proc GetEndpointSetHandle { trafficItemHandle endpointSetName } {
    # Each Traffic Item can configure many EndpointSets.
    # Each EndpointSet handle looks like this:
    #     ::ixNet::OBJ-/traffic/trafficItem:4/highLevelStream:1
    #
    # Return the EndpointSet handle that matches the $flowGroupName.
    
    set highLevelStreamId ""
    foreach endpointSet [ixNet getList $trafficItemHandle highLevelStream] {
	set currentName [ixNet getAttrib $endpointSet -name]
	if {[regexp ".*$endpointSetName.*" $currentName]} {
	    set highLevelStreamId $endpointSet
	    break
	}
    }
    
    if {$highLevelStreamId == ""} {
	return 0
    }
    return $highLevelStreamId
}