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DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch CLI Manual
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D-LINK UNIDIRECTIONAL LINK DETECTION (DULD)
COMMANDS
The unidirectional link detection referred in this document provides a mechanism that can be used to detect unidirectional
link for Ethernet switches. This function is established based on OAM, so OAM should be enabled before starting
detection.
The D-Link Unidirectional Link Detection (DULD) Resolver commands in the Command Line Interface (CLI) are listed
(along with the appropriate parameters) in the following table.
Command Parameters
config duld ports [<portlist> | all ] {state [enable |disable] | mode [shutdown | normal] |
discovery_time <sec 5-65535>}(1)
show duld ports {<portlist>}
Each command is listed, in detail, in the following sections.
config duld ports
Purpose Used to configure unidirectional link detection on port
Syntax
config duld ports [<portlist> | all ] {state [enable |disable] | mode [shutdown | normal] |
discovery_time <sec 5-65535>}(1)
Description The command used to configure unidirectional link detection on ports.
Unidirectional link detection provides discovery mechanism based on 802.3ah to discovery its
neighbor. If the OAM discovery can complete in configured discovery time, it concludes the
link is bidirectional. Otherwise, it starts detecting task to detect the link status.
Parameters
<portlist> - Specify a range of ports.
state - Specifies these ports unidirectional link detection status. The default state is disabled.
mode - See below:
shutdown - If any unidirectional link is detected, disable the port and log an event.
normal - Only log an event when a unidirectional link is detected.
discovery_time - Specifies these ports neighbor discovery time. If the discovery is timeout,
the unidirectional link detection will start. The default discovery time is 5 seconds.
Restrictions Only Administrator and Operator-level users can issue this command.
Example usage:
To enable unidirectional link detection on port 1:
DGS-3627:admin# config duld ports 1 state enable
Commands: config duld ports 1 state enable
Success
DGS-3627:admin#