Use a protocol-based VLAN so that the VLAN only carries certain traffic types.
     
        Procedure
- 
                In the navigation pane, expand
                        .
            
 - 
                Select VLANs.
            
 - 
                In the Basic tab, select
                        Insert.
            
 - 
                In the Id box, type the
                    unique VLAN ID or use the ID provided.
            
 - 
                In the Name box, type
                    the VLAN name or use the name provided.
            
 - 
                In the Color Identifier
                    box, select the color or use the color provided.
                
                    This color is used to visually distinguish the VLANs in a network.
                 
             - 
                In the MstpInstance box,
                    select the down arrow and choose an MSTI instance from the list.
            
 - 
                In the Type box, select
                        byProtocolId.
                
                    This activates additional fields needed to configure protocol-based
                        VLANs.
                 
             - 
                To specify the VLAN port
                    membership, select the ellipsis (...) for one of
                    the following fields:
                
                    
                        Port
                            Members
                    
                    OR
                    
                        StaticMembers
                    
                    OR
                    
                        NotAllowToJoin
                    
                 
             - 
                Select each port button to
                    choose the desired membership color.
                
                    Yellow: Potential members—dynamic (potential members are treated as always
                        members)
                    OR
                    Green: Always members—static
                    OR
                    Red: Never members—not allowed to join
                    
Important   
                        In a protocol-based VLAN, a potential member becomes an active member of
                            the VLAN after a frame of the specified protocol is received.
                     
                 
             - 
                Select Insert.