PLANET WGSW-50040 - Manual (Page 173)

Command mode:
Port Mode
Default:
Global configuration
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 change is not flush to TC.
Switch(config)#interface ethernet 1/2
Switch(Config-If-Ethernet1/2)#spanning-tree tcflush disable
Switch(Config-If-Ethernet1/2)#
9.2 Commands for Monitor and Debug
9.2.1 show spanning-tree
Command:
show spanning-tree [mst [<instance-id>]] [interface <interface-list>] [detail]
Function:
Display the MSTP Information.
Parameter:
<interface-list> sets interface list;
<instance-id> sets the instance ID. The valid range is from 0 to 64;
detail sets the detailed spanning-tree information.
Command mode:
Admin and Configuration Mode
Usage Guide:
This command can display the MSTP information of the instances in the current bridge.
Example:
Display the bridge MSTP.
Switch#sh spanning-tree