mode

Switch ports can operate at either 10 Mbps or 100 Mbps, in either full duplex or
half duplex mode. In full duplex mode a port can transmit and receive data
simultaneously. In half duplex mode a port can either transmit or receive data,
but not at the same time. This versatility makes it possible to connect devices
with different speeds and duplex modes to different switch ports. Such
versatility also requires that each switch port knows which speed and mode to
use.
Each switch port can be either configured with a fixed speed and duplex mode,
or configured to autonegotiate speed and duplex mode with a device
connected to it to determine a speed and mode that will allow successful
transmission. Setting the switch port to a fixed speed and duplex mode allows
the port to support equipment that cannot autonegotiate. Autonegotiation
allows the switch ports to adjust their speed and duplex mode to accommodate
the devices connected to them. An autonegotiating switch port will adopt the
speed and duplex mode required by devices connected to it. If another
autonegotiating device is connected to the switch port, they will negotiate the
highest possible common speed and duplex mode. When a port at one end of
the link is set to a fixed speed (non-autonegotiating) set the port at the other
end of the link to operate at the same speed. This is because when
autonegotiation is disabled, the link partner is not able to determine the duplex
mode of the link and must be forced to use the correct mode.
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