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A comment on AWS adds an extra 5.5M IPv4 addresses. Parent comment

Re:AWS adds an extra 5.5M IPv4 addresses by jaywalk on Saturday August 14, 2021 @02:33PM (#28182922)
Comcast doesn't do CGNAT, and their network has been 100% IPv6-capable for years now.
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Re:AWS adds an extra 5.5M IPv4 addresses by remuskaos on Saturday August 14, 2021 @02:57PM (#28183089)
How 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.

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Re:AWS adds an extra 5.5M IPv4 addresses by wmf on Saturday August 14, 2021 @03:26PM (#28183293)
I 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.

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Re:AWS adds an extra 5.5M IPv4 addresses by ninkendo on Saturday August 14, 2021 @06:28PM (#28184482)
They don’t give IPv6-capable cable modems to everyone. I don’t have one.
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Re:AWS adds an extra 5.5M IPv4 addresses by jbrzozowski on Monday August 16, 2021 @09:25AM (#28197775)
Every 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

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