Figure 7-5 MSTI
Root
VLAN
10&20&30
V
L
A
N
1
0
&
2
0
VLAN 20&30
VLAN
10&30
V
L
A
N
3
0
VLAN
10&30
V
L
A
N
2
0
VLAN 10
MST Region
Root
MSTI
corresponding to
VLAN 10
Root
MSTI
corresponding to
VLAN 20
MSTI
corresponding to
VLAN 30
MSTI links
MSTI links blocked by the protocol
MSTIs are independent of each other. an MSTI can correspond to one or more VLANs, but a
VLAN can be mapped to only one MSTI.
Master Bridge
The master bridge is the IST master, which is the switching device closest to the CIST root in a
region, for example, S1 shown in Figure 7-4.
If the CIST root is in an MST region, the CIST root is the master bridge of the region.
Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Ethernet Switching
7 MSTP Configuration
Issue 01 (2014-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
228
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