Monostack, but how? Let's get technical.
At a high-level every large network that wants to go Monostack needs to take four steps: deploy packet translation, take traffic control, gain visibility and turn off IPv4.
Details vary depending on the type of network, so let's say we're dealing with a typical Home/Office/Corperate LAN. To start going Monostack right now while using only FLOSS capable networking technicians can follow this path:
1. Deploy Packet Translation
Start by deploying a NAT64 packet translator to (grudgingly) make legacy IP reachable via IPv6, optionally exposing services to the legacy side using SIIT-DC or static NAT64 BIB "port forwarding".
2. Take Control of traffic
Configure DNS64 on recursive resolvers and PREF64 on gateways to gently encourage clients to use the NAT64 packet translator. Finally enable IPv6-mostly on DHCPv4 servers to to disable legacy IP assignment on systems that support CLAT or pure Monostack operation.
ISPs! Additionaly our DeLegacy RPZ DNS rewrite ruleset can help hoist large amounts of wayward CDN traffic onto native IPv6 more forcefully to unload NAT64 and consequently legacy transit.
Implementations:
3. Gain Visibility
To know the IPv6 upgrade is complete we need to see it working. Network monitoring helps to see legacy traffic going away without user complaints or an increase in error rates.
While legacy traffic remains iterate on "taking control" by speaking with device, OS and service vendors about IPv6 support. The Monostack community is here to help you! Tell us what legacy traffic sources remain and who to blame.
4. Turn off IPv4 in the core
Huh. At this point is it even still doing anything?
Once IPv4 is out of the core network edge where we can forget about it once it's no longer useful.
Admittedly this last step is easier said than done for things other than end-user devices, many pieces of vendor networking kit as well as shitty IoT devices break in surprisingly hillarious ways when IPv4 is no longer configured. Network operators: We want to hear your war stories on that front, talk to us, we think we can ease that pain.