
Customizing LAN Interfaces
114078 Rev. A 3-17
Specifying the Maximum TTRT
The Maximum TTRT value must be
• Greater than or equal to 10 ms
• Greater than or equal to the value of the Requested TTRT parameter
• Less than or equal to 1336.9344 ms
Refer to
Figure 3-7 for the range of values for T_Max Lower Bound, in relation to
the other TTRT parameters.
Editing FDDI Port Attributes
To edit the port attributes for an FDDI line:
1. Click on Expert at the Edit FDDI Parameters window.
The FDDI Advanced Attributes window appears (refer to
Figure 3-4).
2. Click on Port Attributes.
The FDDI Port Attributes window appears.
Specifying the LER Cutoff
The LER is an estimate at which a link connection is broken. The LER cutoff
ranges from 10
-4
to 10
-15
and is reported as the absolute value of the base 10
logarithm. By default, the LER cutoff is 10
-7
.
You can set the LER cutoff for an interface.
Specifying the Link Error Rate Alarm
The LER alarm rate is an estimate at which a link connection generates an alarm.
The LER alarm ranges from 10
-4
to 10
-15
and is reported as the absolute value of
the base 10 logarithm of the estimate. By default, the LER alarm is 10
-8
.
Site Manager: T_Max Lower Bound (ms) parameter: page A-10
Site Manager: LER Cutoff parameter: page A-11
Site Manager: LER Alarm parameter: page A-11
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