Line 46: |
Line 46: |
| ==802.1p priority== | | ==802.1p priority== |
| | | |
| + | 802.1p is a quality of service (QoS)/class of service (CoS) method that operates at the MAC layer (Layer 2). Equipment that supports 802.1p can add and recognize a value that indicates the priority level of the Ethernet frame. 802.1p—Displays the 802.1p priority tag values to be assigned to an egress queue, where 0 is the lowest and 7 is the highest priority. |
| | | |
| + | [[File:Networking tswos manual qos 8021p priority.png|border|class=tlt-border]] |
| + | |
| + | <table class="nd-mantable"> |
| + | <tr> |
| + | <th>Field</th> |
| + | <th>Value</th> |
| + | <th>Description</th> |
| + | </tr> |
| + | <tr> |
| + | <td>Scheduling mode</td> |
| + | <td>SP | WRR | WFQ; default: <b>WRR</b></td> |
| + | <td>Possible modes: |
| + | <ul> |
| + | <li>Strict Priority (SP): This method imparts the highest service to high priority traffic. Here, the queuing mechanism forwards as many frames as possible in a higher priority frame before moving to the queue with the next priority level.</li> |
| + | <li>Weighted Round Robin (WRR): In this method, frames or packets of all the queues in the scheduler are serviced in each cycle. Priority among the different queues is maintained by forwarding a specific number of frames in each queue per cycle in a rotational manner.</li> |
| + | <li>Combination of WRR and SP (WFQ): This queuing method is configurable in nature and it combines both WRR and SP. In this method, strict priority is given to time-sensitive or real-time traffic like voice and video, while WRR is adopted for other traffics.</li> |
| + | </ul> |
| + | </td> |
| + | </tr> |
| + | <tr> |
| + | <td>Scheduling weights</td> |
| + | <td>Integer [1..127]</td> |
| + | <td>Weight value assignment of specific port queue for WFQ/WRR </td> |
| + | </tr> |
| + | <tr> |
| + | <td>802.1P Priority</td> |
| + | <td>Integer [0..7]</td> |
| + | <td>Internal priority mapping to egress queue ID. By default TC (Traffic Class) queue values are mapped 1 to 1 with CoS values. The higher the CoS marking, the higher will be the packet priority.</td> |
| + | </tr> |
| + | </table> |
| | | |
| ==Bandwidth control== | | ==Bandwidth control== |