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Network Engineering

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    Routers route between different networks, not from a network back to the same network. You want to use a switch, not a router. If you want to use a router, you need a shorter prefix from which you can have a transit network and be able to use IPv6 prefix delegation for other networks. It sounds like you were given a transit network, but need one or more networks for you access network(s). Commented Jun 28, 2021 at 0:16
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    By the way, it is not being cheap because there are plenty of /64 networks. You could get a /60 prefix that would give you a /64 transit network and 15 /64 access networks. I'm guessing the data center guys really do not understand IPv6 or the fact it was designed to waste addressing, and they are trying to apply IPv4 address conservation that is detrimental to IPv6. Commented Jun 28, 2021 at 0:20
  • My infrastructure will hopefully be dual stack (if I can get IPv6 working). I do currently have 3 different switches in my network, but currently my uplinks are both plugged into my two EdgeRouters. It sounds like you're saying I need to put my host onto the same broadcast domain as my uplinks into the datacenter, and use the gateway that my datacenter has provided me as the same gateway for my host. Is that correct? The way my IPv4 network is currently setup, that's not possible. Commented Jun 28, 2021 at 0:29
  • Yes, if you only have one IPv6 network, then that can only be used as your transit network. Just like with IPv4, you need separate networks on each router interface. Routers route packets between networks, but switches switch frames on the same network. Commented Jun 28, 2021 at 0:33
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    No, you want a smaller prefix (32 is smaller than 64). Nothing larger tan 64. Commented Jun 28, 2021 at 0:52