[outages] Spectrum/Charter IPv6 connectivity to CloudFlare down in Texas

[Tom Strickx]

Hey folks,

Could either of you contact me off-list so I can investigate? A specific
start-of-problem would be super helpful.
-- 
Tom Strickx
Principal Network Engineer
AS13335 - Cloudflare


On Thu, Apr 20, 2023 at 4:38 AM Daniel Marks via Outages <
outages at outages.org> wrote:

> Have been dealing with this for 2 days, nobody at Spectrum can figure this
> out.
>
> Daniel Marks
> May Mobility, Inc
>
> >
> > On Apr 19, 2023, at 19:26, Carl Perry via Outages <outages at outages.org>
> wrote:
> >
> > Things have been rather slow the last couple of days, just figured out
> why; No IPv6 connectivity to any CloudFlare services.
> >
> > > mtr -6 --report-wide cloudflare.com
> > Start: 2023-04-19T23:20:42+0000
> > HOST: defiant Loss%   Snt   Last   Avg  Best  Wrst StDev
> >   1.|-- 2603-8081-2340-2868-0215-17ff-fe94-6457.res6.spectrum.com 0.0%
>   10    3.6  19.1   1.5  93.2  36.1
> >   2.|-- 2603-90c5-0003-0180-0000-0000-0000-0001.inf6.spectrum.com 0.0%
>   10   14.5  36.6  11.3 171.2  50.0
> >   3.|-- lag-63.hcr02rdrktxaz.netops.charter.com 0.0%    10   18.8
> 37.3  12.0 143.9  45.3
> >   4.|-- lag-19.ausxtxir02r.netops.charter.com 60.0%    10   65.8  30.2
> 11.7  65.8  24.9
> >   5.|-- lag-22.rcr01hstqtx02.netops.charter.com 80.0%    10   26.5
> 25.5  24.5  26.5   1.4
> >   6.|-- lag-16.hstqtx0209w-bcr00.netops.charter.com 90.0%    10   25.7
> 25.7  25.7  25.7   0.0
> >   7.|-- lag-12.dllstx976iw-bcr00.netops.charter.com 40.0%    10   25.4
> 26.3  18.2  44.4   9.5
> >   8.|-- ??? 100.0    10    0.0   0.0   0.0   0.0   0.0
> >
> > IPv4 works however:
> >
> > > mtr -4 --report-wide cloudflare.com
> > Start: 2023-04-19T23:20:21+0000
> > HOST: defiant                                     Loss%   Snt Last
>  Avg  Best  Wrst StDev
> >   1.|-- _gateway                                     0.0%    10 2.1
>  1.8   1.4   2.1   0.2
> >   2.|-- cpe-70-114-160-1.austin.res.rr.com           0.0%    10 51.9
> 34.4  14.3 149.7  42.1
> >   3.|-- lag-63.hcr01rdrktxaz.netops.charter.com      0.0%    10 13.1
> 38.5  13.1 159.1  44.6
> >   4.|-- lag-19.ausutxla01r.netops.charter.com        0.0%    10 18.1
> 21.0  14.3  34.8   6.0
> >   5.|-- lag-22.rcr01dllatx37.netops.charter.com      0.0%    10 23.4
> 23.3  18.3  33.3   4.3
> >   6.|-- lag-14.dllstx976iw-bcr00.netops.charter.com  0.0%    10 19.8
> 27.0  16.1  51.2  11.9
> >   7.|-- lag-0.pr3.dfw10.netops.charter.com           0.0%    10 39.3
> 28.5  14.1  62.3  16.7
> >   8.|-- 141.101.74.104                              40.0%    10 53.2
> 44.3  19.4 120.2  39.2
> >   9.|-- 172.71.168.2                                 0.0%    10 28.3
> 28.8  10.8  79.4  19.5
> >  10.|-- 104.16.133.229                               0.0%    10 122.0
> 42.8  16.9 122.0  34.4
> >
> > It's kind of wild how many things don't fall back to IPv4 quickly (lots
> of Android TV apps) or at all (.NET). I tried reaching out to Spectrum
> support, but being a lowly consumer I was only told that "The modem doesn't
> have any filters" and that "the problem may be on the CloudFlare side",
> which was sadly what I predicted. So, I figured I would raise the issue
> here in the hopes that actual network people would see it.
> >
> >   -Carl
> >
> >
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