QoS and QoS Policies
64
Quality of Service Guide
3HE 11014 AAAC TQZZA Edition: 01
Figure 14 shows 4-priority scheduling for Gen-3 hardware where ports are in hybrid
mode. The QoS behavior for both access and network egress traffic is similar except
that the access egress path includes tier 3, per-customer aggregate shapers. Access
and network shapers prepare and present traffic to the port shaper, which arbitrates
between access and network traffic.
The 4-priority schedulers on the Gen-1/Gen-2 and Gen-3 hardware are very similar,
except that 4-priority scheduling on Gen-3 hardware is done on a per-SAP or a
per-VLAN basis (for access egress and network egress, respectively).
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