Allied Telesis AT-S94 - Manual (Page 143)

Configuring Spanning Tree
Configuring Multiple Spanning Tree
Page 143
Configuring Multiple Spanning Tree
Multiple Spanning Tree Protocol (MSTP) provides differing load balancing scenarios. For example, while port A is
blocked in one STP instance, the same port can be placed in the Forwarding state in another STP instance.
This section contains the following topics:
• Defining MSTP Properties
• Defining MSTP Interfaces
• Defining MSTP Instance Mappings
• Defining MSTP Instance Settings
Defining MSTP Properties
The MSTP Page contains information for defining global MSTP settings, including region names, MSTP revisions,
and maximum hops.
To define MSTP:
1. Click Layer 2 > MSTP. The MSTP Page opens:
Figure 94: MSTP Page
The MSTP Page contains the following fields:
• Region Name — User-defined STP region name.
• Revision — An unsigned 16-bit number that identifies the revision of the current MSTP configuration. The
revision number is required as part of the MSTP configuration. The possible field range is 0-65535.
• Max Hops — Specifies the total number of hops that occur in a specific region before the BPDU is discarded.
Once the BPDU is discarded, the port information is aged out. The possible field range is 1-40. The field
default is 20 hops.