Manual

109

User Guide

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BPDU Filter

Prevents BPDU ﬂ oods in the STP Network. If a Switch receives malicious BPDUs, it for-

wards these BPDUs to the other Switched in the Network, which can result in Spanning

Tree continuously regenerating. When this occurs the Switch occupies excessive CPU

cycles and the protocol status of BPDUs can be incorrect.

With the BPDU Filter function enabled the Port does not receive or forward BPDUs, but

it will send out its own BPDU. This prevents the Switch from being attacked by mali-

cious BPDUs and protects Spanning Tree from malicious regeneration.

Choose the menu Spanning Tree>>STP Security>>Port Protect to load the

following page.

Figure 7-10 Port Protect

The following entries are displayed on this screen:

Port Protect

Port Select:

Click the Select button to quick-select the corresponding Port.

Select:

Select the desired Port(s) for Port protect conﬁ guration.

Port:

Displays the Port number.

Loop Protect:

Prevents loops in the Network caused by recalculating STP brought on by

link failures and Network congestion.

Root Protect:

Prevents Network topology changes caused by a role change of the current

Root Bridge.