Question Tp-link AC1750 Archer c7 problems

[counda]

Hello everybody, hope you all well, i want to get advice since tp link support and forum have huge delay, so here it goes:

I have a cable modem (200mpbs), and i just bought tplink archer c7, i've installed it as the instructions say, on the first 24 hours after i buy it, the speed was LOW, but not extremely slow, we suffer from disconnection every 5 hours, but now it's getting worse, the speed is extremely slow (5mpbs to each pc) and the connection is lost 2 times an hour (disconnected), i have 3 pc connected and 1 phone wireless.


The configuration in the router is:

Nat + nat boost is enabled.
Firmware is up to date.
Qos disabled.
Cables cat 5e (is ok).

What I've done so far:

1 - Reset.
2 - Disable nat + nat boost.
3 - Enable and disable QoS.

The problems are:

1 - The router keeps disconnected 2 times in an hour.
2 - The speed is extremely slow.
3 - Sometimes the router haves like "peaks" speeds, and sudden the speed is 80mpbs but after 10 minutes the speed decreasing to 5mpbs.

I would love to solve it instead of waiting the entire year to tplink support, thanks.

 

[kanewolf]

Hello everybody, hope you all well, i want to get advice since tp link support and forum have huge delay, so here it goes:

I have a cable modem (200mpbs), and i just bought tplink archer c7, i've installed it as the instructions say, on the first 24 hours after i buy it, the speed was LOW, but not extremely slow, we suffer from disconnection every 5 hours, but now it's getting worse, the speed is extremely slow (5mpbs to each pc) and the connection is lost 2 times an hour (disconnected), i have 3 pc connected and 1 phone wireless.


The configuration in the router is:

Nat + nat boost is enabled.
Firmware is up to date.
Qos disabled.
Cables cat 5e (is ok).

What I've done so far:

1 - Reset.
2 - Disable nat + nat boost.
3 - Enable and disable QoS.

The problems are:

1 - The router keeps disconnected 2 times in an hour.
2 - The speed is extremely slow.
3 - Sometimes the router haves like "peaks" speeds, and sudden the speed is 80mpbs but after 10 minutes the speed decreasing to 5mpbs.

I would love to solve it instead of waiting the entire year to tplink support, thanks.

Many cable modems have status displays you can access by typing 192.168.100.1 into a browser -- https://www.howtogeek.com/240575/ho...ms-diagnostic-page-when-something-goes-wrong/ . Try that.
Make sure your signals to your cable modem are good. It could be your in-house wiring is not providing good connectivity to your modem.

What do the LEDs on the modem and router do when you have a disconnect ?

 

[counda]

All the icons are green, except the "world" icon going orange.

I think the signals are ok since the previous router works well, but he was limit to 100mpbs so i had to upgrade.

 

[kanewolf]

All the icons are green, except the "world" icon going orange.

I think the signals are ok since the previous router works well, but he was limit to 100mpbs so i had to upgrade.

What model is the modem? I would HIGHLY recommend you look at the data. Just saying that "the old one worked" is no guarantee that the new one is happy. A new modem has new requirements.

 

[counda]

The modem is from our cable company, i will look for the model, for now, i follow the link above, and i see too many details what i don't understand them...sorry....but there is menus: "basic", "advanced", "wireless", "mta".

I came across this under "stauts > connection":

Acquire Downstream Channel	219000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Configuration File	OK
Security	Enabled	BPI+

 

[kanewolf]

The modem is from our cable company, i will look for the model, for now, i follow the link above, and i see too many details what i don't understand them...sorry....but there is menus: "basic", "advanced", "wireless", "mta".

I came across this under "stauts > connection":

Acquire Downstream Channel	219000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Configuration File	OK
Security	Enabled	BPI+

Read the link I posted about interpreting the data. The important things are the power level downstream (should be around 0db) -3 to plus 6 are good. And signal to noise ratio. Around 40db or higher is better. Here is another how-to page -- https://pickmymodem.com/signal-levels-docsis-3-03-1-cable-modem/

 

[counda]

I think this is:

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	Uncorrectables
Downstream Bonded Channels
1		QAM256		219000000 Hz	2.1 dBmV	38.1 dB	0	0
2		QAM256		177000000 Hz	3.3 dBmV	39.1 dB	0	0
3		QAM256		183000000 Hz	3.0 dBmV	39.3 dB	0	0
4		QAM256		189000000 Hz	2.8 dBmV	38.9 dB	0	0
5		QAM256		195000000 Hz	2.0 dBmV	38.5 dB	0	0
6		QAM256		201000000 Hz	2.1 dBmV	38.3 dB	0	0
7		QAM256		207000000 Hz	3.1 dBmV	38.6 dB	0	0
8		QAM256		213000000 Hz	2.6 dBmV	37.9 dB	0	0

 

[kanewolf]

I think this is:

Downstream Bonded Channels
Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	Uncorrectables
1		QAM256		219000000 Hz	2.1 dBmV	38.1 dB	0	0
2		QAM256		177000000 Hz	3.3 dBmV	39.1 dB	0	0
3		QAM256		183000000 Hz	3.0 dBmV	39.3 dB	0	0
4		QAM256		189000000 Hz	2.8 dBmV	38.9 dB	0	0
5		QAM256		195000000 Hz	2.0 dBmV	38.5 dB	0	0
6		QAM256		201000000 Hz	2.1 dBmV	38.3 dB	0	0
7		QAM256		207000000 Hz	3.1 dBmV	38.6 dB	0	0
8		QAM256		213000000 Hz	2.6 dBmV	37.9 dB	0	0

Yes. those look like decent values. The next thing to check is the log the modem has. When the "world" turns orange, that usually means that the modem has lost connection to the ISP.

 

[counda]

Ok, thanks, i will wait for another disconnection and post the log.

 

[kanewolf]

Ok, thanks, i will wait for another disconnection and post the log.

Usually the log has pretty good history. You might see something just reviewing the log you currently have.

 

[SamirD]

Are you having these same speed issues wired?

 

[counda]

Are you having these same speed issues wired?

Only wired, with wireless it's ok...not fast but ok...

 

[counda]

Yes. those look like decent values. The next thing to check is the log the modem has. When the "world" turns orange, that usually means that the modem has lost connection to the ISP.

There was now a disconnected, i go to the modem log:

Sun Mar 22 01:52:04 2020	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=.......;CMTS-MAC=.....-QOS=1.1;CM-VER=3.0;
Sun Mar 22 01:51:16 2020	Error (4)	Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=.......;CMTS-MAC=........*;CM-QOS=1.1;CM-VER=3.0;
Sun Mar 22 01:51:16 2020	Error (4)	Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=........;CMTS-MAC=......;CM-QOS=1.1;CM-VER=3.0;

 

[counda]

The internet come back again after 5 minutes, but with slow connection, i've try to log in to the modem but it give a message:

"wan connection error! unable to connect to the internet please contact your service provideror try again later"

any ideas?

Update: again extremly slow connection.

 

[SamirD]

Strange it is only happening on wired. If it is a modem problem it should be the same for both.

What happened to your modem signal levels when it got slow?

 

[counda]

the modem level is the same.

The support from tp-link advised to turn the router to access point, i will give it a try, if not they give the option to get new.

 

[kanewolf]

Only wired, with wireless it's ok...not fast but ok...

If wireless works, then it can't be a modem issue. The modem would be common to both wired and wireless.

 

[counda]

Still a problem, the RMA can't replace in this time because of the corona virus.

I will try to convert it to access point, i will google and update.