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, as shown in Figure: 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 dictates 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 high-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}