Configure ULFD Basic Functions

Configuration Condition

Before configuring the ULFD basic functions, first complete the following task:

• Ensure that the ULFD detection port is connected normally

Enable global ULFD function

ULFD has two work modes, that is, normal and aggressive. For the two modes, the basis of judging the uni-directional link is different. The normal mode is often used to check the uni-direction caused by the crossover connection. The aggressive mode is used to check the uni-directional connection caused by the crossover connection or disconnection.

Table 2–2 Enable global ULFD function

Enable ULFD Function of Ethernet Interface

ULFD detection needs to enable the global ULFD detection function and the ULFD detection function of the Ethernet interface. If the ULFD function is not enabled globally, but just enabled on the Ethernet interface, the ULFD function cannot take effect.

If the global enabled ULFD detection mode and Ethernet interface enabled ULFD detection mode are inconsistent, the Ethernet interface ULFD detection mode takes effect first.

Table 2–3 Enable the ULFD function of the Ethernet interface

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  To switch over the ULFD work mode on the Ethernet interface, first cancel the previous work mode and then configure the new mode.
• When enabling the ULFD function on the Ethernet interface, ensure that the neighbor Ethernet interface is also configured with the ULFD function and works in the same detection mode.

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