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Hermes SMTP Server) with ESMTPA ID c1c82fa307f3cf7d85b42bad5ff9548f; Sun, 01 May 2022 19:58:47 +0000 (UTC) Content-Type: text/plain; charset=us-ascii List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.13\)) Subject: Re: 60+% ping packet loss on Pi3 under -current and stable-13 From: Mark Millard In-Reply-To: Date: Sun, 1 May 2022 12:58:45 -0700 Cc: Bakul Shah , freebsd-net@freebsd.org, freebsd-arm@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: References: <20220314010330.GA70447@www.zefox.net> <9FA3F874-2987-44A2-A987-F905E78CCA65@yahoo.com> <20220428023226.GA5666@www.zefox.net> <8A57B411-AA06-47F4-935D-EDF45D8DF0EC@yahoo.com> <70C2DF4B-D08B-491D-B7B5-1EAD0D1BF0E3@yahoo.com> <20220429005206.GA1171@www.zefox.net> <20220430021207.GA7600@www.zefox.net> <20220501181254.GA14961@www.zefox.net> To: bob prohaska X-Mailer: Apple Mail (2.3654.120.0.1.13) X-Rspamd-Queue-Id: 4Krxr435ckz3nFn X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=yahoo.com header.s=s2048 header.b="IoDQ/FVx"; dmarc=pass (policy=reject) header.from=yahoo.com; spf=pass (mx1.freebsd.org: domain of marklmi@yahoo.com designates 98.137.64.206 as permitted sender) smtp.mailfrom=marklmi@yahoo.com X-Spamd-Result: default: False [-3.49 / 15.00]; RCVD_TLS_LAST(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[yahoo.com:s=s2048]; NEURAL_HAM_MEDIUM(-1.00)[-0.996]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; FREEMAIL_FROM(0.00)[yahoo.com]; MV_CASE(0.50)[]; MIME_GOOD(-0.10)[text/plain]; R_SPF_ALLOW(-0.20)[+ptr:yahoo.com]; NEURAL_HAM_LONG(-1.00)[-1.000]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[yahoo.com:+]; DMARC_POLICY_ALLOW(-0.50)[yahoo.com,reject]; RCVD_IN_DNSWL_NONE(0.00)[98.137.64.206:from]; NEURAL_HAM_SHORT(-1.00)[-0.997]; MLMMJ_DEST(0.00)[freebsd-net]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[yahoo.com]; ASN(0.00)[asn:36647, ipnet:98.137.64.0/20, country:US]; RCVD_COUNT_TWO(0.00)[2]; MID_RHS_MATCH_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[yahoo.com:dkim] X-ThisMailContainsUnwantedMimeParts: N On 2022-May-1, at 12:15, Mark Millard wrote: > On 2022-May-1, at 11:12, bob prohaska wrote: >=20 >> On Sat, Apr 30, 2022 at 06:39:57PM -0700, Bakul Shah wrote: >>> On Apr 29, 2022, at 7:12 PM, bob prohaska = wrote: >>>>=20 >>>> Since about December of 2021 I've been noticing problems with >>>> wired network connectivity on a pair of raspberry pi 3 machines >>>> using wired network connections. One runs stable-13.1, the other >>>> runs -current, both are up to date as of a few days ago. >>>>=20 >>>> Essentially both machines fail to respond to inbound network >>>> connections via ssh or ping after reboot. If I get on the=20 >>>> serial console and start an outbound ping to anywhere, both >>>> machines respond to incoming pings with about a 65% packet >>>> loss.=20 >>=20 >>> Suggest running tcpdump on the rpi3 to see what is going on >>> when connected to the public vs private net.