slow wifi

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I Plan to Stick Around
Posts: 12

Re: slow wifi

That definitely cleared up alot and helped me understand exactly what you meant! so thank you for that. You mentioned checking if the modem was set to 20/40 Mhz...how do i check that? I really appreciate the time you are taking to simplify everything for me

Resident Expert
Resident Expert
Posts: 928

Re: slow wifi


@Datalink wrote:

If you decided to replace it someday because you want better wifi performance, you would need to look for a laptop that supports 300 Mb/s at a minimum, and now, with the advent of 802.11ac, you can see 1300 Mb/s between the modem / router and the laptop, although I doubt that the advanced modem would actually support that.  You would most likely have to buy and install a good third party router to really support that data rate between the router and the laptop.  VivianM can definitely help in finding a better laptop if you decide to go that route someday.


Yup.

 

Well, for a Windows laptop in 2015, what you really want is a 2-stream 802.11ac card, i.e. Intel 7260/7265. Those can do 867 megabits/sec to an 802.11ac base station. (I am not sure if any Windows machines are sold with 3-stream cards; the retina MacBook Pros have them) I'd be cautious of single-stream 802.11ac cards, i.e. Intel 3260, but even that is miles better than garbage single-stream, single-band, elcheapo 802.11n cards.

 

Harsh reality is, that means we've just ruled out 90%+ of <$1000 Windows laptops, and a surprising number of pricier ones too, at least in the consumer world (serious business machines, e.g. Dell Latitude or Lenovo ThinkPad, almost always come with good wifi cards).



I Plan to Stick Around
Posts: 12

Re: slow wifi

thats totally ok! i've been reading everything you and @VivienM have been replying with and i appreciate all the information the both of you have to give! 

 

Its a Gateway laptop, it was a fast last minute purchase with not much thought put into it! so i will most definite get something better next time, the wifi works i guess thats better then no wifi at all

Resident Expert
Resident Expert
Posts: 6,026

Re: slow wifi

This is one of those settings that should be user accessible, but isn't.  You will have to call tech support and ask the CSR to check the wifi channel setting and ensure that its set for 20/40 Mhz mode of operation.  There are probably three settings:  20 Mhz which is a single wifi channel, 20/40 which is an auto setting to use a single wifi channel or two wifi channels if that is possible, and then perhaps a 40 Mhz setting, which is supposed to use two wifi channels full time.  That last one is most likely theoretical as the modem will still instruct the laptop to check for a clear secondary channel and if its not clear, it should not be used. 

 

Ask the CSR to tell you what the choices are.  Once of those choices should include a 20/40 Mhz (2 wifi channel) Auto mode of operation.



Resident Expert
Resident Expert
Posts: 6,026

Re: slow wifi

If you do replace the laptop at some point, you definitly want to move up to the 5 Ghz band which is less crowded and which provides higher data rates due to the full time use of 40 Mhz wide channels.  Its just a better design, no overlapping channels and every channel is 40 Mhz wide.  Use of two, three or four channels simultaneously is possible with 802.11ac, which leads to data rates in the 1300 Mb/s range or higher.  Of couse the caveat still applies, those multiple channels have to be clear for use, but if they are, you can see very high data rates.



Resident Expert
Resident Expert
Posts: 6,026

Re: slow wifi

Looking at your screenshot, here are a couple of items to check. I see that you are using the default Rogers network name. You should ensure that the modem password, network name and network passphrase have all been changed from their default values. To do this, you should be connected via ethernet while making changes, otherwise, if connected via wifi, and you are changing network names and passphrases, you will disconnect during the process.

 

If you only use the 2.4 Ghz wireless, you should only see the 2.4 Ghz wireless LED lit, on the front of the modem. If you don't use the 5 Ghz wireless network but it is running, as is shown by the front LED, you should turn it off.

 

To change the wireless network name, login into the modem, navigate to Wireless....Basic Settings....2.4 Ghz tab. On the right hand side is the Network name which should be changed. Preferably it should be completely random. It holds 32 characters and usually you don't have to enter it manually into anything else. Go crazy on the keyboard. You could probably select 802.11n Only for Wireless mode, to prevent the modem from using the b or g modes of operation. That will depend if you have any older devices that might need it or not. You should also disable the WPS function as it is a security hazard. If you select the 5 Ghz tab, you can then turn off the 5 Ghz network and / or change the network name. If you do run a 5 Ghz network, select 802.11n if you only have 5 Ghz 802.11n devices in your home and also disable the WPS function.

 

To change the passphrase for the networks, select the WPS & Security tab. On that tabs for both the 2.4 and 5 Ghz networks, set the security mode to WPA2 Only and set the security mode to AES. Change the Pass Phrase from the default if it is still in use to one of your personal choice. The longer, and the more random it is, the better. This holds 8 to 63 printable ASCII characters or 64 hexadecimal digits. If you only have one device for example, such as your laptop, you could store the passphrase in a file and keep that on a USB drive that is accessible. What you can do is go crazy on the keyboard and fill the field with random characters. There are some symbols that the CGN3 doesn't like, but if you stick with letters and numbers that shouldn’t be a problem. Once the field is filled and saved so that you know that the CGN3 will accept all of the characters copy the entire field and save it in a notepad file. You will need this shortly.

 

Once that is done, navigate to the ADMIN...DEVICE RESET tab and select REBOOT. While the modem is rebooting, you can disconnect the ethernet from the modem. When the modem is up and running and the wifi LED is lit, you should be good to reconnect. Since you changed the wifi network name and passphrase, you will have to reconnect the laptop to the modem. Select the wifi symbol at the lower right hand screen corner to bring up the list of available networks, select your network and select "Connect Automatically" and copy and paste in the passphrase that you stored in the notepad file. After that, you should have a network that will be very difficult to hack, to the point that anyone interested in hacking will choose an easier target.



Moderator
Moderator
Posts: 1,463

Re: slow wifi

 

Awesome thread, great analysis and insights from Resident Expets- @Datalink     @Gdkitty  and @VivienM   Thank you all Smiley Happy

 

@CarolS51 , thank you for your post, by default CGN3 uses wide channel 20/40MHz. Let us know if you wish to reconfigure your network, I can have someone reach out through PM.

 

Thanks,

RogersMoin

I Plan to Stick Around
Posts: 12

Re: slow wifi

Thank you @Datalink @VivienM and @RogersMoin Sorry i didnt get back sooner! I changed everything you mentioned all is good! thanks so much for your time and patience explaining everything to me I really appreciate it!

I Plan to Stick Around
Posts: 30

Re: slow wifi

My internet is fast but not for my chromecast it lags very bad it started last week my internet has a lot of range loss I have the rocket modem and It was fine and perfect until last week and I'm getting 2 bars on my iPhone

Resident Expert
Resident Expert
Posts: 6,026

Re: slow wifi

Are you using a 2.4 or 5 Ghz network.  What you can do is look at the wifi environment with inSSIDer, which is a wifi monitoring application.  This will monitor both bands and display in graphical and list form, the other routers or modems which are running nearby.  With that display on hand, you can determine if someone else is running a modem or router on the same channel or overlapping channel and causing problems for your wifi network.  This version doesn't display 802.11ac networks in the 5 Ghz band but there is a new version out, now a pay version which does.  If you use 802.11ac, its worth buying for $20 US.  Load the application on a laptop and check out the competing networks.  

 

http://www.techspot.com/downloads/5936-inssider.html

 

Fwiw, there is an ethernet adapter out now which allows the Chromecast to use a wired connection.  Sadly it appears that its not available in Canada

 

https://store.google.com/product/_ethernet_adapter_for_chromecast