Chapter 13
| Basic Administration Protocols
UDLD Configuration
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Web Interface
To configure the UDLD message probe interval, detection interval, and recovery
interval:
1. Click Administration, UDLD, Configure Global.
2. Select Configure Global from the Step list.
3. Configure the message and detection intervals.
4. Enable automatic recovery if required, and set the recovery interval.
5. Click Apply.
Figure 333: Configuring UDLD Protocol Intervals
Configuring UDLD
Interface Settings
Use the Administration > UDLD (Configure Interface) page to enable UDLD and
aggressive mode which reduces the shut-down delay after loss of bidirectional
connectivity is detected.
Parameters
These parameters are displayed:
◆ Port – Port identifier. (Range: 1-28/52)
◆ UDLD – Enables UDLD on a port. (Default: Disabled)
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UDLD requires that all the devices connected to the same LAN segment be
running the protocol in order for a potential mis-configuration to be
detected and for prompt corrective action to be taken.
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Whenever a UDLD device learns about a new neighbor or receives a
resynchronization request from an out-of-synch neighbor, it (re)starts the
detection process on its side of the connection and sends N echo messages
in reply. (This mechanism implicitly assumes that N packets are sufficient to
get through a link and reach the other end, even though some of them
might get dropped during the transmission.)
Since this behavior must be the same on all the neighbors, the sender of
the echoes expects to receive an echo in reply. If the detection process
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