Cisco Nexus 5000 Series Command Reference Release 4.0(1a)N2(1) (OL-16599-01, March 2009)

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Cisco Nexus 5000 Series Command Reference
OL-16599-01
Chapter 2 Ethernet Commands
spanning-tree vlan
spanning-tree vlan
To configure Spanning Tree Protocol (STP) parameters on a per-VLAN basis, use the spanning-tree
vlan command. To return to the default settings, use the no form of this command.
spanning-tree vlan vlan-id [forward-time value | hello-time value | max-age value | priority value
| [root {primary | secondary} [diameter dia [hello-time value]]]]
no spanning-tree vlan vlan-id [forward-time | hello-time | max-age | priority | root]
Syntax Description
Command Default The defaults are as follows:
• forward-time—15 seconds
• hello-time—2 seconds
• max-age—20 seconds
• priority—32768
Command Modes Configuration mode
Command History
vlan-id VLAN identification number; the range of valid values is from 0 to 4094.
forward-time value (Optional) Specifies the STP forward-delay time; the range of valid values is
from 4 to 30 seconds.
hello-time value (Optional) Specifies the number of seconds between the generation of
configuration messages by the root switch; the range of valid values is from
1 to 10 seconds.
max-age value (Optional) Specifies the maximum number of seconds that the information
in a bridge protocol data unit (BPDU) is valid; the range of valid values is
from 6 to 40 seconds.
priority value (Optional) Specifies the STP-bridge priority; the valid values are 0, 4096,
8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056,
49152, 53248, 57344, or 61440. All other values are rejected.
root primary (Optional) Forces this switch to be the root bridge.
root secondary (Optional) Forces this switch to be the root switch if the primary root fails.
diameter dia (Optional) Specifies the maximum number of bridges between any two
points of attachment between end stations.
Release Modification
4.0(0)N1(1a) This command was introduced.