CODA-4582 - Open Issues for Investigation

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ishine80
I Plan to Stick Around
Posts: 17

Re: CODA-4582 - Open Issues for Investigation

@Datalink the pc devices are also connected across the wifi 2.4 signal.
borford
Rogers Employee
Rogers Employee
Posts: 145

Re: CODA-4582 - Open Issues for Investigation


@ishine80 wrote:
@Datalink the pc devices are also connected across the wifi 2.4 signal.

 

ishine80 


The biggest obstacle we will have here is that the situation and terminology is being confused. You need to be absolutely clear about the details as I laid out previously in order to attempt a resolution. Consider the following questions.

 

1) Is it the modem that is bridged, basically changing it from a router/modem to a modem only?

2) Is it your own router that are using that provides the only wifi source in the home?

3) If the modem is truly bridged, how many ethernet ports are in use at the back of the modem?

4) How many wifi networks (SSIDs) of your own that are visible in your home?

5) Are there any extenders in use?

 

A side note, please turn off the smart switch (data) on your mobile phone to prevent the automatic switching from wifi to data. It doesn't make sense to allow your mobile phones to do updates unless connected to wifi. Phones will switch for multiple reason. Loss of internet, or low wifi signal being 2 of them. For android phones, I use a "data switch" app that is free that allows one tap to enable data when I'm out and only if I need it.

 

Please clarify again so that this may be resolved.

 

Brian

ishine80
I Plan to Stick Around
Posts: 17

Re: CODA-4582 - Open Issues for Investigation

@borford My apologies.  I'm not too tech savy and didn't know what exactly our tenant was doing.

I've confirmed with him the following.  He is using a linksys extender down in our basement which connects to the wifi.  The house is from 1949 and we were having a hard time trying to run wires / get wifi to him down there.  

 

To answer your questions now.

1) The rogers gateway is not bridged

2) We are all trying to use the wifi signal coming from the CODA

3) Modem is not bridged

4)In our own home we have our 2.4/ 5 connections from the CODA plus the extender signal

5) yes a linksys extender

 

 

Datalink
Resident Expert
Resident Expert
Posts: 7,237

Re: CODA-4582 - Open Issues for Investigation

I think its fairly clear. The CODA-4582 is running in Gateway mode upstairs, the linksys extender is running downstairs, so, that will take up another channel.  The pc's are connected to the linksys extender via ethernet downstairs. The extender connects to the modem via the 2.4 Ghz network.  @ishine80 do I have that correct?

 

Are the phones also connected to the 2.4 Ghz network running from the modem?  

 

Here's my current advice:

 

Check/set the following 2.4 Ghz wifi parameters:

 

Wireless Mode: 802.11 n
Channel Bandwidth: 20/40 Mhz, although, for test puposes you could set this to 20 Mhz. In a crowded wifi environment, I would set this for 20 Mhz.
Wireless channel: AUTO or, to an open channel if one existed, or to the channel that offers the least interference from neighboring routers and modems
WPS Enabled: OFF
Security Mode: WPA-Personal
Auth Mode: WPA2-PSK
Encrypt Mode: AES only

 

Save the setting and ensure that the Encrypt Mode stays on AES only. If it changes on its own to TKIP/AES, change it back to AES only and save the setting again. TKIP is no longer secure and is used will cause the data rate to drop down to 802.11g rates of 54 Mb/s. 

 

Check/set the following 5 Ghz wifi parameters:

 

Wireless Mode: 802.11 a/n/ac mixed
Channel Bandwidth: 80 Mhz, although, for test puposes you could set this to 40 Mhz
Wireless channel: 149 to 165
WPS Enabled: OFF
Security Mode: WPA-Personal
Auth Mode: WPA2-PSK
Encrypt Mode: AES only

 

Once again, save the setting and ensure that the Encrypt Mode stays on AES only. If it changes on its own to TKIP/AES, change it back to AES only and save the setting again.

 

@toolcubed has just reminded me, you can leave the bandwidth on 20/40/80, or Auto.  If you do set this for 80 Mhz, or 20/40/80 or Auto, the modem will command a clear channel to run at the receiving device to determine if the channels required for 40 or 80 Mhz are already in use.  If not, then the modem or router will use a 40 or 80 Mhz wide channel.  If the extended channels required for 40 or 80 Mhz wide operation are already occupied, as detected by the receiving device, then that device will indicate that fact to the modem / router and the transmit channel will shift down to a 20 or 40 Mhz wide channel, depending on the results of that clear channel check.  

 

Reboot the modem if you had to make any changes, ADMIN ..... DEVICE RESET .... Reboot.

