Lobos Tech LB-FEA800M - Manual (Page 57)

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Priority Queue Service settings:
First Come First Service: The sequence of packets sent is depend on
arrive order.
All High before Low: The high priority packets sent before low priority
packets.
Weighted Round Robin: Select the preference given to packets in the
switch's high-priority queue.
These options represent the number of high priority packets sent before
one low priority packet is sent. For example, 2 High :1 Low means that
the switch sends 2 high priority packets before sending 1 low priority
packet.
Enable Delay Bound: Limit the low priority packets queuing time in
switch. Default Max Delay Time is 255ms.
If the low priority packet stays in switch exceed Max Delay Time, it will
be sent. The valid range is 1~255 ms.
NOTE: Make sure of “Max bridge transit delay bound control” is enabled
before enable Delay Bound, because Enable Delay Bound must be
work under “Max bridge transit delay bound control is enabled” situation.