Tp-Link T1600G-28PS (TL-SG2424P) [228/754] Mstp concepts

Tp-Link T1600G-28PS (TL-SG2424P) [228/754] Mstp concepts
Configuration Guide 206
Configuring Spanning Tree Spanning Tree
receives this BPDU, it increments the path cost of its local incoming port. Then it forwards this
BPDU to the downstream switch, with the updated root path cost. The value of the accumulated
root path cost increases as the BPDU propagates further.
BPDU
The packets used to generate the spanning tree. The BPDUs (Bridge Protocol Data Unit) contain
a lot of information, like bridge ID, root path cost, port priority and so on. Switches share these
information to help determine the tree topology.
1.2.2 MSTP Concepts
MSTP, compatible with STP and RSTP, has the same basic elements used in STP and RSTP. Based
on the networking topology, this section will introduce some concepts only exist in MSTP.
Figure 1-3 MSTP Topology
region 1
region 3
region 4
CST
IST
Blocked Port
region 2
MST Region
An MST region consists of multiple interconnected switches. The switches that have the following
characteristics are considered as in the same region:

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