
Configuring Line Services
3-16 114078 Rev. A
To edit the path attributes for an FDDI line:
1. Click on Expert at the Edit FDDI Parameters window.
The FDDI Advanced Attributes window appears (see
Figure 3-4).
2. Click on Path Attributes.
The FDDI Path Attributes window appears.
Specifying the Requested TTRT
The Requested TTRT value must be
• Greater than the minimum Valid Transmission Time (TVX), specified with
the TVX Lower Bound parameter
• Less than or equal to the maximum TTRT (T_Max Lower Bound parameter).
Refer to
Figure 3-7 for the valid range of values for Requested TTRT, in relation
to the other TTRT parameters.
Specifying the Minimum Valid Transmission Time
The minimum TVX must be
• Greater than zero
• Less than the Requested TTRT value
By default, the minimum TVX is 2.5 ms. Refer to
Figure 3-7 for the range of
values for TVX Lower Bound, in relation to the other TTRT parameters.
Caution: Be extremely careful when editing FDDI path parameters such as
Requested TTRT. You should change the default values only if the network is
part of a production or other specialized environment that requires
customizing the parameters.
Site Manager: Requested TTRT (ms) parameter: page A-10
Site Manager: Tvx Lower Bound (ms) parameter: page A-9
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