Creating a Spanning Tree Group

To create a new spanning tree group:

1. From the spanning tree group Configuration tab, click Insert.

The STG, Insert Configuration dialog box opens.

2. Insert values or select options for the dialog box items.
3. Click Insert.
   
   

   Field	Description
   ID	The ID number for the spanning tree group.
   Priority	Sets the STP bridge priority, in decimal. The range is 0 (highest priority) to 65535 (lowest priority). The default is 32768.
   BridgeMaxAge	The value in hundredths of a second that all bridges use for MaxAge when this bridge is acting as the root. Note: The 802.1D-1990 standard specifies that the range for this parameter is related to the value of dot1dStpBridgeHelloTime. The default is 2000 (20 seconds).
   BridgeHelloTime	The value in hundredths of a second that all bridges use for HelloTime when this bridge is acting as the root. The granularity of this timer is specified by the IEEE 802.1D-1990 standard to be in increments of 1/100 of a second. The default is 200 (2 seconds).
   BridgeForwardDelay.	The value in hundredths of a second that all bridges use for Forward Delay when this bridge is acting as the root. The default is 1500 (15 seconds).
   EnableStp	Enables or disables the spanning tree algorithm for the spanning tree group.
   StpTrapEnable	Enables SNMP traps to be sent to trace receiver every time an STP topology occurs.
   TaggedBpduAddress	Represents a MAC address; specifically for tagged BPDUs.
   TaggedBpduVlanId	Represents the VLAN tag associated with the spanning tree group. This ID is used to tag BPDUs through a non-IEEE tagging bridge to another Passport switch.
   Port Members	The ports you want to become members of the new spanning tree group. Only ports that are not members of any other STG are selectable.

   
   
   
   

   Note: By default, the TaggedBpduVlanId is an address calculated based on the spanning tree group ID by Device Manager. Accepting the default value calculated by Device Manager makes it much simpler to coordinate spanning tree groups across multiple switches. If you enter a custom value for this field, you must manually coordinate it across all switches.

   
   
   
   

   Note: Nontagged ports can belong to one and only one spanning tree group.