the_information_nexus/tech_docs/lab/ipv6_lab.md

graph TD
  %% Host and Bridges
  subgraph Host_Machine_LXD
    H0[LXD Host]
    H0 --> B1[br-lan - IPv4/IPv6 LAN]
    H0 --> B2[br-wan - Simulated WAN]
  end

  %% LAN Zone
  subgraph LAN_Zone
    B1 --> R1[Router - VyOS/Ubuntu (radvd, DHCPv6, NAT64)]
    R1 --> C1[Client1 - IPv6-only]
    R1 --> C2[Client2 - Dual-Stack]
    R1 --> C3[Client3 - IPv4-only]
    R1 --> S1[WebServer - Dual-Stack NGINX + DNS]
  end

  %% WAN Zone
  subgraph WAN_Zone
    B2 --> ISP[ISP Router (simulated)]
    ISP --> EXT[External IPv6 Service]
  end

  %% Logical Routing
  R1 --> ISP
  C1 --> R1
  C2 --> R1
  C3 --> R1