Hi @Chema-Spain , What is your telephony solution? Do you have a VLAN configured for Voice? Under Switching > Configure > Switch Settings i assign the Voice VLAN (in this example VLAN 12) to Trust incoming DSCP. Incoming packets on VLAN 12 will already have a DSCP tag of 46 so they are trusted. DSCP 46 maps to CoS queue 3. All other data will be in the default queue. Then on my switch ports i assign both my Access and Voice VLAN's accordingly.
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