19-117
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)#
19.1.31 spanning-tree tcflush (Port mode)
Command:
spanning-tree tcflush {enable| disable| protect}
no spanning-tree tcflush
Function:
Configure the spanning-tree flush mode for port 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:
Port Mode
Default:
Global configuration