CNG3 dropping IPv4 packets in blocks but not IPv6 packets. IPv4 almost unusable now.

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I Plan to Stick Around
Posts: 56

CNG3 dropping IPv4 packets in blocks but not IPv6 packets. IPv4 almost unusable now.

I think, that since IPv6 became available on my service, that the CNG3 (details below) has introduced a regular pattern of IPv4 packet loss.  However, a ping6 to www.google.com shows no sign of the same stalls and carries on regardless from the same Linux system. It's almost as if the CNG3's IPv4 stack is resetting every so often...

 

Anyone else seen this?

 

System information
This menu displays general information of the device
HW Version	1A
SW Version	4.2.4.6
Serial Number	xxxxxxxxxxx
RF MAC	84:94:8c:xx:xx:xx
System Time	Wed, 27 Apr 2016 14:04:38
Time Zone	UTC-05:00 Colombia, Eastern Time, Indiana(East)
LAN Up Time	001 days 01h:30m:29s
WAN IP	174.113.xxx.xxx/23 , 2607:f798:xxx:xxx:xxxx:xxx:xxxx:xxxx/64
WAN Receiving	4.20G Bytes
WAN Sending	337.09M Bytes
Private LAN IP Address	192.168.0.1/24
LAN Receiving	456.61M Bytes
LAN Sending	4.33G Bytes
WAN Up Time	001 days 01h:24m:13s

Here's an example ping that shows the problem, with the lost blocks identified...

