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Field Description
Bridge Maximum
Age
Configurable field; the maximum permissible age, in
seconds, provided by the current root bridge for
Spanning Tree configuration information to remain
active on the selected bridge.
When the time-span expires and the bridge has not
received any BPDUs, it discards the current Spanning
Tree information and initiates a new round of Span-
ning Tree configuration.
The recommended IEEE 802.1d time is 20s (twenty
seconds).
Bridge Hello Time Configurable field; the amount of time, in seconds,
provided by the current root bridge between trans-
missions of configuration BPDUs. This timer works
with the Spanning Tree Hold Time, which should be
greater than the Hello Time.
If it is smaller, the Spanning Tree algorithm responds
more quickly to configuration changes, resulting in
increased network traffic.
The recommended IEEE 802.1d time is 2s (two sec-
onds).
Bridge Forward
Delay
Configurable field; the delay time, in seconds, pro-
vided by the current root bridge before a bridge starts
forwarding data packets.
The recommended IEEE 802.1d time is 15s (15 sec-
onds).
Time Since Topol-
ogy Change
Read-only field; displays the length of time since the
topology was changed.
Number Topology
Changes
Read-only field; displays the number of topology
changes that have occurred.
Book Page 25 Thursday, September 18, 1997 4:28 PM