20 Dec
2017
20 Dec
'17
7:55 p.m.
On 20 December 2017 at 13:23, Mike <mike-nanog@tiedyenetworks.com> wrote:
in IPv4 for example, when you assign a P2P link with a /30, you are using 2 and wasting 2 addresses. But in IPv6, due to ping-pong and just so many technical manuals and other advices, you are told to "just use a /64' for your point to points.
There are 2^64 *networks* available in IPv6. That's 2^32 times as many *networks* as there are IPv4 *addresses*. That doesn't mean twice as many; that means almost 4.3 BILLION times as many. Yeah, go ahead and use a /64 for your point-to-point networks. Or don't; there are ways to use /128s carved out of a single /64 (I do so on my private VPNs), and then route the whole /64 to my VPN concentrator). -- Harald