How to set packet priority in the netdev table?

Hi!

I don't understand how to set the internal priority of packets encapsulated in 802.1Q frames.

#+BEGIN_SRC

table netdev filter {
    chain egress {
         type filter hook egress device eth1 priority filter; policy accept;
         udp dport 547 meta priority set 0:6 ip6 dscp set cs6
    }
}

#+END_SRC

tcpdump shows me that the DSCP in the DHCPv6 packets is modified but not the PCP (priority code point).

#+BEGIN_QUOTE
NETDEV ADDRESS FAMILY

The Netdev address family handles packets from the device ingress and egress path. This family allows you to filter packets of any ethertype such as ARP, VLAN 802.1q, VLAN 802.1ad (Q-in-Q) as well as IPv4 and IPv6 packets.
#+END_QUOTE

Source: man 8 nft

It is unclear which interface I should use?

eth1 or eth1.832 (VLAN 832)?

I've asked for help on the OpenWrt forum but they haven't been able to answer me.

Source: https://forum.openwrt.org/t/how-do-you-set-packet-priority-in-the-netdev-table/205371/4

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Best regards
Kevin Vigouroux