Spanning-Tree Vlan - Cisco 4500M Command Reference Manual

Chapter2 Cisco IOS Commands for the Catalyst 4500 Series Switches

spanning-tree vlan

To configure STP on a per-VLAN basis, use the spanning-tree vlan command. To return to the default
value, use the no form of this command.
Syntax Description
vlan_id
forward-time seconds
hello-time seconds
max-age seconds
priority priority
protocol protocol
root primary
root secondary
diameter net-diameter
Defaults
The default settings are as follows:
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•
•
•
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Command Modes
Global configuration
Command History Release
12.1(8a)EW
12.1(12c)EW
78-16201-01
spanning-tree vlan vlan_id [forward-time seconds | hello-time seconds | max-age seconds |
priority priority | protocol protocol | root {primary | secondary} [diameter net-diameter
[hello-time seconds]]]
no spanning-tree vlan vlan_id [forward-time | hello-time | max-age | priority | root]
VLAN identification number; valid values are from 1 to 4094.
(Optional) Sets the STP forward delay time; valid values are from 4 to 30
seconds.
(Optional) Specifies, in seconds, the time between configuration messages
generated by the root switch; valid values are from 1 to 10 seconds.
(Optional) Sets the maximum time, in seconds, that the information in a
BPDU is valid; valid values are from 6 to 40 seconds.
(Optional) Sets the STP bridge priority; valid values are from 0 to 65535.
(Optional) Specifies the protocol.
(Optional) Forces this switch to be the root bridge.
(Optional) Specifies this switch act as the root switch should the primary
root fail.
(Optional) Specifies the maximum number of bridges between two end
stations; valid values are from 2 to 7.
Forward-time—15 seconds
Hello-time—2 seconds
Max-age—20 seconds
Priority—32768 with STP enabled; 128 with MST enabled
Root—No STP root
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Support for extended addressing was added.
Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
spanning-tree vlan
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