Can you use router on a stick using ipv6 stateless

I don't know specifically why virtual machines would be provisioned with subnets narrower than /64. Why would virtual machines be provisioned with subnets narrower than /64? But even if you actually configure a point-to-point link as /127, some people advocate assigning a whole /64 anyway just to be consistent. Such misaddresses packets may be malicious or accidental.

Why is it recommended to use /127 for point to point linksР”Р‡or the specific case of point-to-point links, /127 is recommended instead of /64 in order to avoid a vulnerability where packets addressed to any one of the quadrillions of unused addresses on the subnet cause unwanted neighbour solicitation requests and table entries that could drown a router. For example, there might be some end user devices out there that just assume /64, or else routing subnets narrower than /64 might be inefficient on some routers because the router implementor has optimized the case of /64 or wider routes in order to save routing table memory. Even where SLAAC is not in use, there may be other reasons to use /64. IPv6 subnets are usually /64 because that is required in order for SLAAC (stateless address auto-configuration) to work. Except for some special cases like point to point links, each subnet just simply has way more addresses available than it will ever require, so instead you worry only about allocating subnets, not hosts inside them. You almost never worry about how many IP addresses will be used in a given subnet. In IPv6 you usually think about how many /64- subnets you have available and how you can allocate them to end users. In IPv4 you usually think about how many addresses you have available and how you can allocate enough of them to each end user. The first thing that should be mentioned about IPv6 subnetting is that a different mode of thought is called for. In what other major ways is IPv6 subnetting different from IPv4 subnetting?.Am I wasting too many subnets? Aren't we just going to run out again?.Why do I sometimes see a % rather than a / in an IPv6 address and what does it mean?.Must the subnet be the same for all of them? My interfaces have several IPv6 addresses.Can I map directly from IPv4 subnets to IPv6 subnets? For instance, does an IPv4 /24 correspond directly to an IPv6 /56 or /120?.

Are there other situations in which I would use a subnet smaller than /64?.

Why would virtual machines be provisioned with less than a /64 worth of addresses?.

Why is it recommended to use /127 for point to point links between routers, and why was it recommended against in the past? Should I change existing router links to use /127?.

IPv6 is 128 bits, so why is /64 the smallest recommended subnet for hosts?.

IPv6 seems at first glance to be much more complex than IPv4. I know a lot about IPv4 Subnetting, and as I prepare to (deploy|work on) an IPv6 network I need to know how much of this knowledge is transferable and what I still need to learn. This is a Canonical Question about IPv6 Subnetting. Answers without enough detail may be edited or deleted. Want to improve this post? Provide detailed answers to this question, including citations and an explanation of why your answer is correct.

Can you use router on a stick using ipv6 stateless