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DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch CLI Manual
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D-L
INK
U
NIDIRECTIONAL
L
INK
D
ETECTION
(DULD)
C
OMMANDS
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-3450:admin# config duld ports 1 state enable
Commands: config duld ports 1 state enable
Success
DGS-3450:admin#
show duld
Purpose
Used to show unidirectional link detection information
Syntax
show duld ports {<portlist>}
Description
The command used to show ports unidirectional link information including:
Admin state:
port’s unidirectional link detection configuration state.
Discovery Time:
the neighbor discovery timer.
Link Status:
port’s link detection result. It maybe
