Supermicro SSE-G2252, User Manual

Page: 508 / 1401

Chapter 14: Basic Administration Protocols
UDLD Configuration
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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 14-98: Configuring UDLD Protocol Intervals
C
ONFIGURING
UDLD
I
NTERFACE
S
ETTINGS
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.
P
ARAMETERS
These parameters are displayed:
• Port – Port identifier. (Range: 1-52)
• UDLD – Enables UDLD on a port. (Default: Disabled)
• 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.
• 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 ends without the proper echo information being
received, the link is considered to be unidirectional.