NETGEAR S3300-28X (GS728TX) 24x1GE - Инструкция по эксплуатации - Страница 228

Configuring Quality of Service 

228

S3300 Smart Managed Pro Switch 

802.1p to Queue Mapping

Use this screen to view or change which internal traffic classes are mapped to the 802.1p 
priority class values in Ethernet frames the device receives. The priority-to-traffic class 
mappings can be applied globally or per-interface. The mapping allows the switch to group 
various traffic types (for example, data or voice) based on their latency requirements and give 
preference to time-sensitive traffic.



To map 802.1p priorities to queues:

1. 

Select 

QoS 

>

 CoS 

>

 Advanced 

>

 802.1p to Queue Mapping

.

2. 

Select one of the following radio buttons:

•

Select the 

Global

 radio button to apply the same 802.1p priority mapping to all CoS 

configurable interfaces.

•

Select the 

Interface

 radio button to apply 802.1p priority mapping to on a 

per-interface basis. 

If you map 802.1p priorities to individual interfaces, select the 

Interface

 radio button and 

then select the interface from the list. The interface settings override the global settings 
for 802.1p priority mapping.

3. 

Select the queue to map to the predefined 802.1p priority values.

The 802.1p Priority row contains traffic class selectors for each of the eight 802.1p 
priorities to be mapped. The priority goes from low (0) to high (7). For example, traffic with 
a priority of 0 is for most data traffic and is sent using “best effort.” Traffic with a higher 
priority, such as 7, might be time-sensitive traffic, such as voice or video. 

The values in each drop-down list represent the traffic class. The traffic class is the 
hardware queue for a port. Higher traffic class values indicate a higher queue position. 
Before traffic in a lower queue is sent, it must wait for traffic in higher queues to be sent.

4. 

Click the 

Apply

 button. 

DSCP to Queue Mapping 

Use the DSCP to Queue Mapping screen to specify which internal traffic class to map the 
corresponding DSCP value. 



To map DSCP values to queues:

1. 

Select 

QoS 

>

 CoS 

>

 Advanced 

>

 DSCP to Queue Mapping

.

2. 

For each DSCP value, select a hardware queue to associate with the value. 

The traffic class is the hardware queue for a port. Higher traffic class values indicate a 
higher queue position. Before traffic in a lower queue is sent, it must wait for traffic in 
higher queues to be sent. 

3. 

Click the 

Apply

 button.