Re: Issues connecting to Cloudflare over IPv4 in Nashville

[Jérôme Fleury <jerome () fleury net>]

We (Cloudflare) had a 15mins connectivity incident in Chicago
on 2024-11-12, maybe that's the one you're referring to.

On Tue, Jan 28, 2025 at 8:34 PM Ian Flanders <iflanders () springnet net>
wrote:

> We saw similar a few months ago over a period with our customers
> transiting Chicago through Lumen.  We found a Cloudflare maintenance was
> going on at the time, but it seems something went wrong between them and
> Lumen.  We  could not ping Cloudflare DNS such as 1.1.1.1 or reach other
> Cloudflare sites over that period.  We had to disable our Lumen link
> through Chicago to recover.  We never established whose fault it was.
>
>
>
> -Ian
>
>
>
> *From: *NANOG <nanog-bounces+iflanders=springnet.net () nanog org> on behalf
> of Landy Bible <landy () ljb2of3 net>
> *Date: *Tuesday, January 28, 2025 at 7:19 PM
> *To: *Mel Beckman <mel () beckman org>
> *Cc: *nanog () nanog org <nanog () nanog org>
> *Subject: *Re: Issues connecting to Cloudflare over IPv4 in Nashville
>
> I don't have them handy on my phone, but luckily the issue had resolved
> itself by the time I got up Saturday morning, so no need to dig further.
>
>
>
> On Sun, Jan 26, 2025, 15:08 Mel Beckman <mel () beckman org> wrote:
>
> Do you have some example trace routes?
>
>  -mel
>
> > On Jan 26, 2025, at 12:10 PM, Landy Bible <landy () ljb2of3 net> wrote:
> >
> > A client reported issues connecting to various websites this evening
> > and I've narrowed it down to cloudflare hosted sites specifically on
> > ipv4. My traceroutes go through my upstream all the way to Comcast in
> > Nashville where they die.
> >
> > IPv6 cloudflare addresses work just fine, but several v4 addresses I
> > tested fail.
> >
> > Is anybody else seeing similar issues, or anybody from cloudflare here
> > able to help me troubleshoot?
> >
> > Thanks!
> > Landy
>
>
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