Unidirectional links can be detected only when the devices on both ends of optical fibers or copper twisted pairs support DLDP functions.
DLDP can be configured on Layer 2 and Layer 3 Ethernet interfaces. By default, an Ethernet interface works in Layer 2 mode. Before configuring DLDP on a Layer 3 Ethernet interface, switch the Ethernet interface to Layer 3 mode.
The system view is displayed.
DLDP is enabled globally.
By default, DLDP is disabled globally and on each interface.
The interface view is displayed.
DLDP cannot be configured on logical interfaces.
DLDP is enabled on the interfaces.