This configuration helps to test ipv6 support on IoT device middleware. Commands test on Debian9 VMs.
- client-configuration.md. Client (=IoT device) should be configured to use IPv6.
- router-configuration.md. Router (=intermediate device) serves as IPv6 gateway that does DNS64 and NAT64 translation.
- Private ipv6 block fd00::/8 is used in the examples (RFC 4193).
- 64:ff9b:: is reserved for address translation (RFC 8215) and used on the router.
Router serves as IPv4 to IPv6 translator and IPv4 gateway for the client.
| Client (IPv6) | Router (ipv6 and ipv4) | WAN | ||
|---|---|---|---|---|
| fd:0:0:1::5/96 | <-> | LAN: fd:0:0:1::1/96 -NAT64- WAN: ipv4 home dhcp? | -> | Home ipv4 network with internet |
| Default gw: Router | Default ipv4 gw: Home network | - | ||
| Static route: 64:ff9b:: to Router | ||||
| DNS: Router | DNS64 (default: all translated) | - |
In this case Router should only translate IPv4 DNS and leave IPv6 responces intact. Client will be able to access pure IPv6 resources using home internet. Router serves as IPv4 to IPv6 translator, IPv6 gateway, and IPv4 gateway for the client.
It is also possible to decouple DNS64 and NAT64 functions and run them on different hosts (NAT64 host will be the traffic gateway, while DNS64 host will be set as a DNS server in Client's resolv.conf only).
| Client (IPv6) | Router (ipv6 and ipv4) | WAN | ||
|---|---|---|---|---|
| fd:0:0:1::5/96 | <-> | LAN: fd:0:0:1::1/96 -NAT64- WAN: ipv6 home dhcp? | -> | Home ipv6 network |
| WAN2 ipv4 home dhcp? | -> | Home ipv4 network | ||
| Default gw: Router | Default ipv6 gw: Home ipv6 network | |||
| Static route: 64:ff9b:: to Router | ||||
| Default ipv4 gw: Home ipv4 network | ||||
| DNS: Router | DNS64 (enable dual-stack. see config comments) | - |
Note: You can replace network fd00:: with your private home ipv6 network and connect client and router to the same switch instead of direct connection
- Static=Manual (this example by default uses static addresses)
- SLAAC (Stateless autoconfiguration, most commont). See address-assignment-1-stateless-auto.md
- DHCPv6 stateless. See address-assignment-2-dhcpv6-stateless.md
- DHCPv6 stateful. See address-assignment-3-dhcpv6-stateful.md
Read more about packet exchange for each assignment option: Troubleshoot IPv6 Dynamic Address Assignment with Cisco Router and Microsoft Windows PC