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FVS336GV3 loses WAN connection
We have an FSV336GV3 Prosafe Firewall. It is using the latest firmware (version 4.3.5-3). It is connected to an Xfinity labeled DOCIS 3 cable modem. Periodically (like once a week at times) it loses its connection to the WAN over WAN port #1 (I have not tried WAN port #2). When I log into the firewall and check the status of the WAN connection, the display indicates that it is connected, however there is NO traffic. When I "renew" the lease, this typically restores the actual connection and traffic over the Internet is restored. I have no idea why this is happening and would appreciate any suggestions on how to prevent it that other users might have to offer.
Thanks for the feedback. I'm glad to know that your internet connection through the FVS336Gv3 is still up and running.
I research about the logs you posted and found out that these logs are generated when there is malformed packet detected. When a packet with error is received by the interface of the router, it will throw this log and dropping the packet. The 'error code 10' is a length mismatch error.
Since the internet connection through the FVS336Gv3 is now fine and if ever the logs your posted is not of your concern as of the moment, I encourage you to mark the appropriate reply as the “Accepted Solution” so others can be confident in benefiting from the solution. The NETGEAR Community looks forward to hearing from you and being a helpful resource in the future!
Regards,
DaneA
NETGEAR Community Team
10 Replies
Hi dsteinbo,
Let us isolate the problem. Kindly answer the questions below:
a. If you will connect a PC or laptop directly to the Xfinity cable modem, is the internet connection just fine?
b. Are there any recent changes on the settings of the FVS336Gv3 or within your network setup that might have triggered the problem?
c. Have you tried to factory reset the FVS336Gv3 then reconfigure it from scratch and check if the same problem will occur?
I suggest you to try using WAN 2 port and observe if same problem will occur. Let us know the result.
Regards,
DaneA
NETGEAR Community Team
Thank you for your quick reply. There have been no recent changes that would cause this behavior. The behavior has been going on for several months--I just didn't bother to ask Netgear for diagnostic suggestions until now. I have connected the unit to a different port on the Comcast/Xfinity cable modem to see if that makes any significant difference. The time interval between Internet connection "failures" can be as little as a day or as long as several weeks.
As I try each one I will let you know the results (Are there particular elements I should "log" in the unit's log that would provide useful information to you? If so please let me know and I will enable them.
Since you have connected the FVS336Gv3 to a different port on the Comcast/Xfinity cable modem, it seems that the cable modem you have is a combination of modem & router. With regard to this, you have a Double NAT scenario wherein a router (which is your FVS336Gv3) is behind another router (the Comcast/Xfinity cable modem-router). I suggest you to set the Comcast/Xfinity cable modem to bridge mode so that the Public WAN IP Address will be registered on the FVS336Gv3. Then observe the internet connection through the FVS336Gv3 if the same problem will occur.
Regards,
DaneA
NETGEAR Community Team
The Xfinity/Comcast cable modem has always been operating in "bridge mode." We do NOT have a double NAT situation. The Netgear firewall/router receives a WAN IP address from the Comcast cable modem. The Netgear firewall/router then functions as the DCHP server for our LAN.
We haven't had the Internet connection fail since I changed which port on the cable modem we are using. We will have to see if using a different LAN port on the cable modem solves the problem (we need to give it at least a week to see if that is the source of the problem).
I will update this post as soon as I have learned anything more.
Thank you!!
Dane:
Thank you for checking in with me. So far the Internet connection through the FVS336GV3 has stayed up (ever since I moved the Ethernet cable to a different LAN port on the cable modem). I am wondering whether the cable "end" was not properly "seated" in the original LAN port and that was causing the connection to intermittentlly fail. Alternatively, could it be that that particular LAN port on the cable modem's built in four port gigabit Ethernet switch is failing?
I will let you know if there is any change!
Thanks again for hour help!!
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