GitHub user joolli added a comment to the discussion: Host based routing - 
EVPN-VXLAN to the host - Single VXLAN Device (SVD)

Here is something for ifupdown or ifupdown-ng... I haven't tried it so you 
might need to adjust it a little bit

```
auto lo
iface lo inet loopback
       address <VTEP IP>

auto br0
iface br0 inet manual
        pre-up ip link set dev $IFACE addrgenmode none
        pre-up ip link set dev $IFACE type bridge vlan_filtering 1
        pre-up ip link set dev $IFACE type bridge mcast_snooping 0
        pre-up ip link set dev $IFACE type bridge vlan_default_pvid 1
        pre-up ip link set dev $IFACE mtu 9000
        up sysctl -w net.ipv4.conf.all.forwarding=1
        # guest nets
        post-up ip link add ethgsta type veth peer name ethgstb
        post-up ip link set dev ethgsta addrgenmode none
        post-up ip link set dev ethgstb addrgenmode none
        post-up ip link set dev ethgsta up
        post-up ip link set dev ethgstb up
        post-up ip link set dev ethgsta master $IFACE

auto vxlan0
iface vxlan0
        pre-up ip link add dev $IFACE type vxlan external
        pre-up ip link set $IFACE type vxlan local <loopback address> dstport 
4789 id 0 nolearning
        pre-up ip link set $IFACE type bridge_slave neigh_suppress on learning 
off
        pre-up ip link set dev $IFACE master br0
        pre-up ip link set dev $IFACE mtu 9000
        pre-up ip link set dev $IFACE addrgenmode none
```

GitHub link: 
https://github.com/apache/cloudstack/discussions/10786#discussioncomment-13349522

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