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Multicast support in Wireguard

Hello Friends,

I've been working on Wireguard for a while. On exploring more on the unicast and multicast support in Wireguard, I couldn't find a way to allow multicast traffic in Wireguard.

Can any suggest a better way to accomplish this experiment?Also, if Wireguard supports multicast, how to check practicallly whether the multicast traffic is pushing via Wireguard Interface.

Iam using, Wireguard version: 1.0.20200611-2 Wireguard tools version: 1.0.20210424-1 Kmod-wireguard: 5.4.89+1.0.20200611-2

Thanks in advance.

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Wireguard does not support multicast. You need to add GRE for that.

• • Edited

Technically, you can enable multicast on a wireguard interface, and it will send multicast traffic out on the interface just fine, but you can only send it to a single peer. This is only useful in some specific use cases, for example if you want to proxy mdns requests over a point to point wireguard link with avahi daemon with it's mdns reflector feature.
Command to enable it (replace wg0 with your wireguard interface name):
ip link set dev wg0 multicast on

Also, add the required multicast range/address to the allowedIPs of your peer you want to send those multicast packets to.