router id 172.20.170.192; define OWNAS = 4242423934; define OWNIP = fd62:77fb:94bf::2300; define DN42_REGION = 41; function is_self_net() { return net ~ [fd62:77fb:94bf::/48+]; } function is_valid_network() { return net ~ [ fd00::/8{44,64} # ULA address space as per RFC 4193 ]; }