I would be opening a ticket with comcast. This appears to be off charter as it is a individual home user issue.
> On 26 Aug 2024, at 10:15, Crist Clark <cjc+na...@pumpky.net> wrote: > > Debated whether to bring this up on the OARC DNS Ops list or NANOG. Seem more > of a network-y thing. > > I happened to notice that I cannot query or ping m.root-servers.net's IPv4 > address from my home Comcast connection (SF Bay Area). IPv6 works. All of the > other root servers are reachable via both IPv4 and IPv6. > > Just me or all Comcast users? > > Obviously, nothing critical. My DNS servers will work just fine with one root > unavailable on one protocol. But curious what's broken. Been this way for at > least a couple of weeks. > > Compare IPv4 and IPv6 traceroutes, > > Mac-Air:~ fred$ traceroute -I m.root-servers.net > traceroute to m.root-servers.net (202.12.27.33), 64 hops max, 72 byte packets > 1 moat (192.168.64.90) 3.004 ms 1.409 ms 1.155 ms > 2 10.60.234.131 (10.60.234.131) 14.354 ms 17.153 ms 14.451 ms > 3 po-313-1222-rur202.pleasanton.ca.sfba.comcast.net (96.110.179.157) > 14.296 ms 11.150 ms 11.279 ms > 4 po-200-xar02.pleasanton.ca.sfba.comcast.net (68.85.155.117) 11.752 ms > 10.195 ms 11.783 ms > 5 be-248-rar01.pleasanton.ca.sfba.comcast.net (96.108.99.129) 14.261 ms > 11.228 ms 13.187 ms > 6 be-398-ar01.hayward.ca.sfba.comcast.net (162.151.87.225) 13.577 ms > 13.552 ms 13.725 ms > 7 * * * > 8 * * * > 9 * * * > 10 * * * > 11 * * * > 12 *^C > Mac-Air:~ fred$ traceroute6 -I m.root-servers.net > traceroute6 to m.root-servers.net (2001:dc3::35) from > 2601:644:8f01:3b0:c842:51d6:e589:5203, 64 hops max, 16 byte packets > 1 2601:644:8f01:3b0:4262:31ff:fe01:b8 1.753 ms 1.765 ms 1.343 ms > 2 2001:558:101e:54::2 14.526 ms 26.113 ms 32.365 ms > 3 po-313-1221-rur201.pleasanton.ca.sfba.comcast.net 28.170 ms 14.109 ms > 11.374 ms > 4 po-200-xar01.pleasanton.ca.sfba.comcast.net 11.746 ms 20.031 ms 42.526 > ms > 5 * * * > 6 * * * > 7 * * * > 8 lo-0-v6.ear2.sanjose1.level3.net 15.106 ms 14.454 ms 13.240 ms > 9 pt.telekomu.edge1.losangeles9.level3.net 15.921 ms 17.188 ms 16.294 ms > 10 m.root-servers.net 17.032 ms 15.169 ms 14.892 ms > > -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
