>> What does bind try to do if the client specifies a udp size of less than 512? > > From RFC 6891: > > Values lower than 512 MUST be treated as equal to 512.
Doh. The behavior I saw was a shorter authority section and no additional section (or TO) when I specified a UDP buffer of 200 as opposed to sending a non-EDNS request. But I do see that an EDS request with UDP buffer size 512 gives me exactly the same result as with buffer size 200. I speculate bind will skip part of its usual authority section and provide no TC bit as long as it can give the full answer section. The actual issue I was investigating is indeed unrelated. I was merely eliminating possibilities. John Wobus Cornell IT _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
