Chapter 10 Quality of Service (QoS)
VMG3312-T20A User’s Guide
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10.4.1 Editing a QoS Queue
Click the edit icon in the Queue Setup screen to configure a queue.
Figure 72 Queue Setup: Edit
The following table describes the labels in this screen.
Table 47 Queue Setup: Add
LABEL DESCRIPTION
Name Enter the descriptive name of this queue.
Interface Select the interface to which this queue is applied.
This field is read-only if you are editing the queue.
Discipline Select SPQ (Strict Priority Queuing) or WRR (Weighted Round Robin).
Strict Priority Queuing (SP) services queues based on priority only. When the highest priority
queue empties, traffic on the next highest-priority queue begins. Q1 has the highest priority and
Q4 the lowest.
Weighted Round Robin Scheduling (WRR) 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
Priority Select the priority level (from 1 to 7) 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 VMG 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 VMG 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.
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