Lightning Talk: DNS Flag Day 2020
I presented on DNS Flag Day 2019 at NANOG75. The 2019 Flag Day was a success with very little disruption to production DNS services. This success has emboldened th …
| Talk Title | Lightning Talk: DNS Flag Day 2020 |
| Speakers | Eddy Winstead, Internet Systems Consortium |
| Conference | NANOG76 |
| Conf Tag | |
| Location | Washington DC |
| Date | Jun 10 2019 - Jun 12 2019 |
| URL | Talk Page |
| Slides | Talk Slides |
| Video | Talk Video |
I presented on DNS Flag Day 2019 at NANOG75. The 2019 Flag Day was a success with very little disruption to production DNS services. This success has emboldened the DNS community to propose a second Flag Day to be held in 2020 (date TBD). The DNS community did receive feedback from many operators that enough notice was not given for the 2019 event. This talk is an attempt to not repeat that same issue. I’ll discuss what is being remedied with the 2020 Flag Day: problems with IP fragmentation of DNS packets IP fragmentation is a problem on the Internet today, especially when it comes to large DNS messages. These issues can be fixed by honoring an EDNS buffer size that will not cause fragmentation and by allowing DNS to switch from UDP to TCP when larger buffer sizes are not enough.
