Allied Telesis SwitchBlade x3100 Series Manual page 390

Introduction Spanning Tree Protocol (STP and RSTP)
4.5.3.16 Enable/Disable STP
The default Spanning Tree instance is disabled (by default) at switch start up, and Spanning Tree instances cre-
ated by a user are disabled by default when they are created. To enable or disable Spanning Tree instances, use
the commands ENABLE/DISABLE STP.
4.5.3.17 Enable/Disable Interface
When an STP is enabled in a looped or meshed network, it dynamically enables and disables particular ports
belonging to it, to eliminate redundant links. All ports in a VLAN belong to the same STP, and their participa-
tion in STP configuration is enabled by default when STP is enabled, and hence the possibility of them being
elected to the STP's active topology. To enable or disable particular ports for participation or exclusion from
STP operations, use the commands ENABLE and DISABLE STP INTERFACE.
This command also supports the TOPOLOGYCHANGE parameter to control the detection of topology
changes on the associated port. This allows the disabling of topology change detection on ports that are known
to be connected to single end stations that could cause the Topology Change Notification mechanism to be
triggered for the entire network when the end station is power cycled.
4.5.3.18 Display Counters
To display STP counters, use the following command, with the results shown below.
SHOW STP COUNTER
officer SEC> SHOW STP COUNTER
--- STP Counter Information ---------------------------------------------------
STP Instance Name..................... MAIN
STP Packets Transmitted............... 0
STP Packets Received.................. 0
Configuration BPDU Transmitted........ 0
Configuration BPDU Received........... 0
TCN BPDU Transmitted.................. 0
TCN BPDU Received..................... 0
Invalid BPDU.......................... 0
Port Disabled......................... 0
Invalid Protocol...................... 0
Invalid Type.......................... 0
Invalid Message Age................... 0
Configuration BPDU length............. 0
TCN BPDU length....................... 0
4-70
Software Reference for SwitchBlade x3100 Series Switches (Layer Two Switching)