Zuld Commands - ZyXEL Communications XS3800-28 Cli Reference Manual

Use these commands to configure ZULD on the Switch.
104.1 ZULD Overview
A unidirectional link is a connection where the link is up on both ends, but only one end can receive
packets. This may happen if OAM was initially enabled but then disabled, there are misconfigured
transmitting or receiving lines or the hardware is malfunctioning. Zyxel Unidirectional Link Detection
(ZULD) is a layer-2 protocol that can detect and disable these physical one-way links before they cause
loops or communication malfunction.
ZULD must be enabled on the Switch and the port(s) in order to detect unidirectional links by monitoring
OAMPDUs.
Note: Ports advertise their unidirectional link detection capability using OAMPDUs, so all
connected devices must support OAM as well as ZULD.
Note: OAM must be enabled on other connected devices too. If OAM is not enabled initially,
ZULD will not work.
104.2 Command Summary
The following section lists the commands for this feature.
Table 229 zuld Command Summary
COMMAND
zuld
no zuld
interface port-channel <port-
list>
zuld
no zuld
zuld mode
<normal|aggressive>
C

ZULD Commands

DESCRIPTION
Enables ZULD on the Switch.
Disables ZULD on the Switch.
Enters config-interface mode for the specified port(s).
Enables ZULD on the specified port(s).
Disables ZULD on the specified port(s).
Configures the ZULD mode.
normal: ZULD only sends a syslog and trap when it detects
a unidirectional link.
aggressive: ZULD shuts down the port (puts it into an
ErrDisable state) as well as sends a syslog and trap when it
detects a unidirectional link.
Ethernet Switch CLI Reference Guide
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H A P T E R
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C 13
C 13
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C 13