Queue Setup
Click Network Setting > QoS > Queue Setup to open the screen as shown next.
Use this screen to configure QoS queue assignment to decide the priority on WAN or LAN interfaces. Traffic with higher priority gets through faster than those with lower priority. Low-priority traffic is dropped first when the network is congested.
*Configure the priority level for a QoS queue from 1 to 8. The smaller the number in the Priority column, the higher the priority.
*The corresponding classifiers will be removed automatically if a queue is deleted.
*Rate limit 0 means there is no rate limit on a queue.
Network Setting > QoS > Queue Setup
The following table describes the labels in this screen.
Network Setting > QoS > Queue Setup 
LABEL
Description
Add New Queue
Click this to create a new queue entry.
Queue Setting
Select between SP (Strict Priority), SP+WRR, or WRR (Weighted Round Robin). SP scheduling singles out the highest priority queue and ensures all queued traffic in this queue is transmitted before servicing the lower priority queues. WRR scheduling services queues on a rotating basis based on their queue weight (the number you configure in the queue Weight field. Queues with larger weights get more service than queues with smaller weights. If you choose SP+WRR, the first and second queue will be SP, and the third and fourth queue will be WRR.
#
This is the index number of the entry.
Status
This field displays whether the queue is active or not. A yellow bulb signifies that this queue is active. A gray bulb signifies that this queue is not active.
Name
This shows the descriptive name of this queue.
Interface
This shows the name of the Zyxel Device’s interface through which traffic in this queue passes.
Discipline
This shows the discipline of the queue. The discipline is changed according to the option chosen in Queue Setting. If you choose SP, the discipline will be SP. If you choose SP+WRR, the discipline of the first and second queue will be SP, and the third and fourth queue will be WRR. If you choose WRR, the discipline will be WRR. Strict Priority scheduling services the remaining queues using WRR.
WRR scheduling services queues on a rotating basis based on their queue weight (the number you configure in the queue Weight field). Queues with larger weights get more service than queues with smaller weights.
*Queue weights can only be changed when Weighted Round Robin is selected.
Priority
This shows the priority of this queue. The lower the number, the higher the priority level.
Weight
This shows the weight of this queue.
Buffer Management
This shows the queue management algorithm used for this queue.
Queue management algorithms determine how the Zyxel Device should handle packets when it receives too many (network congestion).
Rate Limit
This shows the maximum transmission rate allowed for traffic on this queue.
Modify
Click the Edit icon to edit the queue.
Click the Delete icon to delete an existing queue. Note that subsequent rules move up by one when you take this action.
Add a QoS Queue
Click Add New Queue or the Edit icon in the Queue Setup screen to configure a queue.
Network Setting > QoS > Queue Setup > Add New Queue/Edit
The following table describes the labels in this screen.
Network Setting > QoS > Queue Setup > Add New Queue/Edit 
LABEL
Description
Active
Click this switch to enable the queue.
Name
Enter a descriptive name for this queue. You can use up to 32 printable characters except [ " ], [ ` ], [ ' ], [ < ], [ > ], [ ^ ], [ $ ], [ | ], [ & ], or [ ; ]. Spaces are allowed.
Interface
Select the interface to which this queue is applied.
This field is read-only if you are editing the queue.
Priority
Select the priority level (from 1 to 8) of this queue.
The smaller the number, the higher the priority level. Traffic assigned to higher priority queues gets through faster while traffic in lower priority queues is dropped if the network is congested.
Weight
Select the weight (from 1 to 8) of this queue.
If two queues have the same priority level, the Zyxel Device divides the bandwidth across the queues according to their weights. Queues with larger weights get more bandwidth than queues with smaller weights.
Buffer Management
This field displays Drop Tail (DT). Drop Tail (DT) is a simple queue management algorithm that allows the Zyxel Device buffer to accept as many packets as it can until it is full. Once the buffer is full, new packets that arrive are dropped until there is space in the buffer again (packets are transmitted out of it).
Rate Limit
Specify the maximum transmission rate (in Kbps) allowed for traffic on this queue. If you enter 0 here, this means there's no rate limit on this queue.
Cancel
Click Cancel to exit this screen without saving.
OK
Click OK to save your changes.