nanog mailing list archives

Re: Am I the only one who thinks this is disconcerting?

From: Mark Andrews <marka () isc org>
Date: Thu, 9 Nov 2023 08:41:04 +0100

The other thing it could be is broken PMTUD / failure fragment at network MTU.   We defined socket options to do  this 
2 decades ago. 

-- 
Mark Andrews

On 9 Nov 2023, at 06:00, Matthew Pounsett <matt () conundrum com> wrote:

On Wed, Nov 8, 2023 at 2:12 AM Bryan Fields <Bryan () bryanfields net> wrote:



Could these be related to the fact that dnsvis.net is trying to reach these
servers via IPv6 and I think they use Hurricane for transit.  Since HE and
Cogent is a major gap, this causes them to time out trying to reach the C root
server over IPv6.


We have a tunnel set up to allow DNSViz to reach C-root, however
anything else single-homed on Cogent is unreachable to DNSViz via
IPv6.

Current thread:

Re: Am I the only one who thinks this is disconcerting? Matthew Pounsett (Nov 10)
- Re: Am I the only one who thinks this is disconcerting? Mark Andrews (Nov 10)
- <Possible follow-ups>
- Re: Am I the only one who thinks this is disconcerting? owen--- via NANOG (Nov 10)
  - Re: Am I the only one who thinks this is disconcerting? Bryan Fields (Nov 10)
    - Re: Am I the only one who thinks this is disconcerting? Matt Corallo (Nov 13)
    - Re: Am I the only one who thinks this is disconcerting? Ryan Hamel (Nov 13)
    - Re: Am I the only one who thinks this is disconcerting? Matt Corallo (Nov 13)
    - Re: Am I the only one who thinks this is disconcerting? Matt Corallo (Nov 13)
    - Re: Am I the only one who thinks this is disconcerting? Owen DeLong via NANOG (Nov 13)
    - Message not available
    - Re: Am I the only one who thinks this is disconcerting? Giorgio Bonfiglio via NANOG (Nov 14)