Quality of Service Guide QoS and QoS Policies
Edition: 01 3HE 11014 AAAC TQZZA 81
3.2.3.4 4-Priority (Gen-3) Scheduling
At access ingress, 4-priority scheduling for Gen-3 hardware is the same as 4-priority
scheduling for Gen-2 or Gen-1 hardware, except that scheduling is done on a
per-SAP basis. For more information, see QoS for Gen-3 Adapter Cards and
Platforms.
3.2.3.5 16-Priority Scheduling
For 16-priority scheduling, the rate-based schedulers (CIR and PIR) are combined
with the strict priority schedulers (CoS-8 queue first to CoS-1 queue last).
For general information on 16-priority scheduling, see Network Egress 16-Priority
Scheduling. Access ingress 16-priority scheduling functions in a similar fashion to
network egress 16-priority scheduling.
3.2.3.6 Ingress Queuing and Scheduling for BMU Traffic
The 7705 SAR treats broadcast, multicast, and unknown traffic in the same way as
unicast traffic. After being classified, the BMU traffic can be mapped to individual
queues in order to be forwarded to the fabric. Classification of unicast and BMU
traffic does not differ, which means that BMU traffic that has been classified to a
BMU-designated queue can be shaped at its own rate, offering better control and
fairer usage of fabric resources. For more information, see BMU Support.
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