Port Error Disabled - D-Link xStack DGS-3400 Series Reference Manual

x Stack
Speed/Duplex
Use the Speed/Duplex pull-down menu to select the speed and duplex/half-duplex state of the
port. Auto denotes auto-negotiation between 10 and 1000 Mbps devices, in full- or half-duplex.
The Auto setting allows the port to automatically determine the fastest settings the device the
port is connected to can handle, and then to use those settings. Options are Auto, 10M/Half,
10M/Full, 100M/Half, 100M/Full, 1000M/Full_Master and 1000M/Full_Slave, and 1000M/Full.
There is no automatic adjustment of port settings with any option other than Auto.
The Switch allows the user to configure two types of gigabit connections; 1000M/Full_Master
and 1000M/Full_Slave. Gigabit connections only support full duplex connections and take on
certain characteristics that are different from the other choices listed.
The 1000M/Full_Master and 1000M/Full_Slave parameters refer to connections running a
1000BASE-T cable for connection between the Switch port and other device capable of a
gigabit connection. The master setting (1000M/Full_Master) will allow the port to advertise
capabilities related to duplex, speed and physical layer type. The master setting will also
determine the master and slave relationship between the two connected physical layers. This
relationship is necessary for establishing the timing control between the two physical layers.
The timing control is set on a master physical layer by a local source. The slave setting
(1000M/Full_Slave) uses loop timing, where the timing comes form a data stream received
from the master. If one connection is set for 1000M/Full_Master, the other side of the
connection must be set for 1000M/Full_Slave. Any other configuration will result in a link down
status for both ports.
Capability
The speed and duplex capability are advertised during auto negotiation. If the speed of a port
Advertised
is set to auto, this defines the speed and duplex that the port can be supported. The partner
can determine the speed and duplex according to the information.
Auto
Tick the check box to restart auto negotiation.
Negotiation
Click Apply to implement the new settings on the Switch.

Port Error Disabled

The following window will display the information about ports that have had their connection status disabled, for reasons such as
STP loopback detection or link down status.
To view this window, click Administration > Port Configuration > Port Error Disabled, as shown below.
The following parameters are displayed:
Parameter
Port
State
Connection
Reason
®
DGS-3400 Series Layer 2 Gigabit Ethernet M anaged Sw itch
Figure 2 - 15 Port Error Disabled window
Description
Displays the port that has been error disabled.
Describes the current running state of the port, whether Enabled or Disabled.
This field will read the uplink status of the individual ports, whether Enabled or Disabled.
Describes the reason why the port has been error-disabled, such as a STP loopback
occurrence.
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