$ ping -D -O www.google.com
PING www.google.com (172.217.2.36) 56(84) bytes of data.
[1461781260.390195] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=1 ttl=49 time=77.7 ms
[1461781261.225628] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=2 ttl=49 time=73.5 ms
[1461781262.226038] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=3 ttl=49 time=72.4 ms
[1461781263.241260] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=4 ttl=49 time=86.8 ms
[1461781264.236423] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=5 ttl=49 time=81.3 ms
[1461781265.237451] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=6 ttl=49 time=80.0 ms
[1461781266.236587] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=7 ttl=49 time=77.0 ms
[1461781267.246047] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=8 ttl=49 time=84.5 ms
[1461781268.235347] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=9 ttl=49 time=71.9 ms
[1461781269.246703] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=10 ttl=49 time=81.5 ms
[1461781270.245804] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=11 ttl=49 time=76.9 ms
[1461781271.255676] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=12 ttl=49 time=85.7 ms
[1461781272.245620] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=13 ttl=49 time=73.0 ms
[1461781273.255803] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=14 ttl=49 time=82.0 ms
[1461781274.255854] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=15 ttl=49 time=81.0 ms
[1461781275.254552] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=16 ttl=49 time=79.1 ms
[1461781277.177327] no answer yet for icmp_seq=17
[1461781278.181789] no answer yet for icmp_seq=18
[1461781279.183756] no answer yet for icmp_seq=19
[1461781280.183342] no answer yet for icmp_seq=20
[1461781281.188290] no answer yet for icmp_seq=21
[1461781282.189045] no answer yet for icmp_seq=22
[1461781283.190006] no answer yet for icmp_seq=23
[1461781283.275146] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=24 ttl=49 time=85.0 ms
[1461781284.266332] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=25 ttl=49 time=74.6 ms
[1461781285.274764] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=26 ttl=49 time=80.2 ms
[1461781286.274858] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=27 ttl=49 time=79.1 ms
[1461781287.275701] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=28 ttl=49 time=78.2 ms
[1461781288.274953] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=29 ttl=49 time=75.9 ms
[1461781289.272072] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=30 ttl=49 time=71.9 ms
[1461781290.273394] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=31 ttl=49 time=72.1 ms
[1461781291.284937] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=32 ttl=49 time=81.4 ms
[1461781292.337429] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=33 ttl=49 time=132 ms
[1461781293.279578] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=34 ttl=49 time=72.0 ms
[1461781294.281077] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=35 ttl=49 time=72.4 ms
[1461781295.296082] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=36 ttl=49 time=85.8 ms
[1461781296.283054] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=37 ttl=49 time=70.2 ms
[1461781297.296206] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=38 ttl=49 time=82.0 ms
[1461781298.286118] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=39 ttl=49 time=70.5 ms
[1461781299.326317] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=40 ttl=49 time=107 ms
[1461781300.306022] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=41 ttl=49 time=85.3 ms
[1461781301.296578] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=42 ttl=49 time=74.3 ms
[1461781302.297768] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=43 ttl=49 time=73.2 ms
[1461781303.298534] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=44 ttl=49 time=71.6 ms
[1461781304.300446] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=45 ttl=49 time=71.8 ms
[1461781305.301833] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=46 ttl=49 time=70.7 ms
[1461781306.318589] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=47 ttl=49 time=85.4 ms
[1461781307.320523] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=48 ttl=49 time=86.9 ms
[1461781308.314639] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=49 ttl=49 time=75.6 ms
[1461781310.240856] no answer yet for icmp_seq=50
[1461781311.245553] no answer yet for icmp_seq=51
[1461781312.246253] no answer yet for icmp_seq=52
[1461781313.246915] no answer yet for icmp_seq=53
[1461781314.247029] no answer yet for icmp_seq=54
[1461781315.246284] no answer yet for icmp_seq=55
[1461781316.246360] no answer yet for icmp_seq=56
[1461781317.248340] no answer yet for icmp_seq=57
[1461781317.319346] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=58 ttl=49 time=70.8 ms
[1461781318.320282] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=59 ttl=49 time=70.6 ms
[1461781319.335993] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=60 ttl=49 time=84.3 ms
[1461781320.333956] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=61 ttl=49 time=80.0 ms
[1461781321.334678] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=62 ttl=49 time=78.7 ms
[1461781322.329848] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=63 ttl=49 time=71.6 ms
[1461781323.336767] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=64 ttl=49 time=77.7 ms
[1461781324.333429] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=65 ttl=49 time=72.1 ms
[1461781325.364513] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=66 ttl=49 time=101 ms
[1461781326.338389] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=67 ttl=49 time=72.1 ms
[1461781327.343664] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=68 ttl=49 time=75.3 ms
[1461781328.340226] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=69 ttl=49 time=70.6 ms
[1461781329.362349] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=70 ttl=49 time=91.0 ms
[1461781330.350358] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=71 ttl=49 time=76.7 ms
[1461781331.354914] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=72 ttl=49 time=76.8 ms
[1461781332.382036] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=73 ttl=49 time=102 ms
[1461781333.364106] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=74 ttl=49 time=82.1 ms
[1461781334.352865] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=75 ttl=49 time=69.6 ms
[1461781335.364277] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=76 ttl=49 time=79.2 ms
[1461781336.375961] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=77 ttl=49 time=89.5 ms
[1461781337.366571] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=78 ttl=49 time=78.5 ms
[1461781338.359681] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=79 ttl=49 time=69.9 ms
