Chapter 40 ZULD
GS2220 Series User’s Guide
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40.3 ZULD C o nfig ura tio n
Use this screen to enable ZULD on a port, configure a mode and set the probe time. To open this screen,
click Adva nc e d Applic a tio n > ZULD > Co nfig ura tio n.
Fig ure 269 Advanced Application > ZULD > Configuration
Mode This field indicates what ZULD will do when a unidirectional link is detected. In No rm a l
mode, ZULD only sends a syslog and trap when it detects a unidirectional link. In
Ag g re ssive mode, ZULD shuts down the port (puts it into an ErrDisa b le state) as well as
sends a syslog and trap when it detects a unidirectional link.
Probe Time Probe time is the length of time that ZULD waits before declaring that a link is
unidirectional. When the probe time expires, and one port (either on the Switch or the
connected device) still has not received an OAMPDU, then ZULD declares that the link is
unidirectional.
Link State This field shows the following link states:
• Linkdo wn: This is an initialization state, where the port is not yet up.
• Pro be : This indicates that ZULD is discovering the connected device on this link.
• Bidire c tio na l: Traffic sent by the Switch is received by the connected device on this
link, and traffic from the connected device on this link is received by the Switch.
• Unidire c tio na l: The state of the link between the port and its connected port cannot
be determined either because no ZULD message was received, or one port is not
capable of sending traffic.
• Shutdown: The port has been shut down because its link with the connected device is
unidirectional and ZULD is in Ag g re ssive mode.
Remote Operation This field displays whether ZULD is enabled or disabled on the connected device on this
link. ZULD must be enabled on the connected device and on the port that is connecting
to the Switch.
Remote MAC Addr This is the MAC address of the port on the connected device to which the port of the
Switch is connected.
Remote Port This is the port number of the port on the connected device to which the port of the Switch
is connected.
Table 182 Advanced Application > ZULD Status (continued)
LABEL DESC RIPTIO N
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