TP-Link T1500-28TC TL-SL2428 T1500-28TCUN V1 Configuration Guide - Page 211

feature, spanning-tree bpdufilter

Page 211 highlights

Configuring Spanning Tree STP Security Configurations Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 interface {gigabitEthernet port | range gigabitEthernet port-list] [port-channel port-channel | range port-channel port-channel-list} Enter interface configuration mode. spanning-tree guard loop (Optional) Enable the Loop Protect feature on the port. t is recommended to enable this function on root ports and alternate ports. Loop Protect function is used to prevent loops caused by link congestions or link failures. With Loop Protect function enabled, the port will temporarily transit to blocking state when it does not receive BPDUs. After the link restores to normal, the port will transit to its normal state, so loops can be prevented. spanning-tree guard root (Optional) Enable the Root Protect function on the port. It is recommended to enable this function on the designated ports of the root bridge. Root Protect function is used to ensure that the desired root bridge will not lose its position. With root protect function enabled, the port will temporarily transit to blocking state when it receives higher-priority BDPUs. After two times of forward delay, if the port does not receive any higher-priority BDPUs, it will transit to its normal state. spanning-tree bpdufilter (Optional) Enable the BPDU Filter function on the port. It is It is recommended to enable this function on edge ports. BPDU filter function is to prevent BPDU flooding in the network. With BPDU filter function enabled, the port does not receive or forward BPDUs, but it sends out its own BPDUs, preventing the switch from being attacked by BPDUs. spanning-tree bpduguard (Optional) Enable the BPDU Protect function on the port. It is It is recommended to enable this function on edge ports. BPDU Protect function is used to prevent the edge port from receiving BPUDs. With BPDU protect function enabled, the edge port will be shutdown when it receives BPDUs, and reports these cases to the administrator. Only the administrator can restore it.. spanning-tree guard tc Enable the TC Protect function on the port. 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 network. show spanning-tree interface-security [ fastEthernet port | gigabitEthernet port | portchannel lagid ] [ bpdufilter | bpduguard | loop | root | tc | tc-defend ] (Optional) View the protect inforamtion of ports. port: Specify the port number. lagid: Specify the ID of the LAG. end Return to privileged EXEC mode. Configuration Guide 190

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Configuration Guide
190
Configuring Spanning Tree
STP Security Configurations
Step 2
interface {gigabitEthernet
port
| range gigabitEthernet
port-list
]
[port-channel
port-channel
|
range port-channel
port-channel-list
}
Enter interface configuration mode.
Step 3
spanning-tree guard loop
(Optional) Enable the Loop Protect
feature
on the port. t is recommended to enable this
function on root ports and alternate ports.
Loop Protect function is used to prevent loops caused by link congestions or link failures. With
Loop Protect function enabled, the port will temporarily transit to blocking state when it does
not receive BPDUs. After the link restores to normal, the port will transit to its normal state, so
loops can be prevented.
Step 4
spanning-tree guard root
(Optional) Enable the Root Protect function on the port. It is recommended to enable this
function on the designated ports of the root bridge.
Root Protect function is used to ensure that the desired root bridge will not lose its position.
With root protect function enabled, the port will temporarily transit to blocking state when it
receives higher-priority BDPUs. After two times of forward delay, if the port does not receive
any higher-priority BDPUs, it will transit to its normal state.
Step 5
spanning-tree bpdufilter
(Optional) Enable the BPDU Filter function on the port. It is It is recommended to enable this
function on edge ports.
BPDU filter function is to prevent BPDU flooding in the network. With BPDU filter function
enabled, the port does not receive or forward BPDUs, but it sends out its own BPDUs,
preventing the switch from being attacked by BPDUs.
Step 6
spanning-tree bpduguard
(Optional) Enable the BPDU Protect function on the port. It is It is recommended to enable this
function on edge ports.
BPDU Protect function is used to prevent the edge port from receiving BPUDs. With BPDU
protect function enabled, the edge port will be shutdown when it receives BPDUs, and reports
these cases to the administrator. Only the administrator can restore it..
Step 7
spanning-tree guard tc
Enable the TC Protect function on the port.
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
network.
Step 8
show spanning-tree interface-security [ fastEthernet
port
| gigabitEthernet
port
|
port-
channel
l
agid
] [ bpdufilter | bpduguard | loop | root | tc | tc-defend ]
(Optional) View the protect inforamtion of
ports.
port
:
Specify the port number.
lagid
:
Specify the ID of the LAG.
Step 9
end
Return to privileged EXEC mode.