4 ms·
Comcast doesn't do CGNAT, and their network has been 100% IPv6-capable for years now.
by jaywalk 5y ago
Comcast doesn't do CGNAT, and their network has been 100% IPv6-capable for years now.
- remuskaos 5y agoHow do ipv6-only customers reach ipv4 hosts? Wouldn't some 6to4 gateway count as CGN? I've had this problem in the past with Vodafone, sometimes their AFTR (?) would go down but all ipv6 enabled hosts were still reachable. Only the ipv4 internet was unreachable. It took months for me to find that out, and I still don't know any workaround in case that happens again.
- wmf 5y agoI think Comcast is running dual-stack so they don't have IPv6-only customers. T-Mobile is running IPv6-only using 464 which is vulnerable to AFTR problems like you saw.
- ninkendo 5y agoThey don’t give IPv6-capable cable modems to everyone. I don’t have one.
- jbrzozowski 5y agoEvery modem provided by Comcast supports dual stack broadband and IPv6 only for management by default. The latter is transparent to customer and is for internal use only. IPv6 only for management has no impact on dual stack broadband. If your modem is in bridge mode (Wi-Fi router functionality disabled) then you need to ensure that your broadband router supports IPv6 specifically DHCPv6 for the acquisition of IA-NA and IA-PD. HTH, John
- deleted 5y ago[deleted]