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[Weaver]

As you yourself point out, this surely can't be a full-on straight hosing type of attack, it would have to be something intentionally rate-limited, or something that is effectively rate limited, limited by the upstream responses?

[Chrysalis]

No idea, I cannot see any other explanation other than someone shoving a ton of traffic at me so I changed the prefix.

[Bowdon]

Do ipv6 allocations happen like ipv4 i.e. dynamic and static allocations?

Or with ipv6 does every customer get a static ipv6 ip address?

[Chrysalis]

That depends on how things are configured by the isp.

Generally customers get a prefix so a load of ip addresses, but it varies from isp to isp if its dynamic allocation or static.

[Weaver]

What Chrysalis said.

Recently ISPs have mostly been handing out a single IPv4 per site and all the hosts have had to share that address, meaning that some types of protocols are unusable apart from in certain special cases. In IPv6, a site gets a /64 set by some mechanism or other, and within that, the hosts either pick their own addresses, or a router hands them out using DHCP. In general how the addresses are chosen within that /64 is down to particular operating systems, although sysadmins can publish their preference.

Given the huge availability of IPv6 addresses, you would hope that the ISP assigns a static block of one /64 to each site, and maybe a wider block per customer. Unless that is the case, the full potential of the IPv6 Internet is wasted.

In my case, I have a /48, static. Within the main /48, one /64 is chosen for my house’s three DSL lines and I have chosen further /64s for mobile devices.