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Figure 3-4.2: The MSTI Configuration
Parameter description:
Configuration Identification
Configuration Name :
The name identifying the VLAN to MSTI mapping. Bridges must share the name
and revision (see below), as well as the VLAN-to-MSTI mapping configuration
in order to share spanning trees for MSTI's (Intra-region). The name is at most
32 characters.
Configuration Revision :
The revision of the MSTI configuration named above. This must be an integer
between 0 and 65535.
MSTI Mapping
MSTI :
The bridge instance. The CIST is not available for explicit mapping, because it
will receive the VLANs not explicitly mapped.
VLANs Mapped :
The list of VLANs mapped to the MSTI. The VLANs must be separated with
commas and/or spaces. A VLAN can only be mapped to one MSTI. An unused
MSTI should just be left empty (i.e., not having any VLANs).
Buttons
Save – Click to save changes.
Reset- Click to undo any changes made locally and revert to previously saved
values.
3-4.3 MSTI Priorities
You can implement a Spanning Tree protocol on the switch. The CIST is the default instance
that is always active. It controls the bridge priority. Lower numeric values have better priority.
The bridge priority plus the MSTI instance number, concatenated with the 6-byte MAC
address of the switch, forms a Bridge Identifier.
The section describes how to inspect the current STP MSTI bridge instance priority
configurations, and possibly change them as well.