Regular Visitor
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5 Messages
Speed test
There is discrepancy when testing speeds. Using xfinity test or Oakla I get 30-35 maps consistently.
Using Mlab I get 190-200 mbs which is supossibly what I am paying for.
Verizon gives me the same as Mlab, and if use fast.com I get 80-90 mbps.
A 10 to 15 percent is perhaps expected but 6 times lower using your test is wrong.
Specially since I am supoose to get 200 mbps as the MLab correctly gets.
XfinityWilliam
Official Employee
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1K Messages
9 months ago
Hello @Chumpitaz. Each speed test site will calculate internet speeds based off of their own algorithms. Another factor is congestion on your network and if you are using Wi-Fi or are hardwired. One more factor is what Wi-Fi band you are on (2.4,5) as they will each yield different speed results.
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Chumpitaz
Regular Visitor
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5 Messages
9 months ago
Hello,
First, it is true that every test uses a different algorithm However there is basically very few tests out there. The majority fall as:
The point here is that a variance of 10-20 % could be understood not 100%.
Second, there is no congestion on my network. This is the usual argument stated. My network has Gigabit speed on all its servers. I have tested this using some tools and they are consistent.
Third, I am using hardwired connections to your modem when testing.
You use MTU 1500 for IPv4 and 1452 for IPv6, this is causing an issue and more tests on my part may give make a clue where.
However, If I use for example on my test, servers hosted by WhiteSky in ATL I get also full 200 Mbps, this compares to what I get with M-LAB.
Everything being equal, this points to that Xfinity is misconfigured in the area I am (Chicago) and as I said more testing may give me a clue but it may be difficult.
You may be giving priority to Streaming for example that is one possibility.
Have a good day.
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Chumpitaz
Regular Visitor
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5 Messages
9 months ago
Hello there.
I did fix the issue. I am getting speeds of around 200 mbps regardless of the test used.
To make a long story short. Decided to upgrade the router I was using, this included adding dedicated nics instead of using usb ethernet adapters.
The usb adapters seemed to be unreliable.
After the upgrades mentioned, tests using different apps are getting the same consistent results and in the consistent my speed subscription.
Have a good day.
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