Instance vlan – Allied Telesis AT-DC2552XS User Manual
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Chapter 14: STP Commands
340
INSTANCE VLAN
Syntax
instance
mst-instance
vlan
vlan_ids
Parameters
mst-instance
Specifies the ID number of an MST instance. The range is from 1
to 15.
vlan_ids
Specifies a VLAN ID or multiple VLAN IDs. Use a comma (,) to
separate VLAN IDs and a hyphen (-) to indicate a range of VLAN
IDs.
Mode
MST Configuration mode
Description
Use this command to create an MST instance and associate it with one or
more VLANs. When specifying an existing MST instance, you can change
VLANs that you want to associate with the MST instance.
Note
This command is applicable only when MSTP is enabled.
The switch supports up to 15 MST instances. An instance can contain any
number of VLANs, but a VLAN can belong to only one MST instance at a
time.
After creating an MST instance and associating it with a VLAN, use the
SPANNING-TREE MST INSTANCE command to associate ports with
each instance. See “SPANNING-TREE MST INSTANCE” on page 372.
By default, all the VLANs on the switch are associated with CIST (with an
instance value of 0). This command removes the specified VLANs from
CIST and assigns them to the specified MST instance.
To remove a VLAN association from the MST instance, use the NO
INSTANCE VLAN command with the vlan_ids parameter. After the VLAN
is removed from the MST instance, the VLAN belongs to CIST (with an
instance value of 0) again. When you do not specify VLAN IDs, this
command deletes the specified MST instance from the switch.