 

Look at your wifi environment using one of the following applications running on a (dual band) laptop.  If you can use a dual band laptop, that will show both 2.4 and 5 Ghz bands and it will be easier to determine if you can shift up to the 5 Ghz band, depending of course if your devices can use that band:


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

 

https://www.acrylicwifi.com/en/wlan-software/wlan-scanner-acrylic-wifi-free/

 

http://www.nirsoft.net/utils/wifi_information_view.html

 

Or,

 

For IOS

 

https://itunes.apple.com/us/app/network-analyzer-lite-wifi/id562315041?mt=8

 

For Android

 

https://play.google.com/store/apps/details?id=com.farproc.wifi.analyzer&hl=en


That's the last freebie version of inSSIDer and at this point in time is getting a little old.  Its fine for 2.4 Ghz application and does work for 802.11n 5 Ghz networks.  It does display 802.11ac networks but not as well as it should.  This has become a licenced application now for $20 US and works very well for both frequency bands, 2.4 and 5 Ghz.  For what you need to look at in the 2.4 Ghz band, this is my preference to use. 

 

The other applications are fine for 802.11ac. Acrylic is graphical, WifiInfoView is text only.


What you want to do is determine what channels in the 2.4 Ghz band and 5 Ghz band, specifically the 149 to 165 channel  range are occupied and if so, which offers the least competition in terms of signal level for any given channel.  If you can find a channel or channel range in both groups that is not occupied, that will be the best choice.

 

If you take a screen capture of the wifi networks with inSSIDer, paste that into Microsoft Paint or other graphics program, wipe out your network MAC address, save it, and then include it in a post, we can take a look at both 2.4 and 5 Ghz bands if you load inSSIDer on a dual band laptop.  Running on a 2.4 Ghz channel can be difficult if not impossible due to interference from other neighborhood modems and routers, so, inSSIDer will show that. There is also the issue of interference from cordless phones, microwave ovens and other devices in the home that can cause trouble for 2.4 Ghz wifi.  inSSIDer won't show that, neither will any other typical wifi monitor.  That requires spectrum analyzer capability to determine what else is operating in the 2.4 Ghz band that might be interfering with the modem's wifi.



ishine80
I Plan to Stick Around
Posts: 17

Re: CODA-4582 - Open Issues for Investigation

@Datalink

PC's upstairs are connected to gateway upstairs.  PC downstairs is connected to linksys.  I will try these changes when I get home after 6pm and send you an update.

Datalink
Resident Expert
Resident Expert
Posts: 7,237

Re: CODA-4582 - Open Issues for Investigation

@ishine80, when the wifi connection drops, do  you lose connection on both sets of ethernet devices, upstairs and downstairs?  I can understand if that happens with the downstairs connected pc's, given the wifi bridge, if it also happens to the upstairs pc's that points to a modem connection issue with the CMTS, not a wifi issue.



ishine80
I Plan to Stick Around
Posts: 17

Re: CODA-4582 - Open Issues for Investigation

@Datalink

sorry hard to understand what you mean by ethernet devices.  All my devices are trying to connection to the wifi signal coming from the gateway.  

 

Here are the devices upstairs:

2 active Fido networked iphones, an old iphone that my daughter uses for streaming youtube kids which is not connected to a cellnetwork, plus a laptop for streaming netflix.

 

Dowstairs:

linksys extender, android cell device with cellular network and a PC that streams youtube and other programs.  

 

When the wifi connection drops on the extender and the cellular network connected phones I get the following messages when I check the modem DOCSIS events show the following

18 07/13/2017 13:23:13 90000000 warning MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=Address removed;CMTS-MAC=Address removed ;CM-QOS=1.1;CM-VER=3.1;

19 07/13/2017 23:44:51 82000200 critical No Ranging Response received - T3 time-out;CM-MAC=Address removed ;CMTS-MAC=Address removed ;CM-QOS=1.1;CM-VER=3.1;

 

The youtube kids streaming on my daughters phone does not get affected nor does the streaming of netflix.  I cannot discern if this is due to buffering but usually one of these has been running for a long time before i notice that my cell wifi is no longer active.  

 



 

Datalink
Resident Expert
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Posts: 7,237

Re: CODA-4582 - Open Issues for Investigation

@ishine80 do you have anything that is connected via ethernet to one of the ethernet ports at the back of the modem?  Does your laptop have an ethernet port that you can use for test purposes?  I suspect that you lose all connectivity from the modem, ethernet and wifi, but it would be good to ensure that the ethernet connection would also be affected.  All depends on whether or not you can connect to the modem via ethernet.



ishine80
I Plan to Stick Around
Posts: 17

Re: CODA-4582 - Open Issues for Investigation

@Datalink

nothing is currently connected by ethernet.  I will set up one other laptop we currently do not use regularly and hardwire it to the CODA to see if that as well drops the connection.  I won't be able to get back to you with results until much later this evening after my work day. 

Datalink
Resident Expert
Resident Expert
Posts: 7,237

Re: CODA-4582 - Open Issues for Investigation

No problem 🙂