QoS egress scheduling
QoS egress scheduling works under the following rules, restrictions, and limitations:
- You must use a credit request/grant mechanism to perform egress scheduling QoS.
- The maximum credit size is 1024 Bytes.
- For each egress port there are 8 Virtual Output Queues (VOQs) allocated on each ingress transmit module (TM) core to support 8 priorities.
- Egress scheduling supports strict priority (SP), weighted fair queue (WFQ), and mixed mode scheduling.
- You can specify weighted for each VOQ only in WFQ mode.
- Fair queue (FQ) scheduling between VOQs from different TMs and with the same priority is permitted.
The figure below illustrates a QoS egress scheduling scheme.
QoS egress scheduling scheme
In the figure above P1 is the insight interface.
See the topic Configuring QoS egress scheduling for configuration information.
