Figure 8-4 Mapping Table Of The Msti, Ist And Vlan - Huawei Quidway S9300 Configuration Manual

Quidway S9300 Terabit Routing Switch
Configuration Guide - Ethernet
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Figure 8-4 Mapping table of the MSTI, IST and VLAN

S9300B
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Issue 03 (2009-08-20)
CST
The common spanning tree (CST) is a single spanning tree that connects all MST regions
on a switching network. If each MST region is considered as a switch, the CST is a spanning
tree generated by STP and RSTP calculation. In
CST.
S9300A
D0
S9300D
VLAN mapping table
The VLAN mapping table is an attribute of an MST region. It describes the mapping
between a VLAN and an MSTI. In
D0 shows that VLAN 1 maps to MSTI2, VLAN 2 and VLAN 3 map to MSTI0.
CIST
The common and internal spanning tree (CIST) is a single spanning tree calculated by STP
and RSTP and connects all switches on a switching network.
IST
An MST region has an internal spanning tree (IST), which is a fragment of the CIST in the
MST region. The IST is also called MSTI0. In
all MST regions and the CST form a complete spanning tree, that is, the CIST.
Regional root
Regional roots are classified into IST regional roots and MSTI regional roots. A CIST
regional root is the root of the IST, and an MSTI regional root is the root of an MSTI.
CIST root
The CIST root is the root switch of the CIST.
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Figure
AP1
S9300C
VLAN1
VLAN2,VLAN3
other VLANs
Figure 8-4, the VLAN mapping table of MST region
Figure
8 MSTP Configuration
8-3, the dotted line indicates the
MSTI1
root switch: S9300C
MSTI2
root switch: S9300B
MSTI0 ( IST)
root switch: S9300A
MSTI1
MSTI2
MSTI0
8-4, MSTI0 is the IST. The ISTs of
8-5