[1461781339.372781] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=80 ttl=49 time=81.3 ms
[1461781340.376036] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=81 ttl=49 time=81.8 ms
[1461781342.295306] no answer yet for icmp_seq=82
[1461781343.296660] no answer yet for icmp_seq=83
[1461781344.297143] no answer yet for icmp_seq=84
[1461781345.297278] no answer yet for icmp_seq=85
[1461781346.298747] no answer yet for icmp_seq=86
[1461781347.299356] no answer yet for icmp_seq=87
[1461781348.300053] no answer yet for icmp_seq=88
[1461781349.299323] no answer yet for icmp_seq=89
[1461781350.299280] no answer yet for icmp_seq=90
[1461781351.299279] no answer yet for icmp_seq=91
[1461781352.300114] no answer yet for icmp_seq=92
[1461781352.373741] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=93 ttl=49 time=73.4 ms
[1461781353.392465] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=94 ttl=49 time=90.4 ms
[1461781354.388396] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=95 ttl=49 time=83.9 ms
[1461781355.385325] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=96 ttl=49 time=79.7 ms
[1461781356.393269] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=97 ttl=49 time=84.9 ms
[1461781357.392918] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=98 ttl=49 time=80.7 ms
[1461781358.397066] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=99 ttl=49 time=81.8 ms
[1461781359.390590] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=100 ttl=49 time=74.1 ms
[1461781360.393239] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=101 ttl=49 time=74.7 ms
[1461781361.403543] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=102 ttl=49 time=82.3 ms
[1461781362.404971] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=103 ttl=49 time=81.8 ms
[1461781363.401500] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=104 ttl=49 time=76.5 ms
[1461781364.403944] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=105 ttl=49 time=76.4 ms
[1461781365.458067] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=106 ttl=49 time=128 ms
[1461781366.413480] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=107 ttl=49 time=82.4 ms
[1461781367.416321] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=108 ttl=49 time=82.7 ms
[1461781368.440598] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=109 ttl=49 time=105 ms
[1461781369.415197] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=110 ttl=49 time=78.3 ms
[1461781370.414505] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=111 ttl=49 time=75.4 ms
[1461781371.413990] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=112 ttl=49 time=74.4 ms
[1461781372.424442] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=113 ttl=49 time=81.6 ms
[1461781373.424675] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=114 ttl=49 time=80.1 ms
[1461781375.345267] no answer yet for icmp_seq=115
[1461781376.345281] no answer yet for icmp_seq=116
[1461781377.345937] no answer yet for icmp_seq=117
[1461781378.345442] no answer yet for icmp_seq=118
[1461781379.345366] no answer yet for icmp_seq=119
[1461781380.345272] no answer yet for icmp_seq=120
[1461781381.346514] no answer yet for icmp_seq=121
[1461781382.349080] no answer yet for icmp_seq=122
[1461781382.423376] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=123 ttl=49 time=74.1 ms
[1461781383.434792] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=124 ttl=49 time=84.2 ms
[1461781384.434502] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=125 ttl=49 time=82.3 ms
[1461781385.443250] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=126 ttl=49 time=88.8 ms
[1461781386.432277] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=127 ttl=49 time=76.2 ms
[1461781387.435485] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=128 ttl=49 time=76.6 ms
[1461781388.432333] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=129 ttl=49 time=72.6 ms
[1461781389.452108] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=130 ttl=49 time=89.2 ms
[1461781390.455608] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=131 ttl=49 time=91.3 ms
[1461781391.443056] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=132 ttl=49 time=77.2 ms
[1461781392.441650] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=133 ttl=49 time=74.0 ms
[1461781393.454451] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=134 ttl=49 time=82.7 ms
[1461781394.455951] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=135 ttl=49 time=82.2 ms
[1461781395.455195] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=136 ttl=49 time=79.1 ms
[1461781396.452446] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=137 ttl=49 time=74.7 ms
[1461781397.463228] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=138 ttl=49 time=84.5 ms
[1461781398.464107] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=139 ttl=49 time=82.2 ms
[1461781399.467041] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=140 ttl=49 time=84.7 ms
[1461781400.462556] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=141 ttl=49 time=78.3 ms
[1461781401.482535] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=142 ttl=49 time=96.6 ms
[1461781402.462382] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=143 ttl=49 time=74.6 ms
[1461781403.466279] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=144 ttl=49 time=76.0 ms
[1461781404.495354] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=145 ttl=49 time=103 ms
[1461781405.483136] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=146 ttl=49 time=90.1 ms
[1461781406.472458] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=147 ttl=49 time=77.9 ms
[1461781408.395285] no answer yet for icmp_seq=148
[1461781409.399787] no answer yet for icmp_seq=149
[1461781410.400029] no answer yet for icmp_seq=150
[1461781411.400419] no answer yet for icmp_seq=151
[1461781412.400325] no answer yet for icmp_seq=152
[1461781413.403560] no answer yet for icmp_seq=153
[1461781414.404285] no answer yet for icmp_seq=154
[1461781415.405531] no answer yet for icmp_seq=155
[1461781415.490371] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=156 ttl=49 time=83.3 ms
[1461781416.480371] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=157 ttl=49 time=73.1 ms
[1461781417.489337] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=158 ttl=49 time=80.2 ms
[1461781418.485432] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=159 ttl=49 time=73.8 ms
[1461781419.512881] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=160 ttl=49 time=98.3 ms
[1461781420.493348] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=161 ttl=49 time=77.1 ms
[1461781421.524085] 64 bytes from nuq05s02-in-f4.1e100.net (172.217.2.36): icmp_seq=162 ttl=49 time=106 ms
^C
--- www.google.com ping statistics ---
162 packets transmitted, 120 received, 25% packet loss, time 161269ms
rtt min/avg/max/mdev = 69.635/81.136/132.148/10.282 ms

