Setting Lercutoff; Setting Port Labels - 3Com corebuilder 3500 Implementation Manual

108 C 6: F
HAPTER IBER

Setting lerCutoff

Setting Port Labels

D D I
ISTRIBUTED ATA NTERFACE
The lerCutoff attribute is the link error rate estimate at which a link
connection is disabled. When the lerCutoff value is reached, the PHY that
detected a problem is disabled.
Effects and Consequences
When you set the lerCutoff attribute, consider the following:
The lerCutoff value is expressed as an exponent (such as 1 x 10
A healthy network has an LER exponent between 1 x 10
1 x 10 -15 .
Set the lerCutoff below these values so that a port is only removed
only as a last resort. The SMT Standard recommended value is 7.
The lerCutoff value must be lower than the lerAlarm value so that the
network manager software is alerted to a problem before the PHY
(port) is actually removed from the network.
Port labels serve as useful reference points and as an accurate means of
identifying your ports for management. Label your FDDI ports for easy
identification of the devices attached to them (for example, workstation,
server, FDDI backbone).
(FDDI)
-10
).
-10 and