Ethernet configuration for Matter

[QuentinCaldeira-eaton]

Hi !
I'm using Zephyr with connectedhomeip in order to create a Matter application. I'm working with a nucleoh563zi, which is an ethernet board. I would like to make a PoC for the zephyr standalone platform on connectedhomeip, but I'm stuck with network configuration I guess. Also, my device doesn't appears in my router interface at all.

Firstly for context, Matter seems to use net_if to get the first interface, bind a socket with 0:0:0:0 IP Addres on port 5540. It seems that Matter needs at least one link local and one multicast addresses. Also, Matter use mDNS in order to find the device. My ethernet configuration is the following :

iface = net_if_get_first_by_type(&NET_L2_GET_NAME(ETHERNET)); //We only search for ethernet interface
    if (!iface) {
        ChipLogProgress(DeviceLayer, "No Ethernet interface found");
    } else {
        ChipLogProgress(DeviceLayer, "Found an Ethernet interface");
    }

    
    struct net_dhcpv6_params dhcpv6_params;
    net_dhcpv6_start(iface, &dhcpv6_params); //Start dhcpv6

    struct in6_addr my_ipv6_addr;
    net_addr_pton(AF_INET6, "fe80::1", &my_ipv6_addr);
    net_if_ipv6_addr_add(iface, &my_ipv6_addr, NET_ADDR_MANUAL, 0);

I don't know why, but when I perform a dhcpv6, my net_if doesn't have unicast address and a prefix. Could be a router configuration issue ? Also idk it I should bind each addresses to a socket. Currently, I can't commission my device, and dns -sd -B _matterc._udp returns nothing. This is the prj.conf

# Enable CHIP
CONFIG_NET_L2_OPENTHREAD=n
CONFIG_CHIP_PROJECT_CONFIG="include/CHIPProjectConfig.h"
CONFIG_CHIP_DEVICE_PRODUCT_ID=32768
CONFIG_CHIP=y
CONFIG_CHIP_ENABLE_PAIRING_AUTOSTART=y
CONFIG_STD_CPP17=y
CONFIG_CHIP_APP_LOG_LEVEL=3
CONFIG_MAIN_STACK_SIZE=32768
CONFIG_NET_L2_ETHERNET=y
CONFIG_NET_IF_MCAST_IPV6_ADDR_COUNT=14
CONFIG_THREAD_NAME=y
CONFIG_MATTER_LOG_LEVEL_DBG=y
CONFIG_NET_CONTEXT_RECV_PKTINFO=y #avoid IPV6_PKTINFO error
CONFIG_NET_SHELL=y
CONFIG_NET_DHCPV6=y
CONFIG_NET_ROUTE_MCAST=y
CONFIG_NET_IPV6_MLD=y
CONFIG_NET_MAX_MCAST_ROUTES=10
CONFIG_NET_MGMT=y
CONFIG_NET_L2_ETHERNET_MGMT=y

So far, I've tested with net_shell things like net conn, and net iface. When I try to net ping, it always results with a timeout and idk why.

mDNS is performed with connectedhomeip and doesn't use Zephyr implementation, so it's surely not the problem. Maybe my ethernet is misconfigured ?