Jedi5 Author

Level 1

9 points

Help: Xfinity Internet slow speeds?

Hi everyone.

I hope someone can chime in and help me out here with my internet speeds.

Had an xfinity tech come out and they couldn't find the problem either.

Have 250Mbps package with xfinity for my internet. I'm getting a steady 90Mbps throughout the house.

In my office I have an iMac which is hardwired to the modem and router.

Even hardwired my iMac is getting 90-95Mbps.

I have the AE ME918LL/A for router and Netgear CM600 for modem.

The tech and I did a speed test on my iPhone X, MBP, iPad, and his iPhone, and each time we were getting 260-290Mbps when the test was performed in the office where all the equipment is located.

Did a test on the hardwired iMac and we got speeds in the 90s.

Did speed tests on different floors of the house and I'm getting in the 90s.

I was told by the xfinity tech that realistically, I should be getting at worst, 200Mpbs throughout the house.

If someone can chime in and help out, I'd more than happy to provide my network setup.

Posted on Sep 18, 2018 11:12 AM

Top-ranking reply

Tesserax

Level 10

157,896 points

Posted on Sep 20, 2018 1:28 PM

100Mbit/s is what I got on my iMac using Network Utility

I would like for you to do the following:

Power-down the Netgear gateway, the AirPort base stations, and your iMac. Order doesn't matter.
Connect a single Ethernet cable between the Netgear and the iMac.
Power-up the Netgear. Give it about 5 minutes to initialize.
Power-up your iMac. Leave the AirPort base stations powered off.
Using the Network Utility, what is the Link Speed read now? Is it still 100 Mbit/s or 1 Gbit/s?
If it is still 100 Mbit/s, either the Netgear, the cable, or the iMac's Ethernet settings is faulty/wrong.
If it is 1 Gbit/s, then power-down the Netgear and iMac. Again order doesn't matter.
Now connect your "main" AirPort base station to the Netgear, using the Ethernet cable that was connected to the iMac. Connect a second Ethernet cable between one of the available LAN (opposing arrows) ports on the base station to your iMac.
Power-up the Netgear, wait at least 5 minutes for it to initialize.
Power-up the AirPort base station, wait until its status LED is a solid green.
Power-up the iMac.
Again, use the Network Utility. What is the Link Speed now?
Did it drop back down to 100 Mbit/s or is it now 1 Gbit/s?

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39 replies

Jedi5 Author

Level 1

9 points

Sep 19, 2018 10:18 AM in response to Jedi5

So I started to reconnect my 2 other Extremes.

As I was waiting on the first one Extreme to reboot after a reset, I decided to do a speed test.

Main working Extreme is in basement.

I'm in the 2nd floor now with only one working Extreme.

Did a speed test on my MBP and got 294.

This was wirelessly too.

Jedi5 Author

Level 1

9 points

Sep 20, 2018 11:36 AM in response to Tesserax

@Tesserax

Can you please reword or explain exactly how you want me to

connect the router/modem/imac?

i think i understand but I want to make sure i do this correctly.

100Mbit/s is what I got on my iMac using Network Utility

Jedi5 Author

Level 1

9 points

Sep 20, 2018 7:37 PM in response to Tesserax

Correct, all I had powered up and connected were the iMac and Netgear Modem.

The cable is good.

It’s a patch cable I use for another connection.

If the port for the modem or iMac was faulty, then shouldn’t my internet be down altogether?

Tesserax

Level 10

157,896 points

Sep 20, 2018 9:20 PM in response to Jedi5

Then link speed cannot be zero. If it is after you performed those first five steps, then I’m at a loss for the reason and you can still gain Internet access with the iMac in this configuration.

You may need to have someone there to verify the steps and the results to make sure nothing was missed.

Jedi5 Author

Level 1

9 points

Sep 21, 2018 4:23 AM in response to LaPastenague

@Tesserax -

I should be able to connect modem directly to iMac and get internet service, right?

Connecting modem directly to iMac does NOT give me internet.

@LaPastenague -

Wireless is turned off as I have a patch cable connected for internet to the iMac.

I guess I can go out and buy a thunderbolt to try.

Then just return after testing.

I thought maybe there was a setting we could try first on the iMac to test.

Jedi5 Author

Level 1

9 points

Sep 21, 2018 8:30 AM in response to Bob Timmons

I honestly can't possibly make this up...

Disconnected the patch cable from iMac thinking I'll try wirelessly and see

if I can get the high speed again.

Nope.

No connection at all.

Thought maybe I unplugged the wrong cable and brought my network down.

Nope, only the iMac wouldn't connect wirelessly.

Jedi5 Author

Level 1

9 points

Sep 21, 2018 9:04 AM in response to Bob Timmons

Sorry, yes I have reset the modem quite a few times per Netgear instructions.

Nothing changed. No internet when modem connected directly to iMac.

I only get internet when modem connects to extreme to iMac.

Hardwired too.

My last post was simply pointing that now I seem to have a new problem.

1-3 days ago it was working fine but just now when I disconnect patch cable on my imac

and try to connect wirelessly, I have no internet...

Jedi5 Author

Level 1

9 points

Sep 21, 2018 9:56 AM in response to Tesserax

@Tesserax,

No, the iMac has never been repaired.

It was bought brand new directly from the Apple Store.

When I purchased the modem brand new, I never configured the modem.

I didn't know I had to.

Powered the modem on, connected the cables and it worked fine.

Should I configure the modem?

If so, to what or how?

Sep 21, 2018 10:23 AM in response to Jedi5

If the modem resets correctly, then you will have an Internet connection when you connect the Mac directly to the modem.

As I said before, everything that you are telling us so far indicates that the modem is not resetting correctly. Please contact Netgear support, or if possible, replace the modem. If the replacement behaves the same, then try another brand of modem.

Jedi5 Author

Level 1

9 points

Sep 21, 2018 12:21 PM in response to Tesserax

Yes, I've reset the modem quite a few times now.

Resetting didn't work.

I powered down the modem as well for an hour today.

That's the longest I've had the modem powered completely off.

I'll power off the modem longer tonight.

Kind of difficult with family who want their internet... 😁

So I'll power down longer and try again tomorrow.

If that doesn't work, I'll contact Netgear.

If Netgear can't figure it out, I'll get a new modem and see if the problem is fixed.

Jedi5 Author

Level 1

9 points

Sep 18, 2018 11:43 AM in response to Richard Fernandez

Yes, I have a late 2009 iMac.

I'm using a cat5e going from AE to my iMac.

Jedi5 Author

Level 1

9 points

Sep 18, 2018 2:53 PM in response to LaPastenague

Ok, just swapped my patch cable going from router to iMac and no change in speed.

I swapped the cable going from modem to router and also no difference in speed.

Jedi5 Author

Level 1

9 points

Sep 18, 2018 4:03 PM in response to Jedi5

Forgot to add, I'm using the Netgear CM600 for modem.

Tesserax

Level 10

157,896 points

Sep 19, 2018 1:54 PM in response to Jedi5

Did you get a chance to verify those Ethernet setting I mentioned?

Jedi5 Author

Level 1

9 points

Sep 20, 2018 5:17 PM in response to Tesserax

@Tesserax

I followed steps 1-4 as you instructed.

Using Network Utility, I got 0Mbit/s.

Yep, zero as in no internet connection.

I stopped and didn't go further.

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Help: Xfinity Internet slow speeds?