ZyXEL P-660R-T1 v3s User Guide - Page 97
Automatic Priority Queue Assignment, Quality of Service QoS
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Chapter 11 Quality of Service (QoS) 11.3.3 Automatic Priority Queue Assignment If you enable QoS on the ZyXEL Device, the ZyXEL Device can automatically base on the IEEE 802.1p priority level, IP precedence and/or packet length to assign priority to traffic which does not match a class. The following table shows you the internal layer-2 and layer-3 QoS mapping on the ZyXEL Device. On the ZyXEL Device, traffic assigned to higher priority queues gets through faster while traffic in lower index queues is dropped if the network is congested. Table 30 Internal Layer2 and Layer3 QoS Mapping LAYER 2 LAYER 3 PRIORITY QUEUE IEEE 802.1P USER PRIORITY (ETHERNET PRIORITY) TOS (IP PRECEDENCE) DSCP IP PACKET LENGTH (BYTE) 0 1 0 000000 1 2 2 0 0 000000 >1100 3 3 4 4 1 001110 250~1100 001100 001010 001000 2 010110 010100 010010 010000 5 5 6 6 3 011110