User Manual6. QoS service configuration 59www.qtech.ru6.1. Simple scheduling mode In simple scheduling mode, for incoming packets, according to the conversion of the outerVLAN cos value (VLAN is the single VLAN cos, VLAN SVLAN double cos value) the uplink portwill determine the packet Local Priority (internal use priority with 0-0 mapping by default,the ACL rule can be used to modify the message Local Priority); At the entrance of uplink port, configure the mapping relationship between internalpriorities and PON out-going queue, and configure the sheduling policy at the export ofPON (including: SP strict priority scheduling strategy, WRR weighted round robinscheduling strategy, and SP+WRR hybrid scheduling strategy) At PON port, it's optional to configure the maximum/minimum bandwidth for eachqueue, and the limiting rate.6.2. Hierarchical schedulingThere are three levels of scheduling: The first level is scheduling between each ONU (this level scheduling mode can be changed,the default is SP); The second level is scheduling between each ONU under each PON port (this level ofscheduling is fixed to WRR, the default weight can be changed with is 1 by default); The third layer scheduling is between ONU and the multicast channel (this level can notbe changed, fixed as SP, and the multicast channel has higher priority).Figure 6-2 Hierarchical scheduling model
