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> One of the ideas of ipv6 was to reduce routing tables That idea was abandoned about 20 years ago. One fairly quickly discovered that hierarchical routing doe

> One of the ideas of ipv6 was to reduce routing tables That idea was abandoned about 20 years ago. One fairly quickly discovered that hierarchical routing does not work well in the real Internet, where redundancy is done on the IP level with everybody and their dog having provider-indepent IP space. > like that the only standard for local ipv6 addresses Which one is the only standard? Link-local, site-local, ULA, or using a non-routed netblock with or without DHCPv6 (or RA)?

est31 4y ago
site-local addresses are deprecated since RFC 3879. Link-local addresses are indeed another standard, but have the very same length problem. You have these horribly long ipv6 addresses... those can't reasonably be parsed by humans... There is no 192.168.* equivalent in ipv6. Why don't we have something like fd00::1 being the router and fd00::2, fd00::3, etc being the devices in the local network, assigned by DHCP. You can absolutely configure your router that way but it is violating a MUST requirement of RFC 4193. That's my point. There is no non-routed netblock where you can just use it for local purposes, outside of the one for SLAAC and the one for ULA, both creating these horribly long monsters of addresses. All the others have purposes attached that are not meant to be used for local networks.
- keiyakins 4y ago
  Why do you care how long the addresses are? That's what DNS is for. Within a link - most home networks are only one, and those are the ones that need to be simplest - there's even mDNS.
  - est31 4y ago
    DNS is great but it is not available in all settings. Eventually you need to type in ip addresses, there are gazillions of workflows where you have to do that.
    - keiyakins 4y ago
      There's only a very few places where typing IP addresses actually makes sense. Configuring DNS is the main one. Trying to isolate problems is another - if you can ping 8.8.8.8 but not google.com you can reasonably infer that the problem is DNS. I really can't think of any others. That latter one is admittedly kind of a pain, but a wallet-sized cheat sheet can solve it for you. Might be a good idea to try to convince vendors to include a reliable entry or two in the hosts file for that purpose? You can always add it yourself for now, when you're on your own workstation.

est31 4y ago

site-local addresses are deprecated since RFC 3879. Link-local addresses are indeed another standard, but have the very same length problem. You have these horribly long ipv6 addresses... those can't reasonably be parsed by humans... There is no 192.168.* equivalent in ipv6. Why don't we have something like fd00::1 being the router and fd00::2, fd00::3, etc being the devices in the local network, assigned by DHCP. You can absolutely configure your router that way but it is violating a MUST requirement of RFC 4193. That's my point. There is no non-routed netblock where you can just use it for local purposes, outside of the one for SLAAC and the one for ULA, both creating these horribly long monsters of addresses. All the others have purposes attached that are not meant to be used for local networks.

keiyakins 4y ago
Why do you care how long the addresses are? That's what DNS is for. Within a link - most home networks are only one, and those are the ones that need to be simplest - there's even mDNS.
- est31 4y ago
  DNS is great but it is not available in all settings. Eventually you need to type in ip addresses, there are gazillions of workflows where you have to do that.
  - keiyakins 4y ago
    There's only a very few places where typing IP addresses actually makes sense. Configuring DNS is the main one. Trying to isolate problems is another - if you can ping 8.8.8.8 but not google.com you can reasonably infer that the problem is DNS. I really can't think of any others. That latter one is admittedly kind of a pain, but a wallet-sized cheat sheet can solve it for you. Might be a good idea to try to convince vendors to include a reliable entry or two in the hosts file for that purpose? You can always add it yourself for now, when you're on your own workstation.