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Administering FDDI Ports 8-21
values so that you are only receiving alarms if your network is in poor
health. The SMT Standard recommended value is 8.
The lerAlarm value must be higher than the lerCutoff value so that the
network manager will be alerted to a problem before the PHY (port) is
actually removed from the network.
To set lerAlarm:
1 From the top level of the Administration Console, enter:
fddi port lerAlarm
You are prompted for a port number and an estimated link error rate at
which the link connection will generate an alarm.
2 Enter the port number.
3 Enter the estimated link error rate value.
Valid exponent values are -4 through -15. Even though these are negative
exponents, enter the value without the negative symbol. For example, to
express the value 1 x 10
-8
, enter 8 as the value.
Setting lerCutoff The lerCutoff attribute is the link error rate estimate at which a link
connection is disabled. Once the lerCutoff value is reached, the PHY that
detected a problem is disabled. The lerCutoff value is expressed as an
exponent (such as 1 x 10
-10
). A healthy network has an LER exponent
between 1 x 10
-10
and 1 x 10
-15
. You should set the lerCutoff below these
values so that a port will only be removed 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 will be alerted to a problem before the PHY (port) is
actually removed from the network.
Top-Level Menu
system
ethernet
➧fddi
bridge
ip
snmp
analyzer
script
logout
station
path
mac
➧port
display
➧lerAlarm
lerCutoff
label
path