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  Forum  Open Source Tec...  Linux Server  IPv6 addrconf: prefix with wrong length 96 error on Ubuntu
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New Post 3/8/2012 3:50 PM
Informative
  Walker
119 posts
www.lairdscomputer.com
10th Level Poster


IPv6 addrconf: prefix with wrong length 96 error on Ubuntu 

If you get this error message in your console (dmesg) logs on Ubuntu:

IPv6 addrconf: prefix with wrong length 96

Then what is happening is that your server is autoconfiguring an ipv6 address that is also in use somewhere else.

You can fix this by doing the following:

sysctl net.ipv6.conf.all.accept_ra=0
sysctl net.ipv6.conf.all.autoconf=0
sysctl net.ipv6.conf.lo.autoconf=0
sysctl net.ipv6.conf.eth0.autoconf=0
sysctl net.ipv6.conf.eth1.autoconf=0

You will also need to manually add those entries to /etc/sysctl.conf also to have them survive a reboot.

Walker
www.lairdscomputer.com

 
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