PLANET WGSW-52040 - Manual (Page 348)

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19.1.31 spanning-tree tcflush (Global mode)
Command:
spanning-tree tcflush {enable| disable| protect}
no spanning-tree tcflush
Function:
Configure the spanning-tree flush mode once the topology changes. “no spanning-tree tcflush” restores to default
setting.
Parameter:
enable: The spanning-tree flush once the topology changes.
disable: The spanning tree don’t flush when the topology changes.
protect: the spanning-tree flush not more than one time every ten seconds.
Command mode:
Global mode
Default:
Enable
Usage Guide:
According to MSTP, when topology changes, the port that send change message clears MAC/ARP table (FLUSH). In
fact it is not needed for some network environment to do FLUSH with every topology change. At the same time, as a
method to avoid network assault, we allow the network administrator to configure FLUSH mode by the command
Note: For the complicated network, especially need to switch from one spanning tree branch to another rapidly, the
disable mode is not recommended.
Example:
Configure the spanning-tree flush mode once the topology changes is not flush to TC.
Switch(config)#spanning-tree tcflush disable
Switch(config)#
19.1.32 spanning-tree tcflush (Port mode)
Command:
spanning-tree tcflush {enable| disable| protect}