TP-Link T1500G-10PS T1500G-10PSUN V1 User Guide - Page 95

BPDU Filter, Spanning Tree, STP Security, Port Protect

Page 95 highlights

 BPDU Filter BPDU filter function is to prevent BPDUs flood in the STP network. If a switch receives malicious BPDUs, it forwards these BPDUs to the other switched in the network, which may result in spanning trees being continuously regenerated. In this case, the switch occupying too much CPU or the protocol status of BPDUs is wrong. With BPDU filter function enabled, a port does not receive or forward BPDUs, but it sends out its own BPDUs. Such a mechanism prevents the switch from being attacked by BPDUs so as to guarantee generation the spanning trees correct. 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 UNIT:1/LAGS: Select: Port: Loop Protect: Root Protect: TC Protect: Click 1 to configure the physical ports. Click LAGS to configure the link aggregation groups. Select the desired port for port protect configuration. It is multi-optional. Displays the port number of the switch. Loop Protect is to prevent the loops in the network brought by recalculating STP because of link failures and network congestions. Root Protect is to prevent wrong network topology change caused by the role change of the current legal root bridge. TC Protect is to prevent the decrease of the performance and stability of the switch brought by continuously removing MAC address entries upon receiving TC-BPDUs in the STP network. 85

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BPDU Filter
BPDU filter function is to prevent BPDUs flood in the STP network. If a switch receives
malicious BPDUs, it forwards these BPDUs to the other switched in the network, which may
result in spanning trees being continuously regenerated. In this case, the switch occupying too
much CPU or the protocol status of BPDUs is wrong.
With BPDU filter function enabled, a port does not receive or forward BPDUs, but it sends out
its own BPDUs. Such a mechanism prevents the switch from being attacked by BPDUs so as to
guarantee generation the spanning trees correct.
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
UNIT:1/LAGS:
Click
1
to configure the physical ports. Click
LAGS
to configure the
link aggregation groups.
Select:
Select the desired port for port protect configuration. It is
multi-optional.
Port:
Displays the port number of the switch.
Loop Protect:
Loop Protect is to prevent the loops in the network brought by
recalculating
STP
because
of
link
failures
and
network
congestions.
Root Protect:
Root Protect is to prevent wrong network topology change caused
by the role change of the current legal root bridge.
TC Protect:
TC Protect is to prevent the decrease of the performance and
stability of the switch brought by continuously removing MAC
address entries upon receiving TC-BPDUs in the STP network.
85