Contemporary Control Systems Compact Managed Switches Software Manual for Web Browser - Manual (Page 15)

TD020851-0MG
15
4.3 Port Configuration and Port Statistics
To configure a port or view its statistics, go to the switch Home Page and click on the
image of the socket associated with the port of interest. Figure 11 shows the default
settings for port 1, as an example, with controls in the upper panel and typical traffic
statistics in the lower panel. The port number appears in the top centre of the screen.
4.3.1 Port Configuration
With the upper-panel controls, you can turn the port on or off (Port State), set its data
rate and duplicity (Mode), manage its Auto-MDIX function and enable or disable its Flow
Control. (Flow Control is explained in Section 4.4.7.1). The type of cabling which the
port supports is identified in the box to the right of the word Media Type.
NOTE: Some models include fibre optic cable ports. Such ports do NOT auto-negotiate. Their
only Mode option is Full or Half Duplex because their data rate is fixed at 100 Mbps.
Auto-Negotiation for Copper Ports
A single cable links two Ethernet devices. When these devices auto-negotiate, the data
rate will be 100 Mbps only if both are capable of that speed. Likewise, full-duplex will
only be selected if both can support it. If only one device supports auto-negotiation,
then it will match the data rate and duplex mode of the non-auto-negotiating device.
Sometimes it is advantageous to select a fixed data rate and duplicity setting on both
Ethernet devices to eliminate the auto-negotiation process.
Auto-MDIX
When interconnecting two switches,
crossover cables are traditionally
used — but if one switch uses
Auto-MDIX, the communication can
be via either crossover or straight-
through cable. This functionality
does not require both switches to
have Auto-MDIX.
Figure 11 —
Port Configuration
and Port Statistics
(Figure 11, upper panel)