16. Ethernet Ports
ROX™ v2.2 User Guide 154 RuggedBackbone™ RX5000
• Transmitting FEFI – transmits a modified link integrity signal when a link failure is detected (that is,
when no link signal is received from the link partner).
• Detecting FEFI – indicates link loss when a FEFI signal is received from the link partner.
• 10Base-FL links – no standard support.
10Base-FL links have no native link partner notification mechanism. Also, FEFI support in 100Base-
FX links is optional according to the IEEE 802.3 standard, which means that some link partners may
not support it.
RuggedCom offers an advanced Link-Fault-Indication (LFI) feature for the links where no native link
partner notification mechanism is available. With LFI enabled, the device bases generation of a link
integrity signal upon its reception of a link signal. In Figure 16.1, “Controller Protection Through LFI”,
if Switch A fails to receive a link signal from the Controller, it will stop generating a link signal. The
Controller will detect the link failure and switch to the backup port.
If both link partners support LFI, LFI must not be enabled on both sides of the link. If
LFI is enabled on both sides, the link will never be established because each side will
permanently wait for its partner to transmit a link signal.
16.2. Ethernet Port Configuration
The Ethernet Ports menu is accessible from the main menu under interface.
Figure 16.2. Ethernet Ports menu
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