Since getting IPv6 access, I’ve spent a little time looking into IPv6 addresses. So I thought I would share some of that on this blog.
An IPv6 address is 128 bits in length. So there won’t be a shortage anytime soon.
An address can be thought of as having three parts. There’s a prefix, typically assigned by the ISP. Then there’s a portion that can be used on a campus WAN, to distinguish different local subnets. And then there’s the local part which identifies individual computers on the LAN. The local part is often the last 64 bits of the IPv6 address.
In my case, my ISP has assigned a 60 bit prefix. My router has assigned the next 4 bits, which presumably would allow up to 16 subnets. And the last 64 bits are for the LAN portion, and are to be assigned to individual computers on the LAN. Read More…