Transition Networks
S4224 Web User Guide
33558 Rev. C
Page 380 of 669
UDLD Configuration
The UDLD Port Configuration page lets you view and configure the current UDLD (Uni Directional Link
Detection) from the
Configuration
>
UDLD
menu path.
The UDLD protocol monitors the physical configuration of the links between devices and ports that
support UDLD. It detects the existence of unidirectional links. UDLD is used to provide mechanisms
useful for detecting one way connections before they create a loop or other protocol malfunction.
specifies a way at the Data link layer to detect a Uni-directional link.
Port
The Port number configured by this row.
UDLD mode
Configures the UDLD mode on a port. Valid values are Disable, Normal and Aggressive. The
default mode is
Disabled
.
Disable
: In disabled mode, UDLD functionality doesn't exists on port.
Normal
: In normal mode, if the link state of the port was determined to be uni-directional, it will
not affect the port state.
Aggressive
: In aggressive mode, Uni-directional detected ports will get shutdown. To bring back
the ports up, you must disable UDLD on that port.
Message Interval
Configures the period of time between UDLD probe messages on ports that are in the
advertisement phase and are determined to be bidirectional. The range is from
7
to
90
seconds.
(The default value is
7
seconds; currently the default time interval is supported due to lack of
detailed information in RFC 5171).