Cox IPv6 working for a time

[stan-qaz]

What city are you in?

If you are having issues with Cox try the DSL Reports Cox HSI forum, there are several Cox folks that monitor the forum and can take a direct hand in solving your problems, even when your local Cox folks are dropping the ball.

https://www.dslreports.com/forum/coxhsi

[MikeV7896]

A helpful hint for the gateway monitoring/dpinger (2.3)… do a traceroute to a couple of hosts... hopefully your second (third, if you do it from a PC on your LAN) hop is the same for all (or at least most) of them. Configure the gateway to use that next hop host instead of the default gateway... that way you take out link-local/NDP from the "is it up?" test. I recommend doing this for both IPv4 and v6, though IPv4 doesn't have the link-local fallback like IPv6 does for a default gateway.

Some might say that it's better to ping a host on the internet instead of within your ISP's local network... that way you can tell if your ISP is having internet connectivity issues. If you had multi-WAN, and needed to fail over to a backup WAN when internet connectivity is lost (meaning there's an issue on the ISP's end), this might be helpful... but with only one ISP and WAN connection, I prefer to see what kind of latency is present between me and my ISP, rather than latency on the internet.

[mmiller7]

Was this ever resolved?  If so, how?

I've got Cox and I have the EXACT thing you're describing.

[ohwell]

It appears to be mostly fixed. Fixed enough that I can leave IPv6 enabled and it works for weeks/months. But, Cox still manages to break it once in a while which can require either resetting the WAN interface or rebooting to fix. It helps to have shorter internal network SLAAC and DHCPv6 life times.

[Derelict]

Cox IPv6 here in Las Vegas has been solid as a rock. /56 PD. They are even honoring the DUID and my /56 has not changed despite a couple firewall swaps, cable modem changes, and about a half-dozen new IPv4 assignments.


[the_MiCrO]

Try this:
Open 'Wan interface' click 'save' and click 'apply', wait 1 minute
Is IPv6 restored?
Yes: https://redmine.pfsense.org/issues/7330

[Derelict]

To my knowledge there is no PPPoE on Cox, so that issue would not apply here.

Edit/Save WAN is required to make changes to what interfaces are tracking WAN though.

[maverick_slo]

I don't think that dhcp/pppoe makes difference.
Your config uses same dhcpv6 client…
Can you test my scenario in my thread here on forums? In ipv6 section...
Thanks.

[Derelict]

I have never seen the PD, etc go away from them so I can't check it here.

[maverick_slo]

Ahh ok I hope some of devs have access to pd setup somewhere… Otherwise I can make it available to collect necessary things...