Failure of establishing an internet connection after reboot of a rooter

[TomHyphens]

Dear support staffs,

Firstly, please forgive me for posting in English due to my poor German.

My cable internet often fails to establish the internet connection, after rebooting of the rooter.

Could you please give me some solution?

I happened to the trouble at leaset twice.

1st-time trouble

This trouble first occured on 20th of October, where:
the router had not been able to establish the connection for 2 days; and
then, suddenly the connection recovered for some reason.

2nd-time trouble

Today, 23rd of Octorber, after I turned off-on the router to arrange my room, the connection failure occured again, which connection failure has not solved yet.

What I did when involved in the troubles are:

- Changing a satellite cable (in 1st-time trouble) and

- Doing factory reset on the router (both in 1st-time and 2nd-time troubles).

The Error messages of the Event-log of the Fritz! BOX in 1st-time trouble are as follows:

- Internet connection IPv6 could not be established: No response from DHCPv6 server (SOL)
- Internet connection IPv6 could not be established: No response from DHCPv6 server
- Internet connection failed: Error reason: 2 (DHCPv4 no answer on DISCOVER)
- Internet connection failed: Error reason: 3 (DHCPv4 no answer on REQUEST)

After sudden recovery from the 1st-time trouble, I found the following message recorded on the Event-log:

The service provider has successfully established. IP address: XXXX: XXXX :: XX: XXXX: XXXX: XXXX: XXXX

Additional information : 

In which state do you live? Please also send the zip code
Bayrn, Freising 85354

Which contract do you have? (e.g. internet + telephone 100)
Red Internet & Phone 1000 Cable

Which modem / router do you use? (e.g. Hitron)
Fritz!box 6591 Cable YP

Do you use a loaner device from us or do you have your own device ?
I use a loaner device

How is your terminal with the modem connected ? ( LAN; WLAN; additional router; PowerLAN )
LAN, WLAN

Which browser do you usually use? (e.g. Firefox)
Chrome

Which operating system do you have on your computer? (e.g. Windows)
Windows, iOS, Android

Start and period of the disturbance  (e.g. since the beginning of April; only in the evening)
since 20th of Octorber

What measures were carried out by the fault hotline (available at 0800-5266625 for Vodafone Kabel Deutschland or 0221/46619100 for Vodafone West)?
After processing Netz-Assistent, you called me via phone call. But I could not communicate with your staff due to my poor German skill.

Thank you for your help.

Best regards,
TomHyphens

[Wallace]

Hi TomHyphens,

the technician will contact you soon and make an appointment with you.

Regards

Wallace

[TomHyphens]

Dear Wallace,

I have been waiting for contact from your technician but he/she has not contacted me yet.

If it is difficult for them to contact me soon, I would like to ask you to send me a new router first, as I requested you in the previous message.

I have been suffering this issue for more than one month....

Thank you for your support.

Best regards,

Tomhyphens

[pRo-Marco]

Hi TomHyphens,

sorry, that the appointment did not happen At the moment the signal is good. I'll send a new router at your place.

Kind regards

Marco

[TomHyphens]

Dear Marco,

Thank you for your arrangement and I have received a new router.

So far it seems that the new router works better than the older.

If there should be another problem, I will notify you.

Best regards,

Tomhyphens

[Claudia]

Hello TomHyphens,

good that the new router seems to help :). I will close your thread now, if problems occur again, don't hesitate to open a new thread. You will get a private message with a survey as well, we would be happy if you partake.

Kind regards,

Claudia