Installation manual

Operation Manual - STP
Quidway S3000-EI Series Ethernet Switches Chapter 1
MSTP Region-configuration
Huawei Technologies Proprietary
1-5
Switch A
AP2AP1
CP1
BP1
Switch C
Swi h B
tc
CP2
BP2
LAN
Figure 1-3 Designated switch and designated p
For a switch, the designated switch is a switch in
local switch via a port called the designated port a
switch is a switch that in charge of forwarding pa
called the designated port accordingly.
forwards data to Switch B via the port AP1.
Switch A and the designated port is AP1. Also in th
C are connected to the LAN and Switch B forw
switch of LAN is Switch B and the designated po
ort
charge of forwarding packets to the
ccordingly. For a LAN, the designated
ckets to the network segment via a port
As illustrated in the Figure 1-3, Switch A
So to Switch B, the designated switch is
e figure above, Switch B and Switch
ards packets to LAN. So the designated
rt is BP2.
 Note:
AP1, AP2, BP1, BP2, CP1 and CP2 respectively delegate the ports of Switch A, Switch
B and Switch C.
z The specific calculation process of STP algorithm.
The following example illustrates the calculation process of STP.
The
Figure 1-4 below illustrates the network.