Extreme Networks ExtremeWare 7.7, Справочник по командам

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1580 ExtremeWare 7.7 Command Reference Guide
STP Commands
configure mstp region
configure mstp region <region name>
Description
Configures an MSTP region name on the switch.
Syntax Description
Default
When you create an MSTP region, it has the following default parameters:
• MSTP format Identifier—0
• MSTP Revision Level—3
Usage Guidelines
The maximum length for a name is 32 characters. Names can contain alphanumeric characters and
underscores ( _ ) but cannot be any reserved keywords, for example, mstp.
By default, the switch uses the MAC address of each member switch in addition to the region name to
generate an MSTP region.
For a switch to be part of an MSTP region, you must configure each switch in the region with the same
MSTP configuration attributes, also known as MSTP region identifiers. These identifiers consist of the
following:
• Region Name—The name of the MSTP region.
• Format Selector—The number used to identify the format of MSTP BPDUs. The default is 0.
• Revision Level—This identifier is reserved for future use; however, the switch uses and displays a
default of 3.
You can configure only one MSTP region on the switch at any given time.
The switches inside a region exchange BPDUs that contain information for MSTIs. The switches
connected outside of the region exchange CIST information. By having devices look at the region
identifiers, MSTP discovers the logical boundary of a region.
If you want to rename an active MSTP region, you must disable all active STPDs in the region before
renaming the region on all of the participating switches.
Viewing MSTP Information.
To view the MSTP configuration on the switch, use the show stpd
command. Output from this command contains global MSTP settings, including the name of the MSTP
region, the number or tag that identifies all of the BPDUs sent in the MSTP region, and the reserved
MSTP revision level. If configured, the output also displays the name of the Common Instance
Spanning Tree (CIST), and the number of Multiple Spanning Tree Instances (MSTIs).
region name Specifies an MSTP region name on the switch. This can be an ASCII character string up to
32 characters long.