FoxGate S6424-S2C2 series User Manual

STP Configuration
145
Figure 21-2 Network diagram for the STP algorithm
 Initial state of each device
The following table shows the initial state of each device.
Table 21-3 Initial state of each device
Device
Port name
BPDU of port
Device A
AP1
{0, 0, 0, AP1}
AP2
{0, 0, 0, AP2}
Device B
BP1
{1, 0, 1, BP1}
BP2
{1, 0, 1, BP2}
Device C
CP1
{2, 0, 2, CP1}
CP2
{2, 0, 2, CP2}
1) Comparison process and result on each device
The following table shows the comparison process and result on each device.
Table 21-4 Comparison process and result on each device
Device
Comparison process
BPDU of port
after comparison
Device A
Port AP1 receives the configuration BPDU of Device B {1, 0, 1,
BP1}. Device A finds that the configuration BPDU of the local port
{0, 0, 0, AP1} is superior to the configuration received message,
and discards the received configuration BPDU.
Port AP2 receives the configuration BPDU of Device C {2, 0, 2,
CP1}. Device A finds that the BPDU of the local port {0, 0, 0, AP2}
is superior to the received configuration BPDU, and discards the
received configuration BPDU.
Device A finds that both the root bridge and designated bridge in
the configuration BPDUs of all its ports are Device A itself, so it
assumes itself to be the root bridge. In this case, it does not make
any change to the configuration BPDU of each port, and starts
sending out configuration BPDUs periodically.
AP1: {0, 0, 0, AP1}
AP2: {0, 0, 0, AP2}

FoxGate S6424-S2C2 series Specifications

General

Brand	FoxGate
Model	S6424-S2C2 series
Category	Switch
Language	English