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26.14
spanning-tree timer
Description
The spanning-tree timer command is used to configure forward-time,
hello-time and max-age of Spanning Tree. To return to the default
configurations, please use no spanning-tree timer command.
Syntax
spanning-tree timer {[ forward-time
[ max-age
no spanning-tree timer
Parameter
forward-time
state after the network topology is changed. Forward Delay ranges from 4 to
30 in seconds and it is 15 by default. Otherwise, 2 * (Forward Delay - 1) >=
Max Age.
hello-time
used to test the links. Hello Time ranges from 1 to 10 in seconds and it is 2 by
default. Otherwise, 2 * (Hello Time + 1) <= Max Age.
max-age
BPDU before attempting to reconfigure, ranging from 6 to 40 in seconds. By
default, it is 20.
Command Mode
Global Configuration Mode
Privilege Requirement
Only Admin, Operator and Power User level users have access to these
commands.
Example
Configure forward-time, hello-time and max-age for Spanning Tree as 16
seconds, 3 seconds and 22 seconds respectively:
T1600G-52TS(config)# spanning-tree timer forward-time 16 hello-time 3
max-age 22
max-age
]}
—— Forward Delay, which is the time for the port to transit its
——Hello Time, which is the interval to send BPDU packets, and
—— The maximum time the switch can wait without receiving a
forward-time
219
hello-time
] [ hello-time
]
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