Tp-Link T3700G-28TQ V1 [124/415] Stp security
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Tp-Link T3700G-28TQ V1 [124/415] Stp security

Tp-Link T3700G-28TQ V1 [124/415] Stp security
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Path Cost: Path C
ost is used to choose the path and calculate the path costs of
ports in an MST region. It is an important criterion on determining the
root port. The lower value has the higher priority.
Port Role: Displays the role of the port played in the MSTP Instance.
Port Status: Displays the working status of the port.
LAG: Displays the LAG number which the port belongs to.
Note:
The port status of one port in different spanning tree instances can be different.
Global configuration Procedure for Spanning Tree function:
Step Operation Description
1
Make clear roles the switches
play in spanning tree
instances: root bridge or
designated bridge
Preparation.
2
Globally configure MSTP
parameters
Required.
Enable Spanning Tree function on the switch
and configure MSTP parameters on Spanning
Tree→STP Config→STP Config page.
3
Configure MSTP parameters
for ports
Required.
Configure MSTP parameters for ports on
Spanning Tree→Port Config→Port Config page.
4 Configure the MST region
Required. Create MST region and configure the role the
switch plays in the MST region on Spanning
Tree→MSTP Instance→
Region Config and Instance
Config page.
5
Configure MSTP parameters
for instance ports
Optional. Configure different instances in the MST region
and configure MSTP parameters for instance ports on
Spanning Tree→MSTP Instance→
Instance Port
Config page.
8.4 STP Security
Configuring protection function for devices can prevent devices from any malicious attack against
STP features. The STP Security function can be implemented on Port Protect and TC Protect
pages.
Port Protect function is to prevent the devices from any malicious attack against STP features.
8.4.1 Port Protect
On this page you can configure loop protect feature, root protect feature, TC protect feature,
BPDU protect feature and BPDU filter feature for ports. You are suggested to enable
corresponding protection feature for the qualified ports.
Loop Protect
In a stable network, a switch maintains the states of ports by receiving and processing BPDU
packets from the upstream switch. However, when link congestions or link failures occurred to the
network, a downstream switch does not receive BPDU packets for certain period, which results in

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