Spectrum networks IPv6 access issue

Tue May 2 18:43:29 UTC 2023

This has been “resolved", I finally got through to some awesome engineer at Spectrum who has rerouted traffic while they work with their hardware vendor (thanks Jake):

 1  2605:6000:0:8::f:7acc (2605:6000:0:8::f:7acc)  0.372 ms  0.323 ms  0.282 ms
 2  ae15.ARTNTXAF02H.chtrse.com (2605:6000:0:4::f:87e9)  4.002 ms  3.977 ms  10.884 ms
 3  * * *
 4  lag-23.mcr11dllbtxlb.netops.charter.com (2605:6000:0:4::2:1e)  1.464 ms  1.574 ms  1.560 ms
 5  * * *
 6  * *
    lag-26.hstqtx0209w-bcr00.netops.charter.com (2001:1998:0:4::528)  6.351 ms
 7  * * *
 8  lag-0.pr2.atl20.netops.charter.com (2001:1998:0:4::51f)  18.577 ms  18.572 ms  18.428 ms
 9  * * *
10  e0-36.core2.bna1.he.net (2001:470:0:429::2)  32.553 ms  32.720 ms  32.563 ms
11  * * *
12  * * *
13  equinix-ix.dfw2.packet.net (2001:504:0:5:0:5:4825:1)  24.591 ms  24.553 ms  24.604 ms
14  * * *
15  * * *
16  dfw.source.kernel.org (2604:1380:4641:c500::1)  24.423 ms  26.020 ms  24.415 ms

> On Apr 28, 2023, at 11:35 AM, Sam Thomas <sthomas at lart.net> wrote:
> 
> Actual data from a Spectrum residential customer in DFW.
> 
> First, IPv4:
> 
> <ns:~> trace dfw.source.kernel.org
> traceroute to dfw.source.kernel.org (139.178.84.217), 64 hops max, 40
> byte packets
> 1  my.router  0.389 ms  0.350 ms  0.292 ms
> 2  142-254-130-077.inf.spectrum.com (142.254.130.77)  8.423 ms  8.408
> ms  8.080 ms
> 3  lag-63.artrtx2801h.netops.charter.com (24.28.88.17)  27.167 ms
> 25.065 ms  21.977 ms
> 4  lag-22.artntxaf01r.netops.charter.com (24.175.49.233)  10.718 ms
> 10.083 ms  15.886 ms
> 5  lag-23.mcr11crtntxjt.netops.charter.com (24.175.36.224)  13.386 ms
> 11.560 ms  11.297 ms
> 6  lag-21.rcr01dllatx37.netops.charter.com (24.175.49.0)  11.339 ms
>    lag-28.rcr01dllatx37.netops.charter.com (24.175.33.246)  11.904 ms
> 128.186 ms
> 7  lag-414.dllstx976iw-bcr00.netops.charter.com (66.109.6.52)  12.603 ms
>    lag-14.dllstx976iw-bcr00.netops.charter.com (66.109.6.88)  12.172 ms
>    lag-414.dllstx976iw-bcr00.netops.charter.com (66.109.6.52)  12.299 ms
> 8  lag-302.pr3.dfw10.netops.charter.com (209.18.43.77)  21.570 ms
>    lag-0.pr3.dfw10.netops.charter.com (66.109.5.121)  11.763 ms
>    lag-302.pr3.dfw10.netops.charter.com (209.18.43.77)  12.182 ms
> 9  dls-b23-link.ip.twelve99.net (62.115.156.208)  11.515 ms *  11.706 ms
> 10  packethost-ic-369414.ip.twelve99-cust.net (213.248.72.3)  11.870
> ms  30.246 ms  18.199 ms
> 11  * * *
> 12  * * *
> 13  dfw.source.kernel.org (139.178.84.217)  12.021 ms  12.076 ms  11.922 ms
> 
> ping dfw.source.kernel.org
> PING dfw.source.kernel.org (139.178.84.217): 56 data bytes
> 64 bytes from 139.178.84.217: icmp_seq=0 ttl=50 time=11.590 ms
> 64 bytes from 139.178.84.217: icmp_seq=1 ttl=50 time=11.785 ms
> 
> IPv6:
> 
> <ns:~> trace6 dfw.source.kernel.org
> traceroute6 to dfw.source.kernel.org (2604:1380:4641:c500::1) from
> 2603:8080:REDACTED, 64 hops max, 20 byte packets
> 1  2603-8080-REDACTED.res6.spectrum.com  0.404 ms  0.340 ms  0.322 ms
> 2  2603-90c5-0003-000e-0000-0000-0000-0001.inf6.spectrum.com  10.308
> ms  7.901 ms  9.902 ms
> 3  lag-63.artrtx2801h.netops.charter.com  17.008 ms  10.523 ms  11.077 ms
> 4  lag-22.artntxaf01r.netops.charter.com  14.638 ms * *
> 5  lag-23.mcr11crtntxjt.netops.charter.com  11.090 ms  11.612 ms  12.234 ms
> 6  * * *
> 7  lag-414.dllstx976iw-bcr00.netops.charter.com  12.572 ms *
>    lag-24.dllstx976iw-bcr00.netops.charter.com  12.160 ms
> 8  * * *
> 9  * * *
> 10  * * *
> 11  * * *
> 12  * * *
> 13  * * *
> 14  * * *
> 15  * * *
> 16  * * *
> 17  * * *
> 18  * * *
> 19  *^C
> 
> ping6 dfw.source.kernel.org
> PING6(56=40+8+8 bytes) 2603:8080:REDACTED --> 2604:1380:4641:c500::1
> ^C
> --- dfw.source.kernel.org ping6 statistics ---
> 5 packets transmitted, 0 packets received, 100.0% packet loss
> 
> I have a Linode VM in Dallas that I also can't get to via IPv6.
> Traffic appears to take the same path for IPv4.
> 
> On Wed, Apr 26, 2023 at 10:50 AM Tom Rini <trini at konsulko.com> wrote:
>> 
>> Hey all,
>> 
>> I'm posting this here in hopes of getting the attention of someone that
>> can get this issue resolved, or at least an internal ticket filed. I've
>> tried the customer-facing tech support and not been able to get such a
>> thing done.
>> 
>> In short, from within Spectrum's US IPv6 network (verified in both North
>> Carolina and Ohio), dfw.source.kernel.org (2604:1380:4641:c500::1) is
>> unreachable and connections time out. This site is otherwise fine and
>> globally accessible via IPv6, tested on both Qwest and T-Mobile hosted
>> systems.  This is a regression from some time in early April this year.
>> 
>> --
>> Tom

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