4 qos troubleshooting, Roubleshooting – PLANET XGS3-24042 User Manual
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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.
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