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Comment by y0ghur7_xxx | Hacker News Reader

I deployed a dual ipv4 + ipv6 stack on my home lan a few years ago. I got myself a /48 from hurricane electric, and did everything like it's in the book: SLAAC for subnets, fixed addresses on servers, every device had a public ipv6 and the firewall allowed or denied stuff. Everything worked as it should work. One day something stopped working on the he tunnel, and as I was about to debug what went wrong, I just asked myself "Why am I doing this? My ISP has no ipv6, every site I visit has an ipv4 address, why am I keeping all this ipv6 stuff on? I don't need it. It's just useless work". And so I reverted everything to ipv4 and I am happy since. Less work for me.

I see NO reason to deploy ipv6 at the moment. I don't see it for home lans, I don't see it for my workplace, I don't see it for bigger enterprises.

But you can have a gazillion IPs with ipv6!! Yeah, so what?

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> I deployed a dual ipv4 + ipv6 stack on my home lan a few years ago. I got myself a /48 from hurricane electric, and did everything like it's in the book: SLAAC for subnets, fixed addresses on servers, every device had a public ipv6 and the firewall allowed or denied stuff. Everything worked as it should work. One day something stopped working on the he tunnel

If your IPv4 address changes, you need to re-start the tunnel.

I ran a setup like this, but since the closest HE tunnelbroker end-point was 180+ms away I configured radvd to only advertise to the RIPE Atlas probe I was running at the time, so only my gateway/firewall and the Atlas probe were IPv6 enabled.

My ISP can't enable IPv6 because the last-mile ISP, who does layer-3 hand-over uses half-duplex MPLS VPNs for traffic hand-over (separate VPNs for each ISP), and the equipment (Cisco and Alcatel-Lucent BNGs) in use doesn't support Half-Duplex VRF for IPv6 (only IPv4). I am not aware of another last-mile fixed-line provider (there are quite a few here) that supports IPv6 at all. When I enquired with one of them, they indicated that it was on their roadmap (or backlog, they didn't have any idea of timeline ...).

"You can have a gazillion IP addresses with IPv6" isn't necessarily that interesting, but "You can have one IP address with IPv6", or "You can have on IP address per device with IPv6", or "You can get rid of NAT with IPv6", are very interesting.

IPv6 brings some pretty nice features in terms of network engineering.

the major one is a vastly smaller BGP routing table, which is becoming more and more of an issue.[1]

We need IPv6 to remove the horrible IPV4 space fragmentation.

http://bgphelp.com/2017/01/01/bgpsize/

> the major one is a vastly smaller BGP routing table, which is becoming more and more of an issue.

But that's not a problem for me. It's a problem for my isp. And if he does not care, why should I?

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