It does not have to to with link, udp or ip it is a limitation of the dns spec. Here is a extention that "fixes" it: https://tools.ietf.org/html/draft-ietf-dns

It does not have to to with link, udp or ip it is a limitation of the dns spec. Here is a extention that "fixes" it: https://tools.ietf.org/html/draft-ietf-dnsind-udp-size-02 https://tools.ietf.org/html/draft-ietf-dnsind-udp-size-02 I have not seen that spec extention implemented in the wild. I just found the extention so I have on the other side not looked for it.