> On 22 Feb 2016, at 18:41, Bob Harold <rharo...@umich.edu> wrote: > > I am not understanding one thing. > > 3.3.2. Sending Responses > > Says that a server "that receives a query ... without the edns-tcp-keepalive > option ... MAY include the edns-tcp-keepalive option in the response" > > But > > 3.4. TCP Session Management > > Indicates that a server can only send the edns-tcp-keepalive option in an > answer if the client includes it in the request.
It is subtle, but is the difference between an EDNS0 OPT RR and a specific EDNS0 option: - yes, the server can only send an EDNS0 OPT RR if the client includes one in the request but… - as long as there was an EDNS0 OPT RR in the request, the server can send back the edns-tcp-keepalive option even there wasn’t one in the OPT RR in the request. Sara. _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
