Nortel business policy switch 2000, User Manual

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Chapter 3 Using the console interface 255
Using the Business Policy Switch 2000 Version 2.0
Table 46 describes the Spanning Tree Port Configuration screen fields.
Note: Because multiple STGs are available only in Pure BPS 2000
Stack mode, STP Group does not appear when you work in Hybrid
Stack, or mixed stack, mode.
Table 46 Spanning Tree Port Configuration screen fields
Field Description
STP Group The field allows you to select the number of the spanning tree group (STG) you want to
view. To view another STG, type that STG ID number and press [Enter], or press the
spacebar on your keyboard to to toggle the STP Group numbers.
Default Value 1
Range 1 to 8; only created STP Groups display
Unit This field only appears if the switch is participating in a stack configuration. The field
allows you to select the number of the unit you want to view. To view another unit, type its
unit number and press [Enter], or press the spacebar on your keyboard to toggle the unit
numbers.
Port Indicates the switch port numbers that correspond to the field values in that row of the
screen (for example, the field values in row 2 apply to switch port 2). Note that the values
in the
Switch row affect all switch ports and, when the switch is part of a stack, the values
in the Stack row affect all ports in the entire stack.
Trunk The read-only data displayed in this column indicates the trunks that correspond to the
switch ports specified in the Trunk Members fields of the Trunk Configuration screen
(see
“MultiLink Trunk Configuration Menu screen” on page 215 ).
Participation Allows you to configure any (or all) of the switch ports for spanning tree participation.
When an individual port is a trunk member (see Trunk field), changing this setting for one
of the trunk members changes the setting for all members of that trunk. You should
consider how this can change your network topology before you change this setting (see
Chapters 1 and 2).
The Fast Learning parameter is the same as Normal Learning, except that the state
transition timer is shortened to 2 seconds.
Default Value Normal Learning
Range Normal Learning, Fast Learning, Disabled
Priority This read-only field is a bridge spanning tree parameter that prioritizes the lowest path
cost to the root. When one or more ports have the same path cost, spanning tree selects
the path with the highest priority (lowest numerical value). See also Path Cost.
Default Value 128
Range 0 to 255