DSCP QOS CS3/24 & 46 on Cisco 3850 Switch port - VOIP

We have configured QOS on all HP Procurve LAN switches as CS3/24 & 46 priority 7 for VLAN 90 (Voice VLAN)

VLAN90 is configured on Cisco 3850 and interface on VLAN90 running to additional WAN connection for VOIP traffic.

How do I enable CS3/24 & 46 QOS on the Cisco core switch to maintain the QOS tags across to the WAN gateway (also configured for CS3/24 & 46)

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DSCP tags are part of the IP packet, so they will remain with the traffic as long as some device doesn't deliberately change them.

You should have a QoS queuing policy any time you go from a higher speed interface to a lower speed one. This could be at a switch or router.
BJMagillAuthor Commented:
Although that does make sense do we not need to add something in the config to honour the QOS traffic based on the tags?
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