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Privilege Requirement
Only Admin, Operator and Power User level users have access to these
commands.
Example
Configure the bridge priority as 4096:
T1600G-52TS(config)# spanning-tree priority 4096
26.13 spanning-tree tc-defend
Description
The spanning-tree tc-defend command is used to configure the TC Protect
of Spanning Tree globally. To return to the default configuration, please use
no spanning-tree tc-defend command. A switch removes MAC address
entries upon receiving TC-BPDUs. If a malicious user continuously sends
TC-BPDUs to a switch, the switch will be busy with removing MAC address
entries, which may decrease the performance and stability of the network.
Syntax
spanning-tree tc-defend threshold
threshold
period
period
no spanning-tree tc-defend
Parameter
threshold
—— TC Threshold, ranging from 1 to 100 packets. By default, it is
20. TC Threshold is the maximum number of the TC-BPDUs received by the
switch in a TC Protect Cycle.
period
—— TC Protect Cycle, ranging from 1 to 10 in seconds. By default, it is
5.
Command Mode
Global Configuration Mode
Privilege Requirement
Only Admin, Operator and Power User level users have access to these
commands.
Example
Configure TC Threshold as 30 packets and TC Protect Cycle as 10 seconds:
T1600G-52TS(config)# spanning-tree tc-defend threshold 30 period 10
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