Cisco ME 3600X User Manual

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Cisco ME 3800X and ME 3600X Switch Command Reference
OL-28238-01
Chapter
spanning-tree vlan
spanning-tree vlan
To configure spanning tree on a per-VLAN basis, use the spanning-tree vlan command in global
configuration mode. To return to the default setting, use the no form of this command.
spanning-tree vlan vlan-id [forward-time seconds | hello-time seconds | max-age seconds |
priority priority | root {primary | secondary} [diameter net-diameter
[hello-time seconds]]]
no spanning-tree vlan vlan-id [forward-time | hello-time | max-age | priority | root]
Syntax Description
Defaults Spanning tree is enabled on all VLANs.
The forward-delay time is 15 seconds.
The hello time is 2 seconds.
The max-age is 20 seconds.
The primary root switch priority is 24576.
The secondary root switch priority is 28672.
vlan-id VLAN range associated with a spanning-tree instance. You can specify a
single VLAN identified by VLAN ID number, a range of VLANs separated
by a hyphen, or a series of VLANs separated by a comma. The range is 1 to
4094.
forward-time seconds (Optional) Sets the forward-delay time for the specified spanning-tree
instance. The forwarding time specifies how long each of the listening and
learning states last before the interface begins forwarding. The range is 4 to
30 seconds.
hello-time seconds (Optional) Sets the interval between hello bridge protocol data units
(BPDUs) sent by the root switch configuration messages. The range is 1 to 10
seconds.
max-age seconds (Optional) Sets the interval between messages the spanning tree receives
from the root switch. If a switch does not receive a BPDU message from the
root switch within this interval, it recomputes the spanning-tree topology.
The range is 6 to 40 seconds.
priority priority (Optional) Sets the switch priority for the specified spanning-tree instance.
This setting affects the likelihood that this switch is selected as the root
switch. A lower value increases the probability that the switch is selected
as the root switch.
The range is 0 to 61440 in increments of 4096. Valid priority values are
4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960,
45056, 49152, 53248, 57344, and 61440. All other values are rejected.
root primary (Optional) Forces this switch to be the root switch.
root secondary (Optional) Sets this switch to be the root switch should the primary root
switch fail.
diameter net-diameter (Optional) Sets the maximum number of switches between any two end
stations. The range is 2 to 7.

Cisco ME 3600X Specifications

General

Brand	Cisco
Model	ME 3600X
Category	Switch
Language	English