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Ethernet speeds vary wildly and unpredictably.

I am having trouble with wired connections to Core. I do not have any switches between the device (PC) and the router. Several times a day the download speeds drop to almost nothing and then go up to maybe 30 to 40 Mbps. Can't predict when. I have a 60Mbps provider. They were out today to check the cable and connections and found nothing wrong, and very little noise on the line. They put in a new signal amplifier as a "just in case" measure. Still have the problem. 

The Core app always shows 64 Mbps download, 5.6 Mbps upload, even when the PC is running at 30 Mbps or less. Wireless devices seem to not be affected. I generally have between 9 to 12 devices active on the network, one or two wired along with an Ethernet NAS device.  

My ISP has a speed test and at times I can't even load the page, let alone the test. Sometimes the test itself times out. Never experienced these problems before. Have had my Core installed for a few days and have the latest firmware installed. Have swapped in new Cat 7 flat cables.

Next step, when I get a chance, is to reinstall my prior Netgear router to see if that resolves the problem. Any other suggestions??

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Re: Ethernet speeds vary wildly and unpredictably.

Try disabling Network Inspection to see if you get better results:

https://support.norton.com/sp/en/us/norton-core-security/current/solutio...

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Re: Ethernet speeds vary wildly and unpredictably.

I am seeing something similar.  Just moved a wired connection to Core and it is at 1-2 MBPS, Wireless is at over a hundred (Am on Google Fiber).  Don't understand why the wireless connection is fine, but wired so slow.  Was fine on the previous router.

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Re: Ethernet speeds vary wildly and unpredictably.

I tried turning off inspection, but it did not make much of a difference.  Did not resolve the issue.

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Re: Ethernet speeds vary wildly and unpredictably.

I put my old router back in. My wired connection is now running at 66Mbps and the speed-test graph is super flat, no spikes, no dips. Upload is about 5.7 Mbps. Also a pretty flat curve. It's been like that all morning. We'll see if anything changes over the next few days.

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Re: Ethernet speeds vary wildly and unpredictably.

Hi @wjhallahan & @TargetPK,

I have sent you private messages requesting additional information. Can you please check your inbox when you get a chance? Thank you. 

-Gayathri

Gayathri R | Norton Forums Global Community Administrator | Symantec Corporation
Accepted Solution
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Re: Ethernet speeds vary wildly and unpredictably.

I have tracked this problem down to a network adapter on my PC. It's a Windows 10 system with a Hyper-V machine and a virtual network adapter. When I removed the virtual adapter, download speeds went from 8 Mbps to 66Mbps. I switched to the "Default Network Adapter" that is now provided with Hyper-V, and the download speeds are consistently in the 64-66 Mbps range.

Wireless speeds on the Core router were never affected and downloads run at 60+ Mbps. The Core App has always shown download speed of 64Mbps and upload at 5.6 Mbps. So, THE PROBLEM IS NOT IN THE Norton Core, but in the Virtual Network Adapter that was created for the Hyper-V virtual machine I was using. 

Gayathri_R: Thanks for your quick response. Again, this is NOT a Norton Core problem. Just took me a couple of days to uncover the real culprit.

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Re: Ethernet speeds vary wildly and unpredictably.

After a reboot and apply what were apparently pending windows updates my issue seems to have gone away.  I want to say that Norton support reached out to me to help address the issue so kudos to them for their good support of this product.

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Re: Ethernet speeds vary wildly and unpredictably.

Thank you for the confirmation, @TargetPK & @wjhallahan

-Gayathri

Gayathri R | Norton Forums Global Community Administrator | Symantec Corporation

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