IEEE Standard for 802.1D-2004 Bridge definition
number of queues is 2 (default), mapping
priority 0,1,2,3 → queue 0
priority 4,5,6,7 → queue 1
number of queues is 4 mapping
priority 0,3 → queue 0
priority 1,2 → queue 1
priority 4,5 → queue 2
priority 6,7 → queue 3
number of queues is 8 mapping
priority 0 → queue 2
priority 1 → queue 0
priority 2 → queue 1
priority 3 → queue 3
priority 4 → queue 4
priority 5 → queue 5
priority 6 → queue 6
priority 7 → queue 7
is it Correct ???