Residential customer - how to obtain personal (permanent) IPv6 Address

@andyross

That may be for you but they stated this: " and while I can get it working 95%, COMCAST will randomly change my IPv6 Address assignment, and it kicks everything out the window.".... 

@andyross ,

  I am afraid that I must disagree.  I set this up - had it working and getting a 10/10 from the COMCAST IPv6 test page and 19/20 from here:  IPv6 test - IPv6/4 connectivity and speed test (ipv6-test.com)

  I would test it every day for more than a week.  Then one day I ran the tests again.  I got 4/10 from COMCAST page and 13/20 from the other.   My Domain Controller was also having fits with DNS Forwarder checks and Root Hint checks.  Also noticed that as DHCP records expired - they did not come back.  

  I was using my pfSense system to handle the DHCP - as I could not get Server 2019 to hand out addresses properly and create AAAA and PTR records.  

  I had recorded the IPv6 address what pfSense had for both the WAN and LAN ports.   I noticed that the WAN IPv6 had changed, but not the LAN port.  That should not have been a problem.  So I performed a resynch and then the IPv6 Address changed in the LAN port (which was given by COMCAST - as the LAN port in pfSense was 'tracking' the WAN port...meaning that COMCAST was giving me the LAN IPv6.  Not something that I had created or made static.  

  Immediately after the refresh - I ran the COMCAST v6 test and got 10/10 and the other one was back to 19/20....I then started rebooting devices in my home and noticed they were now pulling IPv6 addresses from the new prefix.  This is not the first time this has happened - but this time happened with no interaction from me.  The first two times, I had power outage long enough to drain the UPS where my Cable Modem is plugged in - so it basically got rebooted, I then noticed the IPv6 addresses in pfSense had also changed.  

  This is VERY LIKE COMCAST to not treat their residential customers with any merit - I mean there are more IPv6 addresses that every person on the planet for 4 generations could have their own address (including their dog, their cat, their goldfish and all their devices).  

  It should be an easy request for a COMCAST RES customer to request one - if they wanted one.  

@bearhntr. What @andyross is saying is true for most customers. Although it can change every 30 days, most users don't see a change for a while. Although we can't provide a fixed IPv6 we can do everything is our power to get you the best connection possible. Your T3 timeouts have spiked starting on 12/4 to now at 410 and FEC are spiking randomly. That points to a physical issue and I would be happy to send a technician out to check it out. If everything inside is good then we should check out the outside. Let me know if you would like to do that. 

@XfinityEthan 

  Please explain what you are talking about T3 TIMEOUTS and FEC SPIKES - what is that???  

  I am using the same setup (CABLE MODEM - I bought my own from your list of 'supported' modem) that I have been using for 9 years.  Nothing has changed there.  The only major change in my home was removing the NETGEAR ORBI as my router and replacing it with the pfSense box.  The ORBI is still here, but is in Access Point mode, as I only have one CABLE port in the entire house (in my Den - other end of the house from my office) and I have the ORBI and its Satellite to cover my house with WiFi - and provide Wired connections in my office - until I can get up in the attic and run CAT-6 to every room.

  The last time I had any issues with my Internet - one of the COMCAST techs had installed a filter (in the box outside my home --  I should have reported this to the police when I called for service due to severe slow downs and drops - and the tech showed me this device).  Why COMCAST would do this - to force a customer to call in a service request, is beyond me.  Now I know I need to go out there and look for another 'said device' in the box on the side of my HOUSE (which I own).  Then placing a call to the local police and reporting a trespasser and notifying the FCC.  

  I have been working from home since MAR 2020, so I know my usage has gone up - but the 300 MBPs I am paying for - I have never gotten that speed - speed tests of multiple version never show anything higher than 280.  

  The modem is showing what it has always shown - as even though I bought my own - I know that COMCAST puts their own firmware on it.  I have masked part of the MAC and SERIAL (for security)....as well as my current Link-Local address. 

Thanks for the details and I appreciate your feedback. T3 timeout occurs when a ranging response is not received within 200 ms by the cable modem or are possible from bad time offsets, noisy upstream, or disconnected upstream. Upstream problems can contribute to T3 timeouts if a ranging request (RNG-REQ) message isn't received by the CMTS(Headend), therefor a response never gets sent back to the modem. In the end, this can cause slower speeds to upload and download and possibly problems with resets causing the IP to change. The FEC(Forward Error Correction) relates to errors found and these spikes are showing most likely due to the same reason for the T3 timeouts. A large majority of the time these are outside issues and we don't charge to come out and resolve outside issues. 280 Mbps is pretty good and 300 can even be possible, but that would have to checked by sending a technician out as the issue may be slowing it down. Normal amount of T3 timeouts is 0 -10 depending on the signal and any area issues. A visit is a great place to start based on what I see. You can send a direct message with your name and address to get it set up. 

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