 I stand corrected. The stall DOES happen with IPv6 BUT it doesn't discard the packets and I get zero loss reported. This can be seen at timestamps [1461782835.039716] and [1461782867.242687] in the following example.

# ping6 -D -O  www.google.com
PING www.google.com(nuq05s02-in-x04.1e100.net) 56 data bytes
[1461782815.062180] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=1 ttl=50 time=84.1 ms
[1461782816.043252] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=2 ttl=50 time=69.3 ms
[1461782817.051883] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=3 ttl=50 time=71.7 ms
[1461782818.071989] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=4 ttl=50 time=69.5 ms
[1461782819.041520] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=5 ttl=50 time=70.6 ms
[1461782820.057487] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=6 ttl=50 time=72.1 ms
[1461782821.044598] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=7 ttl=50 time=70.1 ms
[1461782822.044704] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=8 ttl=50 time=69.8 ms
[1461782823.044619] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=9 ttl=50 time=70.0 ms
[1461782824.047367] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=10 ttl=50 time=71.7 ms
[1461782825.046905] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=11 ttl=50 time=71.9 ms
[1461782826.049793] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=12 ttl=50 time=71.7 ms
[1461782835.039716] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=13 ttl=50 time=79.4 ms
[1461782835.319559] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=14 ttl=50 time=183 ms
[1461782836.200206] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=15 ttl=50 time=81.7 ms
[1461782837.190971] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=16 ttl=50 time=71.0 ms
[1461782838.194798] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=17 ttl=50 time=73.0 ms
[1461782839.201155] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=18 ttl=50 time=75.8 ms
[1461782840.211991] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=19 ttl=50 time=82.2 ms
[1461782841.201603] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=20 ttl=50 time=73.1 ms
[1461782842.203524] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=21 ttl=50 time=75.1 ms
[1461782843.203598] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=22 ttl=50 time=71.3 ms
[1461782844.208886] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=23 ttl=50 time=76.0 ms
[1461782845.205641] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=24 ttl=50 time=70.1 ms
[1461782846.220099] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=25 ttl=50 time=80.0 ms
[1461782847.216991] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=26 ttl=50 time=72.2 ms
[1461782848.217848] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=27 ttl=50 time=78.6 ms
[1461782849.216927] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=28 ttl=50 time=76.3 ms
[1461782850.219437] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=29 ttl=50 time=76.0 ms
[1461782851.215013] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=30 ttl=50 time=69.7 ms
[1461782852.214971] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=31 ttl=50 time=68.8 ms
[1461782853.217110] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=32 ttl=50 time=69.8 ms
[1461782854.223185] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=33 ttl=50 time=72.8 ms
[1461782855.231282] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=34 ttl=50 time=71.7 ms
[1461782856.221158] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=35 ttl=50 time=68.8 ms
[1461782857.223302] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=36 ttl=50 time=70.9 ms
[1461782858.248552] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=37 ttl=50 time=70.6 ms
[1461782867.242687] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=38 ttl=50 time=78.8 ms
[1461782867.414483] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=39 ttl=50 time=86.5 ms
[1461782868.397517] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=40 ttl=50 time=77.6 ms
[1461782869.480032] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=41 ttl=50 time=157 ms
[1461782870.393759] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=42 ttl=50 time=72.9 ms
[1461782871.409801] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=43 ttl=50 time=85.9 ms
[1461782872.395303] 64 bytes from nuq05s02-in-x04.1e100.net: icmp_seq=44 ttl=50 time=72.6 ms
^C
--- www.google.com ping statistics ---
44 packets transmitted, 44 received, 0% packet loss, time 57355ms
rtt min/avg/max/mdev = 68.888/78.526/183.630/20.810 ms

