Tickets - Continued ICMPv6 checksum failed messages :: SixXS

Ticket ID: SIXXS #9283262
Ticket Status: User

PoP: dkcph01 - Availo (Copenhagen)

Continued ICMPv6 checksum failed messages

Shadow Hawkins on Monday, 29 April 2013 01:16:45

I am getting a lot of this messages in past few weeks. This is not due to configuration error on my part. This is also been creating the issue that youtube (using IPv6) thinks that I am on slow connection and not loading properly. Currently I am using 30/30Mbps fiber internet.

1870171.724903] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [1874972.131416] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [1895793.887175] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [1902034.410695] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [1929456.738343] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [1938577.510939] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [1951538.604412] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [1952978.725417] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [1969060.086107] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [1995042.269685] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2001102.781312] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2105631.583914] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2115652.427941] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2154595.715378] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2159936.166846] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2171097.109615] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2187058.456779] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2222641.448228] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2245443.375525] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2274185.801499] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2359572.998089] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2370973.965228] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2382494.942128] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2388735.470642] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002] [2408777.162544] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002]

I am going to move my server from Gentoo Linux to FreeBSD 9.1-release. I do not know if that is going to change anything. But it is worth mentioning this system change. My current Linux kernel version.

uname -a Linux saturn 3.8.2 #1 PREEMPT Wed Mar 27 04:08:09 UTC 2013 i686 AMD Sempron(tm) 2200+ AuthenticAMD GNU/Linux

Continued ICMPv6 checksum failed messages

Jeroen Massar SixXS Staff

on Monday, 29 April 2013 05:15:46

This is also been creating the issue that youtube (using IPv6) thinks that I am on slow connection and not loading properly.

Please see the FAQ for details on figuring out related problems to this.

[1874972.131416] ICMPv6 checksum failed [2001:16d8:dd00:01a1:0000:0000:0000:0001 > 2001:16d8:dd00:01a1:0000:0000:0000:0002]

Something on your link is causing messages to be broken, thus the checksum fails. As the PoP pings you once in a while it likely has a higher chance of being seen.

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