Defining Multiple Spanning Tree - 3Com 3CRUS2475 User Manual

232 C 11: C
HAPTER ONFIGURING
Defining Multiple
Spanning Tree
S T
PANNING REE
Multiple Spanning Tree (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.
The Multiple STP Setup Page contains information for defining global
MSTP settings, including region names, MSTP revisions, and maximum
hops.
To configure Multiple STP:
1 Click Policy > Spanning Tree > Multiple STP > Setup. The Multiple STP
Setup Page opens:
Figure 119 Multiple STP Setup Page
The Multiple STP Setup 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.
IST Master — Identifies the Spanning Tree Master instance. The IST
■
Master is the specified instance root.