ZyXEL Communications XGS2220 Series, Руководство пользователя

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Chapter 39 ZULD
XGS2220 Series User’s Guide
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devices too. If OAM is not enabled initially, ZULD will not work.
• If OAM is enabled initially and later disabled on one end of a link, the link will be unidirectional as that
end cannot send OAMPDUs.
• OAM discovery, the sending of OAMPDUs to other ports, is initiated by an active port.
• When
ZULD detects a unidirectional link, it sends a syslog and SNMP trap and may shut down the
affected port ( Aggressive Mode ).
• If a port on the Switch is shut down by ZULD , and you want to recover it, then do one of the following:
• Go to PORT > Port Setup . Clear Active and click Apply . Then select Active and click Apply again.
• Go to SECURITY > Errdisable > Errdisable Recovery and set the interval for ZULD . After the interval
expires, the closed ports will become active and start receiving packets again.
• Use the command
port no inactive
.
• Refer to the ZULD logs to see when a unidirectional link is detected and when it is recovered to a
bidirectional link.
39.2 ZULD Status
Use this screen to see details of unidirectional and bidirectional links discovered by ZULD . To open this
screen, click PORT > ZULD > ZULD Status .
Figure 189 PORT > ZULD > ZULD Status
The following table describes the fields in the above screen.
Table 130 PORT > ZULD > ZULD Status
LABEL DESCRIPTION
ZULD is.... This shows whether ZULD is enabled or disabled on the Switch.
Port This field displays the port number.
Active This field displays whether ZULD is enabled on the port or not. ZULD must be enabled to
detect an unidirectional link by monitoring OAMPDUs.