Motorola RFS Series, System Reference Manual

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Network Setup
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4.10.2 Viewing and Configuring Bridge Instance Details
The Bride Instance tab displays the number of MSTP instance created and VLANS associated with it. To
view and configure the MSTP bridge instance:
1. Select Network > Multiple Spanning Tree from the main menu tree.
Bridge Hello Time Displays the configured Hello Time. If this is the root bridge, the value is equal to
the configured Hello Time.
CIST Bridge Forward
Delay Enter the CIST bridge forward delay value received from the root bridge. If this is
the root bridge, the value will be equal to the Configured Forward Delay.
The forward delay value is the maximum time (in seconds) the root device waits
before changing states (from a listening state to a learning state to a forwarding
state).
This delay is required, as every device must receive information about topology
changes before forwarding frames.
In addition, each port needs time to listen for conflicting information that would
make it return to a blocking state; otherwise, temporary data loops may result.
CIST Bridge Forward
Delay Displays the configured forward delay period.
CIST Bridge Maximum
Age Enter the CIST bridge maximum age received from the root bridge. The max-age is
the maximum time (in seconds) for which (if a bridge is the root bridge) a message
is considered valid. This prevents the frames from looping indefinitely. The max-age
should be greater than twice the value of hello time plus one, but less than twice
the value of forward delay minus one. The allowable range for max-age is 6-40
seconds. Configure this value sufficiently high, so a frame generated by root can be
propagated to the leaf nodes without exceeding the max age.
Bridge Maximum Age Displays the BPDU maximum age value. If this is the root bridge, the value will be
equal to the Configured Max Age.