Spectator

I get an ipv6 now but can't ping out

I was delighted to see that my SB6141 got a firmware upgrade today and that my Mikrotik router had a bound ipv6 prefix.  I messed around a little, and now my computers connected to it have ipv6 addresses (2607:fcc8:etc.).

The problem is that I can't get out of the house with ipv6.
ipv6-test.com tells me I don't have ipv6.

I can't ping a Google DNS server (2001:4860:4860::8888) from the router.

So I am now getting ipv6 addresses, but I can't do anything with them.

This is my traceroute from an external site, starting from the point it hits twc's backbone:

6  twcable-backbone-as7843.10gigabitethernet2.switch1.nyc7.he.net (2001:470:0:2bd::2)  74.850 ms  76.612 ms  76.581 ms
 7  2001:1998:0:4::394 (2001:1998:0:4::394)  80.820 ms 2001:1998:0:4::105 (2001:1998:0:4::105)  78.916 ms 2001:1998:0:4::394 (2001:1998:0:4::394)  76.387 ms
 8  2001:1998:0:4::a4 (2001:1998:0:4::a4)  82.799 ms  82.794 ms  82.930 ms
 9  2001:1998:0:4::ad (2001:1998:0:4::ad)  82.858 ms  83.322 ms  89.117 ms
10  2001:1998:0:8::1f (2001:1998:0:8::1f)  95.110 ms  88.612 ms  96.549 ms
11  2605:a000:0:4::7 (2605:a000:0:4::7)  110.126 ms  109.900 ms  109.970 ms
12  2605:a000:0:4::6:89 (2605:a000:0:4::6:89)  100.967 ms  102.652 ms  100.788 ms
13  2605:a000:0:4::6:5442 (2605:a000:0:4::6:5442)  100.915 ms  100.913 ms  102.244 ms
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Any ideas?

6 REPLIES
Expert

Re: I get an ipv6 now but can't ping out

[ Edited ]

Did you do a repair network connection and did you clear out your cache?

 

Spectrum Employee

Re: I get an ipv6 now but can't ping out

[ Edited ]

If you bypass a computer to the modem directly (wired of course) does it work?

 

Might need to use the "netsh winsock reset" command...

Spoiler
  1. Click on Start button.
  2. Type cmd in the Start Search text box.
  3. Press Ctrl+Shift+Enter keyboard shortcut to run command prompt as Administrator (or right click on the search result and choose the blue & yellow shield saying "Run as Administrator" to allow elevation request.  Choose "yes" if prompted.
  4. Type netsh winsock reset in the Command Prompt shell, and then press the Enter key.
  5. It'll tell you it's resetting the catalog and that you need to restart.  Restart/reboot the computer.


    What netsh winsock reset command does, to get a bit more technical, is it resets Winsock Catalog to a clean state or default configuration. It removes all Winsock LSP (Layered Service Providers) previously installed, including the potential malfunctioned LSP that causes loss of network packets transmission failure. So all previously-installed LSPs must be reinstalled. This command does not affect Winsock Name Space Provider entries.  It does not do any "damage" to internet access (won't break anything), just resets it back to "normal".

It also matters how your router's NAT is configured.  Could be as simple as you forgot to power cycle (reboot) the router after switching to IPv6, so it's all sorts of confused and it can sort it out itself if just is forced to reboot.

My postings on this site are my own, off-the-clock, and don’t necessarily represent TWC’s/Charter's strategies or opinions.
Spectator

Re: I get an ipv6 now but can't ping out

It's two computers and directly pinging from the router, so it's not a Windows thing.

When I got home tonight and did a release/renew, it failed to get bind ipv6, so it appears it was only working temporarily.

It's going to be a chore to hook a computer up to the modem, since it's in another room, and there's no point in doing it now, since I am no longer getting ipv6 addresses.

I'm not using NAT for IPv6.  I'm setting up a firewall in the router (although that was disabled when I was testing this, but I'm going to let the computers pick up IPv6 numbers from the pool with neighbor discovery.  This was working fine earlier, when I wrote the original message.  The computers and the LAN interface on the router had unique IPv6 numbers with the prefix I got through the modem.

 

It appears that the firmware update for my modem removed my ability to reset it remotely.  I can directly load the reset.htm, which is still there, but it doesn't actually reset the modem.

Expert

Re: I get an ipv6 now but can't ping out

[ Edited ]

CraigThom wrote:

 

 

It appears that the firmware update for my modem removed my ability to reset it remotely.  I can directly load the reset.htm, which is still there, but it doesn't actually reset the modem.


You can thank that person who brought up the nonexistent security issue on Cnet for this...

Actually created more problems for people. Now you have to call TWC to reset the modem.

 

 

Lead Moderator

Re: I get an ipv6 now but can't ping out

You can reboot your modem through the My Account website as well. You would want to 

look towards the bottom left hand side of the Overview tab. click on Troubleshoot, select Internet from the drop down and then click Activate/Connect modem. Once the message comes up click Reset My Modem.

 

You can also do a reset by following the other options for troubleshooting as well. 

 

Regards,
Julia R.
^TWC-Social Media Customer Care
Moderator-Community Forums

Seasoned Contributor

Re: I get an ipv6 now but can't ping out


CraigThom wrote:

Any ideas?


Did you request a /56?

Can you reach the /128 from external sites (modulo firewall)?