EnGenius ERB9250 User Manual page 47

Unlimited Priority Queue: The LAN IP address will not be bounded in the QoS
limitation.
High/Low Priority Queue: This can put the packets in the protocol and port
range to High/Low QoS Queue.
Bandwidth Allocation:
This can reserve / limit the throughput of specific protocols and port range.
You can set the upper bound and Lower bound.
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