PLANET XGS3-24042 - Manual (Page 176)

18-13
18.4 QoS Troubleshooting
 trust cos and EXP can be used with other trust or Policy Map.
 trust dscp can be used with other trust or Policy Map. This configuration takes effect to IPv4 and IPv6
packets.
 trust exp, trust dscp and trust cos may be configured at the same time, the priority is:
EXP>DSCP>COS.
 If the dynamic VLAN (mac vlan/voice vlan/ip subnet vlan/protocol vlan) is configured, then the packet
COS value equals COS value of the dynamic VLAN.
 At present, it is not recommended to synchronously use policy map on VLAN and VLAN’s port.