Supermicro MicroBlade MBM-GEM-004, Руководство пользователя для веб

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Release: 1.0
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MBM-GEM-004 Switch Web User Guide
4.7.6 MSTP Timers
The timers are configurable for maximum hop count, forward delay, maximum age, transmit hold
age and hello time.
Maximum Hop Count – MSTP uses a hop count to decide the validity of the BPDU messages.
The root switch sends a BPDU with a hops count as the max hops. Every switch decrements the
hops count while forwarding the BPDU. When this hops count reaches zero, the switch discards
the BPDU message. The allowed value ranges from 6 to 40. The default value is 20.
Max Age – Switches maintain the BPDU information for every port for a maximum age period. If
BPDU configuration messages are not received on any ports within the max age time, the switch
will reconfigure those ports. The allowed value ranges from 6 to 40. The default value is 20.
Forward Delay – A switch will wait for the of forwarding time interval on listening and learning
states before going to aforwarding state.The allowed value ranges from 4 to 30. The default value
is 15.
Transmit Hold Count – Transmit hold count helps to control the BPDU burst traffic.The allowed
value ranges from 1 to 10. The default value is 3.
Hello Time - The root switch periodically sends the BPDU messages on every port for every hello
time interval. The allowed value is 1 or 2 seconds. The default value is 2 seconds.
Fig: MSTP Timers