QoS Scheduler Policies
Quality of Service Guide 513
Figure 23: Direct Service or Subscriber or Multi-service site Association to Port Scheduler Model
Frame and Packet-Based Bandwidth Allocation
A port-based bandwidth allocation mechanism must consider the effect that line
encapsulation overhead plays relative to the bandwidth allocated per service or subscriber or
multi-service site. The service or subscriber or multi-service site level bandwidth definition
(at the queue level) operates on a packet accounting basis. For Ethernet, this includes the DLC
header, the payload and the trailing CRC. This does not include the IFG or the preamble. This
OSSG133
SAP
or MSS
Port
Agg
Rate
Limit
Queue
Queue
Queue
Priority 1
Weighted
Rate Limiting
Scheduler
Priority 2
Weighted
Rate Limiting
Scheduler
Port
Strict Rate
Limiting
Scheduler
Priority n
Weighted
Rate Limiting
Scheduler
SAP
or MSS
Agg
Rate
Limit
Queue
Queue
Queue
SAP
or MSS
Agg
Rate
Limit
Queue
Queue
Queue
SAP
or MSS
Agg
Rate
Limit
Queue
Queue
Queue
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