xStack DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch 
The user may configure the following parameters for a MSTI on the Switch. 
Parameter                 Description 
MSTI ID 
Displays the MSTI ID previously set by the user. 
Type 
This field allows the user to choose a desired method for altering the MSTI settings. The user 
has four choices.  
Add - Select this parameter to add VIDs to the MSTI ID, in conjunction with the VID List 
parameter.  
Remove - Select this parameter to remove VIDs from the MSTI ID, in conjunction with the VID 
List parameter. 
VID List (1-4094) 
This field is used to specify the VID range from configured VLANs set on the Switch that the 
user wishes to add to this MSTI ID. Supported VIDs on the Switch range from ID number 1 to 
4094. This parameter can only be utilized if the Type chosen is Add or Remove. 
Click Apply to implement changes made. 
MSTP Port Information 
This window displays the current MSTP Port Information and can be used to update the port configuration for an MSTI ID. If a 
loop occurs, the MSTP function will use the port priority to select an interface to put into the forwarding state. Set a higher 
priority value for interfaces to be selected for forwarding first. In instances where the priority value is identical, the MSTP 
function will implement the lowest MAC address into the forwarding state and other interfaces will be blocked. Remember that 
lower priority values mean higher priorities for forwarding packets. To view the following window, click Layer 2 Features > 
Spanning Tree > MSTP Port Information: 
 
Figure 7- 43. MSTP Port Information 
To view the MSTI settings for a particular port, select the Port number, located in the top left hand corner of the screen and click 
Apply. To modify the settings for a particular MSTI Instance, click on its hyperlinked MSTI ID, which will reveal the following 
window.  
 
Figure 7- 44. MSTI Settings 
 
 
 
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