Configuring Subinterface Queues
Subinterface queues are nothing different then the physical ports queues expect that number of queues assigned to a subinterface can be set via profile and by-default profile1 is set which sets 4 queues to be created for services.
User can configure the service-queue profile via cli "hardware-profile service-queue (profile1 | profile2)".
Profile1 supports 4 new queues creation for services,which is also a default profile. Profile2 supports 8 new queues creation for services.
These queues will be created or deleted when the encap is set or unset on a subinterface respectively. Like and other interface, subinterface has a default ingress egress mapping profile. i.e. dscp-to-queue and dscp-color-to-dscp respectively. Subinterface has default queuing-policy in order to support QoS treatment on the queues.
Mapping profiles (dscp-to-queue and dscp-color-to-dscp) maps packets dscp to/from 8 traffic classes. When the hardware-queues created are 4, 8 traffic classes will be mapped to these 4 hardware-queues implicitly as shown in
Table 21-13:
Table 21-13: Traffic class to queue mapping
Traffic class | Queue |
|---|
0 | 0 |
1, 2, 3 | 1 |
4, 5 | 2 |
6-7 | 3 |
This map can be checked via this command:
show queue remapping
Output:
Port queue remapping:
+------------+-----------------------+
| Queue/tc | hardware-queue |
+------------+-----------------------+
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
+------------+-----------------------+
Service queue remapping:
+------------+-----------------------+
| Queue/tc | hardware-queue |
+------------+-----------------------+
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 3 |
| 7 | 3 |
+------------+-----------------------+
When the number of profile 2 is active, number of new queues created will be 8 and the traffic class to hardware queues map will be one to one.
This map can be checked via this command:
show queue remapping
Output:
Port queue remapping:
+------------+-----------------------+
| Queue/tc | hardware-queue |
+------------+-----------------------+
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
+------------+-----------------------+
Service queue remapping:
+------------+-----------------------+
| Queue/tc | hardware-queue |
+------------+-----------------------+
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
+------------+-----------------------+
Last modified date: 06/07/2023