=20 >>>=20 >>=20 >> Public net first, since that's where the machine is now. = Gateway.zefox.net >> is the name of my router's public interface, dcn.org belongs to my = isp and >> fusionbroadband is their service provider.. >>=20 >> While on the -current Pi3 serial console (with no outbound ping = running)=20 >> and no inbound traffic from my hosts I see after a couple minutes: >>=20 >> root@www:/mnt # tcpdump >> tcpdump: verbose output suppressed, use -v or -vv for full protocol = decode >> listening on ue0, link-type EN10MB (Ethernet), capture size 262144 = bytes >> 10:39:40.887853 ARP, Request who-has www.zefox.org tell = gateway.zefox.net, length 46 >> 10:39:40.887929 ARP, Reply www.zefox.org is-at b8:27:eb:71:46:4e (oui = Unknown), length 28 >> 10:39:40.893220 ARP, Request who-has = 50-1-20-1.dsl.static.fusionbroadband.com tell www.zefox.org, length 28 >> 10:39:40.915469 ARP, Reply 50-1-20-1.dsl.static.fusionbroadband.com = is-at 00:1b:90:d2:4a:c4 (oui Unknown), length 50 >> 10:39:40.915529 IP www.zefox.org.50714 > = spoke.dcn.davis.ca.us.domain: 51409+ PTR? 28.20.1.50.in-addr.arpa. (41) >> 10:39:40.943602 IP spoke.dcn.davis.ca.us.domain > = www.zefox.org.50714: 51409 1/3/6 PTR www.zefox.org. (265) >> 10:39:40.945416 IP www.zefox.org.15986 > = spoke.dcn.davis.ca.us.domain: 44966+ PTR? 31.20.1.50.in-addr.arpa. (41) >> 10:39:40.973487 IP spoke.dcn.davis.ca.us.domain > = www.zefox.org.15986: 44966 1/3/6 PTR gateway.zefox.net. (266) >> 10:39:40.975037 IP www.zefox.org.57611 > = spoke.dcn.davis.ca.us.domain: 31749+ PTR? 1.20.1.50.in-addr.arpa. (40) >> 10:39:46.288219 IP www.zefox.org.49710 > = wheel.dcn.davis.ca.us.domain: 31749+ PTR? 1.20.1.50.in-addr.arpa. (40) >> 10:39:46.316239 IP wheel.dcn.davis.ca.us.domain > = www.zefox.org.49710: 31749 1/3/6 PTR = 50-1-20-1.dsl.static.fusionbroadband.com. (291) >> 10:39:46.318267 IP www.zefox.org.17061 > = spoke.dcn.davis.ca.us.domain: 37579+ PTR? 2.253.150.168.in-addr.arpa. = (44) >> 10:39:46.346851 IP spoke.dcn.davis.ca.us.domain > = www.zefox.org.17061: 37579* 1/2/2 PTR spoke.dcn.davis.ca.us. (145) >> 10:39:46.348674 IP www.zefox.org.40440 > = spoke.dcn.davis.ca.us.domain: 20572+ PTR? 1.253.150.168.in-addr.arpa. = (44) >> 10:39:51.420705 IP www.zefox.org.64019 > = wheel.dcn.davis.ca.us.domain: 20572+ PTR? 1.253.150.168.in-addr.arpa. = (44) >> 10:39:51.448850 IP wheel.dcn.davis.ca.us.domain > = www.zefox.org.64019: 20572* 1/2/2 PTR wheel.dcn.davis.ca.us. (145) >> 10:40:40.147603 ARP, Request who-has = 50-1-20-1.dsl.static.fusionbroadband.com tell ns1.zefox.net, length 46 >> 10:40:40.148844 IP www.zefox.org.46127 > = spoke.dcn.davis.ca.us.domain: 12186+ PTR? 29.20.1.50.in-addr.arpa. (41) >> 10:40:40.176486 IP spoke.dcn.davis.ca.us.domain > = www.zefox.org.46127: 12186 1/3/6 PTR ns1.zefox.net. (262) >> 10:40:57.688225 ARP, Request who-has www.zefox.org tell = gateway.zefox.net, length 46 >> 10:40:57.688305 ARP, Reply www.zefox.org is-at b8:27:eb:71:46:4e (oui = Unknown), length 28 >> 10:42:14.488727 ARP, Request who-has www.zefox.org tell = gateway.zefox.net, length 46 >> 10:42:14.488804 ARP, Reply www.zefox.org is-at b8:27:eb:71:46:4e (oui = Unknown), length 28 >> 10:42:43.761226 ARP, Request who-has = 50-1-20-1.dsl.static.fusionbroadband.com tell www.zefox.com, length 46 >> 10:42:43.762522 IP www.zefox.org.56181 > = spoke.dcn.davis.ca.us.domain: 28779+ PTR? 26.20.1.50.in-addr.arpa. (41) >> 10:42:43.790361 IP spoke.dcn.davis.ca.us.domain > = www.zefox.org.56181: 28779 1/3/6 PTR www.zefox.com. (265) >> 10:43:31.289103 