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Intermittent dropouts many times per day - Xfinity Gigabit internet

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Frequent Visitor

Intermittent dropouts many times per day - Xfinity Gigabit internet

Hi, I've been having a "dropout" problem for many weeks now. I notcie it on Zoom (and other "web") meetings (whether they include video or not), and we also notice them when watching Neflix, Hulu and others on our Smart TV (Samsung). This happens on both my home (wireless internet) PC and my work (hardwired to the modem) laptop.

 

I'm a very tech-savvy guy. I have rebooted my Comcast-provided gateway more times than I've eaten meals. I have checked that cables are tight, etc. 

 

What can be done?

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Expert

Re: Intermittent dropouts many times per day - Xfinity Gigabit internet

Start here;


https://forums.xfinity.com/t5/Your-Home-Network/Internet-Troubleshooting-Tips/m-p/3310447#M316652



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Frequent Visitor

Re: Intermittent dropouts many times per day - Xfinity Gigabit internet

My router is a Comcast one. I have this issue on a directly-connected laptop and my wi-fi connected desktop. Downstream DNRs are 40.3; Power ranges +6.5 to +8. My upstream power is +39. Zero correctable/uncorrectable codewords.

Logs (yesterday option):

System: just one Admin login

Event:

ti_dhcp6c[12589]: 72001011-DHCPv6 - Missing Required Option 82 2020/6/11 19:41:11 Critical
ti_dhcp6c[12589]: 72001011-DHCPv6 - Missing Required Option 24 2020/6/11 19:41:11 Critical
ti_dhcp6c[12589]: 72001011-DHCPv6 - Missing Required Option 82 2020/6/11 19:41:01 Critical
ti_dhcp6c[12589]: 72001009-DHCPv6 - No Advertise or Reply Received 1 times 2020/6/11 19:41:01 Critical

 

Firewall:

FW.IPv6 FORWARD drop , 5507 Attempts, 2020/6/13 09:20:24 Firewall Blocked  
FW.IPv6 INPUT drop , 8920 Attempts, 2020/6/13 09:20:16 Firewall Blocked  
FW.WANATTACK DROP , 18 Attempts, 2020/6/13 09:10:36 Firewall Blocked  
FW.WANATTACK DROP , 11 Attempts, 2020/6/11 19:41:11 Firewall Blocked  
FW.IPv6 FORWARD drop , 4743 Attempts, 2020/6/11 19:40:37 Firewall Blocked  
FW.IPv6 INPUT drop , 8320 Attempts, 2020/6/11 19:38:37 Firewall Blocked

 

Cabling is tight and undamaged. Onky one splitter in my outside box. Signal booster (at the gateway, placed by Comcast) is plugged in and connections are tight.

Pings and traceroutes to a variety of locations are normal.

 

What else?

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Frequent Visitor

Re: Intermittent dropouts many times per day - Xfinity Gigabit internet

I am beginning to suspect it's the gateway itself.

Side note: Photo below of a Netspot scan done just now - I'm connected via the highlighted (purple) row.NetSpot_Scan_Jun13.jpg

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Frequent Visitor

Re: Intermittent dropouts many times per day - Xfinity Gigabit internet

I mentioned this in my earlier post, but yes, my work laptop is where I have the biggest issue, and it’s hardwired to the gateway. I Usually only notice it during Skype, Zoom and (sometimes) Teams meetings. It will disconnect entirely once in awhile or drop audio for 10-15 seconds (most of the time), then come back. This will happen about every five minutes.

If I power cycle the gateway sometimes it won’t do it for a whole day, sometimes it makes no difference.

I’ll look for an image posting site soon.
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Frequent Visitor

Re: Intermittent dropouts many times per day - Xfinity Gigabit internet

Here's the image showing my (purple) signal: https://imgur.com/a/kL0kOKi

 

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Frequent Visitor

Re: Intermittent dropouts many times per day - Xfinity Gigabit internet

I got a new gateway from Comcast over the weekend. This appears to have solved the issue.