H3C Technologies H3C S7500E Series Switches - Manual (Page 158)

13-6
Figure 13-2 Network diagram for the STP algorithm
AP1 AP2
Device A
With priority 0
Device B
With priority 1
Device C
With priority 2
BP1
BP2
CP1
CP2
5
10
4
Initial state of each device
Table 13-4 shows the initial state of each device.
Table 13-4 Initial state of each device
Device Port name BPDU of port
AP1 {0, 0, 0, AP1}
Device A
AP2 {0, 0, 0, AP2}
BP1 {1, 0, 1, BP1}
Device B
BP2 {1, 0, 1, BP2}
CP1 {2, 0, 2, CP1}
Device C
CP2 {2, 0, 2, CP2}
Comparison process and result on each device
Table 13-5 shows the comparison process and result on each device.