4 ms·
These are being used as link addresses, they probably aren't even routable within Amazon's network. They probably want the link addresses to be globally unique
by grogers 4y ago
These are being used as link addresses, they probably aren't even routable within Amazon's network. They probably want the link addresses to be globally unique so it simplifies management or so traceroute reverse lookup is easier (e.g. to pinpoint traffic loss). They probably ran out of the other RFC3330 usual suspects or something.
I wouldn't read too much into it. If they are using it in a way that will break if 240/8 is assigned, I'm sure they will fix it quickly.
- yjftsjthsd-h 4y agoWhy wouldn't they use IPv6 for that? Compatibility issues?
- stormbrew 4y agoI think the thing is that if you actually need only 24ish bits worth of addresses for something and it doesn't need to be routable, ipv6 just adds a lot of baseline complexity ipv4 doesn't have unless you go out of your way. Ipv6 isn't just an address extension, it's a whole ass architecture unto itself.
- wmf 4y agoYeah, I don't know how many routers support RFC 5549 and it never seemed to become a best practice.