I have a loopback IPv6 address on a server. IP addr = 2dd:1111:1111:1111:1111::1

    

   I use BGP to announce this to the upstream router. Client traffic comes in through an interface ens3 connected to the router with destination address as the loopback. Bird configuration: 

   protocol direct {

        description "Local anycast addresses";

        export none;

        interface "lo";

}

# The kernel protocol gives us access to the kernel routing table.

protocol kernel {

        #persist;               # Don't remove routes on shutdown

        scan time 20;           # Scan kernel routing table every 20 seconds

        export all;             # Default is export none

}

# The device protocol is needed in order to see what addresses are local

# to this server.

protocol device {

        scan time 10;           # Scan interfaces every 10 seconds

}

protocol bgp {

        description "Arya";

        import none;

        local as 65001;

        neighbor neighbourIPv6ADDR as 100;

        direct;                 # Neighbors are directly connected

                hold time 240;

        connect retry time 120;

        keepalive time 80;      # defaults to hold time / 3

#export filter packetdns;

                export all;

}

  

All this works great. Now, when client traffic comes in we get the following entries in the routing table: 

.

.

.