***Edited Labels*** 

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I Plan to Stick Around
Posts: 56

Re: CNG3 dropping IPv4 packets in blocks but not IPv6 packets. IPv4 almost unusable now.

After a mass of debugging the network and even replacing the CNG3 with a new CGN3ACSMR the problem was found to be a Netgear WN2500RP range extender that was effectively poisoning the whole of the CNG3 networking stack. As soon as that was removed from service, the problem vanished. The firmware on the WN2500RP has recently been updated to V1.0.0.30_1.0.58, but I'm not convinced that was the cause, so I include the info here for refernce only.

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Resident Expert
Posts: 7,012

Re: CNG3 dropping IPv4 packets in blocks but not IPv6 packets. IPv4 almost unusable now.

CGN3 is running in Gateway or Bridge mode?



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I Plan to Stick Around
Posts: 56

Re: CNG3 dropping IPv4 packets in blocks but not IPv6 packets. IPv4 almost unusable now.

Standard residential gateway mode. It's been power cycled and factory reset a number of times to no avail. The problem persists.

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I Plan to Stick Around
Posts: 56

Re: CNG3 dropping IPv4 packets in blocks but not IPv6 packets. IPv4 almost unusable now.

After a mass of debugging the network and even replacing the CNG3 with a new CGN3ACSMR the problem was found to be a Netgear WN2500RP range extender that was effectively poisoning the whole of the CNG3 networking stack. As soon as that was removed from service, the problem vanished. The firmware on the WN2500RP has recently been updated to V1.0.0.30_1.0.58, but I'm not convinced that was the cause, so I include the info here for refernce only.

View solution in original post

Resident Expert
Resident Expert
Posts: 7,012

Re: CNG3 dropping IPv4 packets in blocks but not IPv6 packets. IPv4 almost unusable now.

Is that used for Rogers Home Security, or is that something that you had added to your network on your own?  It its something that you added by yourself, its an interesting observation.  I wonder how many other cases we're going to run into where the user isn't familiar with Wireshark and doesn't have the necessary knowledge to troubleshoot the same problem?



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I Plan to Stick Around
Posts: 56

Re: CNG3 dropping IPv4 packets in blocks but not IPv6 packets. IPv4 almost unusable now.

It was my own addition as I needed both to extend the coverage and supply network access to some Ethernet  only devices, such as a couple of NAS units. Wish the CNG3 series had diagnostic serial access, or ssh to the internal OS. 

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Posts: 7,012

Re: CNG3 dropping IPv4 packets in blocks but not IPv6 packets. IPv4 almost unusable now.

Were there any visible issues with the operation of the network beyond the Wireshark data and the packet loss that it showed?  What about web browsing, gaming, video streaming, etc, etc?



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I Plan to Stick Around
Posts: 56

Re: CNG3 dropping IPv4 packets in blocks but not IPv6 packets. IPv4 almost unusable now.

The impact was very noticeable in that file transfers stalled to the point of failure, video streaming was unusable and Web pages would fail to load if they hit the disconnect periods. VOIP / Webex was also unusable because there were complete voice dropouts. Basically, it rendered the connection unviable. Even "speedtest" runs failed to complete. 


@Datalink wrote:

Were there any visible issues with the operation of the network beyond the Wireshark data and the packet loss that it showed?  What about web browsing, gaming, video streaming, etc, etc?