https://blog.swineson.me/en/multicast-vxlan-for-routers/


https://docs.cumulusnetworks.com/cumulus-linux-40/Network-Virtualization/Static-VXLAN-Tunnels/

====== Python vxlan tunnel======



https://briantsaunders.github.io/posts/2019/05/creating-vxlan-tunnel-in-linux-with-python/

====== mss vxlan ======

https://openwrt.org/docs/guide-user/firewall/fw3_configurations/bridge

  # Install packages
  opkg update
  opkg install kmod-br-netfilter
   
  # Configure kernel parameters
  cat << EOF >> /etc/sysctl.conf
  net.bridge.bridge-nf-call-arptables=1
  net.bridge.bridge-nf-call-iptables=1
  net.bridge.bridge-nf-call-ip6tables=1
  EOF
  /etc/init.d/sysctl restart

  iptables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o wg+ -j TCPMSS --set-mss 1330

  
====== mtu vxlan ======

  * wireguard mtu

  IPV4 only -> 1440
  IPV4+IPV6 -> 1420  

  * VXLAN mtu 1390
  
  1370 = 1500(mtu internet) - 80(wireguard) - 50(vxlan)

  * tcp mss

  1330 = 1370(vxlan) - 40(ip header(20) + tcp header(20))

{{:burim:vxlan.png?700|}}





====== vxlan cisco multicast ======

https://www.cisco.com/c/de_de/support/docs/ios-nx-os-software/nx-os-software/200262-Configure-VxLAN-Flood-And-Learn-Using-Mu.html