Contributor
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2 Messages
"Invalid IP Packet" displayed in logs constantly and passthrough router has problems
For several weeks, my home router (Netgear R7000) has been crashing multiple times a day. It starts dropping connections to devices and becomes completely unresponsive. I have to power cycle it to get it working again for several more hours before the next crash. Finally, Netgear released a firmware update, which I installed. The all-out crashes stopped, but now the router's connection to the internet through the AT&T Arris BGW210-700 will "hiccup" a few times a day--by this I mean that the connection will drop for about 10 seconds. If you are streaming something or otherwise doing something that requires a consistent connection, it will drop and then restore after 10-30 seconds, but I don't have to power cycle it anymore.
I was convinced the issue was my router, but I now think it may be a setting on the AT&T modem. The logs in my router, which I previously could not get to when it locked up because they got cleared out, show "Internet disconnected" and then "Internet connected" about 1 second apart, which is when those network hiccups occur. Viewing the Arris modem logs, every day there are hundreds of entries showing "Invalid IP Packet" entries that show my network as the source and any series of destinations that don't seem to have a pattern.
The modem is set to "IP Passthrough" but I could not figure out how to set up the "Cascaded Router" setting so that the modem is better configured for having a second router attached. But I also had not changed any settings on the modem for nearly a year before I started having the daily router crashes. I tried disabling the modem firewall settings, but it made no difference. Many of the "Invalid IP Packet" entries initially were showing IPv6 addresses, so I tried disabling IPv6 on the modem, in case there was some conflict, but it did not help.
I think it is likely that some firewall setting or some setting that conflicts with my Netgear router is causing this, but I cannot pinpoint it, especially since, as I mentioned, I did not change anything on the modem when the issue cropped up. Have you experienced this issue? Do you have any recommendations for better configuring the modem to simply be a passthrough to my Netgear router?
d3monkid12
Mentor
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78 Messages
5 years ago
I'm in central Texas. it is very frustrating. whether the invalid ip packets are the problem (or a result of the problem) or not. there is obviously an issue that needs to be fixed
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Amanduh
Tutor
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3 Messages
5 years ago
I am having this same issue with no help from at&t at all!!! I have had 13 techs to my home since may( 3 tech appts were no call no shows) I have a brand new router with 200/300 disconnects in a DAY!
I HAVE OVER 300 entries on my routers log that state "generic discards" "flood limit" "invalid ip packet" and a few more. While looking up the IP addresses that show on my log they come from many IP hosting sites. A lot of sites are from Asia, europe, china etc.
AT&T is the most unprofessional and difficult company I have ever had to work with
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DavidCS
Community Support
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1.7K Messages
5 years ago
Hi @anatolyk ,
With the IP phones, are they connected directly into the gateway or going through a 3rd party router? I know our routers were not designed to handle class A private IPs, so I am wondering if that is the issue.
David, AT&T Community Specialist
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gr8sho
ACE - Professor
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5.4K Messages
5 years ago
Hello @DavidCS
I’ve been watching this issue as well. One of the ADSL2+ customers here had posted to me privately broadband page stats that showed a high number of errors. The suggestion was and still is to ensure proper line quality is in place, but that confirmation is still not forthcoming. Can something be done to put this question to bed?
@d3monkid12 , please add the tables to this thread.
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DavidCS
Community Support
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1.7K Messages
5 years ago
Hi @gr8sho ,
There's no one size fits all solution for the invalid IP packets. I wish it was that easy. Usually, the best way around it is to ensure proper line quality, and even if there are issues with the packets, they will get corrected, so you will not see any degradation of your service. The most common causes we see are DDOS attacks, a virus or malicious spyware on a device, or even line issues where the packets are getting corrupted on the transfer. Sadly, the router logs usually don't help as much. It does show the IP traffic to see if there's activity that shouldn't be there, but the best bet would be to get a packet tracer program to look at the traffic coming in and out and really look at what is happening.
David, AT&T Community Specialist
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gr8sho
ACE - Professor
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5.4K Messages
5 years ago
@DavidCS , thank you.
Wasn't looking for anything other than ensuring proper line quality is in place. Getting this established brings one most of the way there to a good internet experience.
@d3monkid12 , gentle reminder to post your broadband tab tables here, please.
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DavidCS
Community Support
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1.7K Messages
5 years ago
@gr8sho
Gotcha! Totally misread your comment. As always thanks for you input on this.
David, AT&T Community Specialist
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d3monkid12
Mentor
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78 Messages
5 years ago
Which tables? Under the broadband tab in my gateway it has status and configure tabs. Under the diagnostic tab it has NAT table, sys log, & logs. I'm not sure which one you want to see
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d3monkid12
Mentor
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78 Messages
5 years ago
I just came across something on the att website, i don't know if this has anything to do with the issues but to me it seems like it could be part of the problem. On the website i was reading something about the bgw210 gateway and it said something about the bgw210 being for gigabit internet on fiber optic lines. Well i have at&t 12 (for a whole 12mbps when I'm lucky) on adsl2+. Could this be an issue?
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gr8sho
ACE - Professor
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5.4K Messages
5 years ago
Nope. All of their gateways to date support DSL and all it's varieties.
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