Udld Overview - Dell PowerConnect B-FCXs Configuration Manual

Configuring Uni-Directional Link Detection (UDLD) and
Protected Link Groups
Table 66
features they support. These features are supported in the Layer 2, base Layer 3, edge Layer 3,
and full Layer 3 software images, except where explicitly noted.
TABLE 66
Feature
Uni-directional Link Detection (UDLD)
(Link keepalive)
UDLD on tagged ports
Protected link groups

UDLD overview

Uni-Directional Link Detection (UDLD) monitors a link between two Dell PowerConnect devices and
brings the ports on both ends of the link down if the link goes down at any point between the two
devices. This feature is useful for links that are individual ports and for trunk links.
shows an example.
FIGURE 77
Without link keepalive, the ports remain
enabled. Traffic continues to be load balanced to the
ports connected to the failed link.
When link keepalive is enabled, the feature
brings down the ports connected
to the failed link.
Switch
PowerConnect B-Series FCX Configuration Guide
53-1002266-01
lists the individual Dell PowerConnect switches and the UDLD and protected link group
Supported UDLD and protected link group features
UDLD example
PowerConnect B-Series FCX
Yes
Yes
Yes
X
Chapter
11
Figure 77
Switch
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