Distributed Anycast Gateway for EVPN-VxLAN Data-Center

[RaMa-arg]

Hello everyone, I am facing issues with anycast gateway setup. I receive duplicated packets when ping inter-vlan and external routing. If you have some example of a success setup could you please share the config? thanks

[kniteli]

I tried a few ways to get this working within frr only, but I never managed and it's not really explained anywhere. Eventually I just set up a rule in nftables for the bridge filter chain dropping any traffic addressed to the anycast mac leaving through a vxlan tunnel interface. It looks something like:

oif @tunnel_interfaces ether daddr $ANYCAST_MAC drop

[kniteli]

I think I found the correct solution to this, unless there's some setting to get frr to do it for you. I'm using a single vxlan device, so it's possibly different if you are using separate bridges (try adding an entry for each bridge):

bridge fdb add <anycast_mac> dev <bridge_interface> self local

or for systemd-networkd, in your bridge interface's .network file

[BridgeFDB]
MACAddress=<anycast_mac>

[RaMa-arg]

yes, that's a solution when using single vxlan device!

I have no faced same issue when using separate bridges.