%% You should probably cite rfc8767 instead of this I-D. @techreport{ietf-dnsop-serve-stale-02, number = {draft-ietf-dnsop-serve-stale-02}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-dnsop-serve-stale/02/}, author = {David C Lawrence and Warren "Ace" Kumari and Puneet Sood}, title = {{Serving Stale Data to Improve DNS Resiliency}}, pagetotal = 12, year = , month = , day = , abstract = {This draft defines a method for recursive resolvers to use stale DNS data to avoid outages when authoritative nameservers cannot be reached to refresh expired data. It updates the definition of TTL from {[}RFC1034{]} and {[}RFC1035{]} to make it clear that data can be kept in the cache beyond the TTL expiry and used for responses when a refreshed answer is not readily available.}, }