The wg0 interface can send and receive multicast packets, but the eth0 interface cannot send or receive multicast packets.

[goldsoft8888]

I am using two ARM64 devices running Armbian. The site-to-site connection is already established, but SMCroute is not sending data to ETH0.
Is there a complete tutorial for using SMCroute with site-to-site? I referred to this guide, but it didn’t work, and I’m not sure where the issue is.

The wg0 interface can send and receive multicast packets, but the eth0 interface cannot send or receive multicast packets. Both wg0 and eth0 have multicast functionality enabled.

Configuration:
bash

iptables -t mangle -A PREROUTING -i eth0 -d 239.255.255.250 -j TTL --ttl-inc 2
ip link set dev wg0 multicast on
ip link set dev wg0 multicast on
/etc/smcroute.conf:
bash

phyint eth0 enable
phyint wg0 enable

mgroup from eth0 group 239.255.255.250
mroute from eth0 group 239.255.255.250 to wg0

mgroup from wg0 group 239.255.255.250
mroute from wg0 group 239.255.255.250 to eth0
Output from smcrouted -n:
less

smcroute[6339]: SMCRoute v2.5.6
smcroute[6339]: IPv4 multicast routing API already in use: Address already in use
smcroute[6339]: /etc/smcroute.conf line 5: mroute: inbound eth0 is not a known phyint
smcroute[6339]: /etc/smcroute.conf line 8: mroute: inbound wg0 is not a known phyint
smcroute[6339]: Parse error in /etc/smcroute.conf
smcroute[6339]: Ready, waiting for client request or kernel event.