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BPDU Protect: BPDU Protect is to prevent the edge port from being attacked by
maliciously created BPDUs
BPDU Filter:
BPDU Filter is to prevent BPDUs flood in the STP network.
LAG:
Displays the LAG number which the port belongs to.
7.5 Application Example for STP Function
Network Requirements
Switch A, B, C, D and E all support MSTP function.
A is the central switch.
B and C are switches in the convergence layer. D, E and F are switches in the access layer.
There are 6 VLANs labeled as VLAN101-VLAN106 in the network.
All switches run MSTP and belong to the same MST region.
The data in VLAN101, 103 and 105 are transmitted in the STP with B as the root bridge. The
data in VLAN102, 104 and 106 are transmitted in the STP with C as the root bridge.
Network Diagram
Configuration Procedure
Configure Switch A:
Step
Operation
Description
1 Configure ports On VLAN→802.1Q VLAN
page, configure the link
type of the related ports as Tagged, and add the
ports to VLAN101-VLAN
106. The detailed
instructions can be found in the section 802.1Q
VLAN.
86
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