You might have seen this in some of your computers logfiles, and you might be a bit puzzled about the meaning of it.
Apparently, the message is more a debugging message than an actual error, and is caused by path MTU discovery, when a path MTU event happens after some new packets have been queued, but haven't been send out yet. (I'm not 100% sure about this, though).
To solve this, issue this command:
ifconfig ethX mtu 1496
where ethX is the adapter with IPv6 connectivity. Do this for all interfaces with IPv6 connectivity!
Written by Jannich Brendle man 28 februar 2011 In How to