D-Link DES-3028 User Manual - Port Error Disabled
DES-3028 DES-3028P DES-3052 DES-3052P Layer 2 Fast Ethernet Managed Switch
The following parameters can be configured:
Parameter Description
From…. To
Use the pull-down menus to select the port or range of ports to be configured.
State
Toggle this field to either enable or disable a given port or group of ports.
Speed/Duplex
Toggle the Speed/Duplex field to either select the speed and duplex/half-duplex state of the
port. Auto denotes auto-negotiation between 10 and 100 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. The other options are Auto,
10M/Half, 10M/Full, 100M/Half and 100M/Full, 1000M/Full_M and 1000M/Full_S. 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_M and
1000M/Full_S. Gigabit connections only support full duplex connections and take on certain
characteristics that are different from the other choices listed.
The 1000M/Full_M (master) and 1000M/Full_S (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 mastersetting (1000M/Full_M) will allow the port to advertise capabilities
related to duplex, speed and physical layer type. The mastersetting 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 masterphysical layer by a local source. The slavesetting (1000M/Full_S) uses loop
timing, where the timing comes form a data stream received from the master. If one connection
is set for 1000M/Full_M, the other side of the connection must be set for 1000M/Full_S. Any
other configuration will result in a link down status for both ports.
Flow Control
Displays the flow control scheme used for the various port configurations. Ports configured for
full-duplex use 802.3x flow control, half-duplex ports use backpressure flow control, and Auto
ports use an automatic selection of the two. The default is Disabled.
Medium Type
This applies only to the Combo ports. If configuring the Combo ports this defines the type of
transport medium used. SFP ports should be set at Fiber and the Combo 1000BASE-T ports
should be set at Copper.
Learning
When Enabled, destination and source MAC addresses are automatically listed in the forwarding
table. The default setting is Enabled and cannot be modified.
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 Port Configuration > Port Error Disabled.
Figure 6- 4. Port Error Disabled window
The following parameters are displayed:
Parameter Description
Port
Displays the port that has been error disabled.
State
Describes the current running state of the port, whether Enabled or Disabled.
Connection
This field will read the uplink status of the individual ports, whether enabled or Disabled.
Reason
Describes the reason why the port has been error-disabled, such as a STP loopback
occurrence.
Description
This field further describes the specifics of the action.
28