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Solved
ICMPv6 RA: ndisc_router_discovery() failed to add default route
I am seeing the following message in my logs every minute or so: [FVS318Gv2]Sat Dec 31 13:00:39 2016(GMT-0800) [FVS318Gv2][Kernel][KERNEL] ICMPv6 RA: ndisc_router_discovery() failed to add default r...
I ended up factory resetting the router per support.
So far things are good. I have not enabled ipv6 yet and will do so soon. So it appears that upgrading the firmware and then doing a factory reset is what was required.
Hi brianandrus,
Are there any recent changes in the settings of the FVS318Gv2 or recent changes within the network setup (such devices added or applications installed) that might trigger what you see in the logs?
Just to set your expectation, if you wanted the logs be interpreted, I suggest you to open an online case with NETGEAR Support. Kindly state your concern and attach the logs to the online case. After you have the requirements for escalation be ready, then it will be forwarded to the engineering team. The engineering team will be the one to analyze the logs.
Regards,
DaneA
NETGEAR Community Team
DaneA,
The one change I made was to lower the MTU from 1500 to 1492, but those log messages were showing up before and after the change.
The change was made because the device would just stop working for new sessions. If I had an open SSH session to a system, that stayed working, but any new connections would not go through. I saw that lowering the MTU could help that (which it seems to have remedied).
Everything seems to be working other than that message being spammed to the logs. I'll likely just turn off logging and let it be, unless issues start up again.
Brian
I'm glad to know that everything is working. :) About the MTU sizes, refer to the image below:
If ever the logs you've posted bothers you, you may open an online case with NETGEAR Support at anytime.
If you don't have any other concerns, I encourage you to mark the appropriate reply as the “Accepted Solution.” The NETGEAR Community looks forward to hearing from you and being a helpful resource in the future!
Regards,
DaneA
NETGEAR Community Team
It seems I spoke too soon. Now the router has been behaving as before: It suddenly just plain old stops routing. I am unable to connect to it or even ping it. I have to power-cycle it to get it up. That is occuring about 2x a day... grrrr
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