ARP, Request who-has www.zefox.org tell = gateway.zefox.net, length 46 >> 10:43:31.289181 ARP, Reply www.zefox.org is-at b8:27:eb:71:46:4e (oui = Unknown), length 28 >>=20 >> If I now start an inbound ping from one of my hosts it gets no reply = and=20 >> tcpdump reports no additional traffic. With an outbound ping running = there's >> at least a sparse reply. >>=20 >> ^C >> 28 packets captured >> 28 packets received by filter >> 0 packets dropped by kernel >> root@www:/mnt #=20 >>=20 >> The "oui unknown" looks like some sort of failure..... >> Can you ping www.zefox.org? I have no outside vantage point. >> There is still no outbound ping running and I would expect >> you'll get no or very sparse reply.=20 >>=20 >>=20 >> Thus far only the two Pi3s suffer from connectivity problems; Pi2s = and a Pi4 have >> no difficulty on the same address block. Is there a switch for = tcpdump that will >> limit records to relevant traffic? Otherwise it's a flood. >>=20 >> These results were obtained after standing idle overnight and >> are rather different (in ways I don't understand) from behavior >> immediately after reboot, I'll have to repeat as I learn more. >=20 > I wonder if there is a notable difference between > monitoring traffic from 2 places: >=20 > A) from the machine seeing the problem > vs. > B) from a machine not having problems but > connected were all the traffic would be > on the wire it is connected to. >=20 > It may be that monitoring from both and > comparing/contrasting the reported traffic > from the two provides additional evidence. >=20 > There may be modes of monitoring that are > relevant for this. But I'm not familiar > with any detail here. >=20 >=20 > For reference: >=20 > # ping www.zefox.org > PING www.zefox.org (50.1.20.28): 56 data bytes > ^C > --- www.zefox.org ping statistics --- > 32 packets transmitted, 0 packets received, 100.0% packet loss >=20 > I found the command traceroute and it reports: >=20 > # traceroute www.zefox.org > traceroute to www.zefox.org (50.1.20.28), 64 hops max, 40 byte packets > 1 192.168.1.1 (192.168.1.1) 0.697 ms 0.486 ms 1.277 ms > 2 172.30.26.66 (172.30.26.66) 30.019 ms > 172.30.26.67 (172.30.26.67) 41.720 ms > 172.30.26.66 (172.30.26.66) 28.645 ms > 3 68.85.243.125 (68.85.243.125) 8.967 ms > 68.85.243.77 (68.85.243.77) 11.462 ms > 68.85.243.125 (68.85.243.125) 10.254 ms > 4 24.124.129.106 (24.124.129.106) 7.510 ms > 96.216.60.165 (96.216.60.165) 10.176 ms > 24.124.129.106 (24.124.129.106) 8.945 ms > 5 68.85.243.197 (68.85.243.197) 10.837 ms > 96.216.60.165 (96.216.60.165) 10.252 ms > 68.85.243.197 (68.85.243.197) 16.036 ms > 6 68.85.243.197 (68.85.243.197) 14.660 ms > be-36211-cs01.seattle.wa.ibone.comcast.net (68.86.93.49) 14.629 ms > 68.85.243.197 (68.85.243.197) 8.849 ms > 7 be-2412-pe12.seattle.wa.ibone.comcast.net (96.110.34.142) 14.607 = ms > be-36221-cs02.seattle.wa.ibone.comcast.net (68.86.93.53) 14.122 ms > be-2212-pe12.seattle.wa.ibone.comcast.net (96.110.34.134) 13.877 = ms > 8 be-2412-pe12.seattle.wa.ibone.comcast.net (96.110.34.142) 14.133 = ms * 13.663 ms > 9 be2075.ccr21.sfo01.atlas.cogentco.com (154.54.0.233) 30.176 ms * > be3717.ccr22.sfo01.atlas.cogentco.com (154.54.86.209) 29.002 ms > 10 be3717.ccr22.sfo01.atlas.cogentco.com (154.54.86.209) 28.477 ms > be2430.ccr31.sjc04.atlas.cogentco.com (154.54.88.186) 27.203 ms > be2075.ccr21.sfo01.atlas.cogentco.com (154.54.0.233) 28.515 ms > 11 38.104.141.82 (38.104.141.82) 29.820 ms > be2430.ccr31.sjc04.atlas.cogentco.com (154.54.88.186) 28.605 ms > 38.104.141.82 (38.104.141.82) 33.735 ms > 12 38.104.141.82 (38.104.141.82) 27.160 ms > 0.xe-0-3-0.scrm-gw1.scrmca01.sonic.net (135.180.179.146) 32.336 ms > 38.104.141.82 (38.104.141.82) 31.867 ms > 13 0.xe-0-0-0.cr1.scrmca13.sonic.net (135.180.179.166) 31.761 ms > 0.xe-0-3-0.scrm-gw1.scrmca01.sonic.net (135.180.179.146) 29.864 ms > 0.xe-0-0-0.cr1.scrmca13.sonic.net (135.180.179.166) 31.711 ms > 14 0.xe-0-0-0.cr1.scrmca13.sonic.net (135.180.179.166) 30.373 ms > gig1-1-1.gw.wscrca11.sonic.net (50.1.36.106) 35.567 ms > 0.xe-0-0-0.cr1.scrmca13.sonic.net (135.180.179.166) 31.146 ms > 15 gig1-1-1.gw.davsca11.sonic.net (50.1.36.110) 31.513 ms > gig1-1-1.gw.wscrca11.sonic.net (50.1.36.106) 31.203 ms > gig1-1-1.gw.davsca11.sonic.net (50.1.36.110) 31.354 ms > 16 gig1-1-1.gw.davsca11.sonic.net (50.1.36.110) 30.125 ms * 31.996 = ms > 17 * * * > 18 * * * > 19 * * * > 20 * * * > 21 * * * > 22 * * * > 23 * * * > 24 * * * > 25 * * * > 26 * * * > 27 * * * > 28 * * * > 29 * * * > 30 * * * > ^C >=20 > (There did not seem to be much point in having it continue.) I found and built a port called net/mtr-nox11 ("My traceroute") and tried it, letting it just run. The initial try eventually got a connection but reported a 99.2% packet loss as of when I captured the below: My traceroute [v0.95] amd64_ZFS (192.168.1.120) -> www.zefox.org (50.1.20.28) = 2022-05-01T12:40:22-0700 Keys: Help Display mode Restart statistics Order of fields quit Packets = Pings Host Loss% Snt Last Avg = Best Wrst StDev 1. 192.168.1.1 0.0% 135 0.4 0.8 = 0.1 3.1 0.4 2. 172.30.26.66 0.0% 134 28.2 26.1 = 9.3 132.7 18.1 3. 68.85.243.77 0.0% 134 8.6 9.0 = 7.5 11.2 0.8 4. 24.124.129.106 0.0% 134 10.2 9.1 = 7.6 13.4 0.9 5. 96.216.60.165 0.0% 134 9.0 9.1 = 7.8 14.3 0.9 6. 68.85.243.197 0.0% 134 14.4 13.6 = 9.2 44.3 5.4 7. be-36241-cs04.seattle.wa.ibone.comcast.net 0.0% 134 16.8 14.9 = 13.0 22.6 1.1 8. be-2412-pe12.seattle.wa.ibone.comcast.net 0.0% 134 13.5 15.0 = 12.8 46.4 3.2 9. (waiting for reply) 10. be2075.ccr21.sfo01.atlas.cogentco.com 0.0% 134 29.3 29.0 = 26.7 54.1 2.9 11. be2379.ccr31.sjc04.atlas.cogentco.com 0.0% 134 28.0 28.7 = 27.1 40.3 1.3 12. 38.104.141.82 0.0% 134 28.0 33.8 = 26.6 114.8 16.5 13. 0.xe-0-3-0.scrm-gw1.scrmca01.sonic.net 0.0% 134 30.9 31.0 = 29.0 33.7 0.8 14. 0.xe-0-0-0.cr1.scrmca13.sonic.net 0.0% 134 31.1 32.3 = 29.3 93.2 6.7 15. gig1-1-1.gw.wscrca11.sonic.net 0.0% 134 31.3 34.9 = 29.5 330.4 26.5 16. gig1-1-1.gw.davsca11.sonic.net 0.0% 134 32.8 32.1 = 29.9 44.1 1.7 17. (waiting for reply) 18. (waiting for reply) 19. www.zefox.org 99.2% 134 74.9 74.9 = 74.9 74.9 0.0 I stopped and restarted it and so far no connection -- waiting even longer than that first time: Snt is now over 600. Rows 18 and 19 have not shown up, the last is 17. . . . (some more time goes by) . . . I have now stopped it, avoiding the extra load on the machines and network. Looks like there is some problem getting past gig1-1-1.gw.davsca11.sonic.net . =3D=3D=3D Mark Millard marklmi at yahoo.com