C
HAPTER
32
| Spanning Tree Commands
– 799 –
spanning-tree
max-age
This command configures the spanning tree bridge maximum age globally
for this switch. Use the no form to restore the default.
SYNTAX
spanning-tree max-age seconds
no spanning-tree max-age
seconds - Time in seconds. (Range: 6-40 seconds)
The minimum value is the higher of 6 or [2 x (hello-time + 1)].
The maximum value is the lower of 40 or [2 x (forward-time - 1)].
DEFAULT SETTING
20 seconds
COMMAND MODE
Global Configuration
COMMAND USAGE
This command sets the maximum time (in seconds) a device can wait
without receiving a configuration message before attempting to
reconverge. All device ports (except for designated ports) should receive
configuration messages at regular intervals. Any port that ages out STA
information (provided in the last configuration message) becomes the
designated port for the attached LAN. If it is a root port, a new root port is
selected from among the device ports attached to the network.
EXAMPLE
Console(config)#spanning-tree max-age 40
Console(config)#
RELATED COMMANDS
spanning-tree forward-time (797)
spanning-tree hello-time (798)
spanning-tree mode This command selects the spanning tree mode for this switch. Use the no
form to restore the default.
SYNTAX
spanning-tree mode {stp | rstp | mstp}
no spanning-tree mode
stp - Spanning Tree Protocol (IEEE 802.1D)
rstp - Rapid Spanning Tree Protocol (IEEE 802.1w)
mstp - Multiple Spanning Tree (IEEE 802.1s)
DEFAULT SETTING
rstp
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