QoS in MC-MLPPP
Quality of Service Guide 839
• Changes of parameters in the currently assigned ingress and egress QoS profiles.
QoS in FRF.12 End-to-End Fragmentation
When end-to-end fragmentation is enabled on an FR SAP, the queuing and scheduling on the
XMA or MDA is reusing the existing FR SAP high and low priority queues are show in
Figure 55.
Figure 55: DLC Egress Channel Queue Scheduling
Some minor modifications are introduced to accommodate end-to-end FRF.12 fragments.
The user configured FR scheduling class for this SAP will dictate which of the FR SAP XMA
or MDA queues should be used to queue the fragments. Classes 0 and 1 map all fragments of
the FR SAP to the Hi-Priority SAP queue. Classes 2 and 3 map all fragments of the FR SAP
to the Low-Priority SAP queue.
The scheduling parameters of these queues have to be modified from existing ones as follows:
• Hi priority (HP) SAP queue: SAP_HP_Q_PIR= Sum{all SAP_FC_Q_PIR}
• Low priority (LP) SAP queue: SAP_LP_Q_WRR_Weight = Sum{all
SAP_FC_Q_CIR}
al_0196
ctl
hp
ef
AF1
Expedited
Raw Control Traffic
Terminating, SAP-Egress Policy #1
Channel SAP Queue Prioritization on MDA
Non-expedited
AF2
BE
Another SAP
hp
lp
lp
Shaper
RR
Strict
Priority
Fabric
WRR
Shaper
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