3.5.4 Port Configuration
This screen is for the configuration of the electrical Ethernet port (TP) and the optical port (FX).
Both the TP and FX Port Active are enabled by default. If a port is disabled, all transmission through this port will be stopped. The
1000M’s LAN or Fiber Link LED will be extinguished if the port is made inactive. However, any connected device will still detect an Ethernet
link.
The UTP port Mode supports auto-negotiation per IEEE802.3u as well as manual forced mode setting of Speed (10/100/1000) and
Duplex (Half/Full). In 802.3u, speed can be auto detected, however the Duplex mode MUST be negotiated. When an 802.3u compliant device
is configured in auto negotiation mode, failure to negotiate Duplex (for example, if connected to legacy equipment or to equipment configured
in forced mode) will result in the Auto device assuming a Half-Duplex operating mode. Do not connect forced Full mode Ethernet ports to an
auto device as this will result in a Duplex-Mismatch.
The FX port will be able to auto detect speed (100M or 1000M) although there is no standard for fiber speed and duplex negotiation.
Therefore, it is important that at least one device on the fiber link be manually configured for speed. In the example here, the device is
manually configured for fiber speed of 100M.
Ethernet Flow Control (IEEE802.3X) is a mechanism for temporarily stopping the transmission of data on Ethernet family computer
networks. It can work in conjunction with rate limiting to avoid dropped packets from TCP. Flow control should also be used with care and with
full knowledge of its effect when used to pause traffic coming from a switch.
The rate limiting is adjustable for both ingress (packets received into the TP or FX port) and egress (packets transmitted from the TP or
FX port) in granularity of 64k. By default, rate limiting is disabled. Once enabled, the rate limit can be set in nx64k rates where n=1 to 16000.
Entering an “n” value of zero (0) will again disable the rate limiting.
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