# Replaces "protocol bgp ferrix" in bird.conf when ferrix runs on this host.
# Only the addresses and "multihop" differ from the WireGuard version; the
# import filter and everything about export control stay as they are.
#
# Without "multihop" BIRD looks for the neighbour on a directly connected
# network, cannot find ::1 there, and disables the protocol with
# "Error: Invalid next hop". After fixing that, `birdc enable ferrix` if a
# reconfigure does not bring it back by itself.
protocol bgp ferrix
{
    description "ferrix_bgp teaching lab (announce only, same host)";
    local ::1 as 210036;
    neighbor ::1 as FERRIX_ASN;
    # Both ends are this machine, so there is no directly connected
    # neighbour for "direct" (the eBGP default) to find.
    multihop;
    passive on;
    ipv6 {
        import filter ferrix_import;
        import limit 130 action block;
        export none;
    };
}