{"id":12801,"date":"2026-03-13T07:25:11","date_gmt":"2026-03-13T07:25:11","guid":{"rendered":"https:\/\/developer.rdkcentral.com\/documentation\/?page_id=12801"},"modified":"2026-03-13T07:27:06","modified_gmt":"2026-03-13T07:27:06","slug":"dhcp-client-manager-architecture","status":"publish","type":"page","link":"https:\/\/developer.rdkcentral.com\/documentation\/documentation\/rdk_broadband_documentation\/components\/dhcp-client-manager\/dhcp-client-manager-architecture\/","title":{"rendered":"DHCP Client Manager Architecture"},"content":{"rendered":"\n

Component Overview<\/p>\n\n\n\n

 The DHCP Client Manager architecture is designed around a modular, event-driven approach that provides centralized management of DHCP operations while maintaining clear separation of concerns between different functional areas.

High-Level Architecture<\/p>\n\n\n\n

\ngraph TB\n    %% Application Layer - Blue theme\n    subgraph APP [\" \"]\n        direction TB\n        TR181[TR-181 Data Model]:::appStyle\n        RBUS[RBUS\/DBUS Interface]:::appStyle\n        MGMT[Management APIs]:::appStyle\n    end\n    \n    %% DHCP Manager Core - Green theme\n    subgraph CORE [\" \"]\n        direction TB\n        CONTROLLER[Main Controller]:::coreStyle\n        MONITOR[Lease Monitor]:::coreStyle\n        RECOVERY[Recovery Handler]:::coreStyle\n    end\n    \n    %% Protocol Handlers - Orange theme\n    subgraph HANDLERS [\" \"]\n        direction TB\n        V4HANDLER[DHCPv4 Handler]:::handlerStyle\n        V6HANDLER[DHCPv6 Handler]:::handlerStyle\n        MAPT[MAP-T Processor]:::handlerStyle\n    end\n    \n    %% External Clients - Purple theme\n    subgraph CLIENTS [\" \"]\n        direction LR\n        subgraph V4CLIENT [\" \"]\n            UDHCPC[udhcpc Client]:::clientStyle\n            V4PLUGIN[udhcpc Plugin]:::pluginStyle\n        end\n        subgraph V6CLIENT [\" \"]\n            DIBBLER[dibbler Client]:::clientStyle\n            V6PLUGIN[dibbler Plugin]:::pluginStyle\n        end\n    end\n    \n    %% System Integration - Gray theme\n    subgraph SYSTEM [\" \"]\n        direction TB\n        NETIF[Network Interfaces]:::systemStyle\n        SYSEVENT[System Events]:::systemStyle\n        WAN[WAN Manager]:::systemStyle\n    end\n    \n    %% Main control flow - thick lines\n    TR181 -.->|Config| CONTROLLER\n    RBUS -.->|Commands| CONTROLLER\n    MGMT -.->|API Calls| CONTROLLER\n    \n    %% Core coordination\n    CONTROLLER ==>|Control| V4HANDLER\n    CONTROLLER ==>|Control| V6HANDLER\n    CONTROLLER ==>|Monitor| RECOVERY\n    \n    %% Lease monitoring flow\n    MONITOR ==>|Lease Updates| CONTROLLER\n    V4PLUGIN -->|IPC| MONITOR\n    V6PLUGIN -->|IPC| MONITOR\n    \n    %% Client management\n    V4HANDLER ==>|Start\/Stop| UDHCPC\n    V6HANDLER ==>|Start\/Stop| DIBBLER\n    V6HANDLER -->|Process| MAPT\n    \n    %% Plugin execution\n    UDHCPC -->|Execute| V4PLUGIN\n    DIBBLER -->|Execute| V6PLUGIN\n    \n    %% System integration\n    V4HANDLER -->|Configure| NETIF\n    V6HANDLER -->|Configure| NETIF\n    V4HANDLER -->|Notify| SYSEVENT\n    V6HANDLER -->|Notify| SYSEVENT\n    CONTROLLER -->|Status| WAN\n    \n    %% Styling\n    classDef appStyle fill:#e1f5fe,stroke:#0277bd,stroke-width:2px,color:#000\n    classDef coreStyle fill:#e8f5e8,stroke:#2e7d32,stroke-width:3px,color:#000\n    classDef handlerStyle fill:#fff3e0,stroke:#f57c00,stroke-width:2px,color:#000\n    classDef clientStyle fill:#f3e5f5,stroke:#7b1fa2,stroke-width:2px,color:#000\n    classDef pluginStyle fill:#ede7f6,stroke:#5e35b1,stroke-width:2px,color:#000\n    classDef systemStyle fill:#f5f5f5,stroke:#616161,stroke-width:2px,color:#000\n    \n    %% Group styling\n    APP ~~~ CORE\n    CORE ~~~ HANDLERS\n    HANDLERS ~~~ CLIENTS\n    CLIENTS ~~~ SYSTEM<\/pre><\/div>\n\n\n\n

 Component Responsibilities<\/p>\n\n\n\n
\"\"\/<\/figure>\n\n\n\n
Figure 1: DHCP Manager Component Block Diagram – Shows the main components and their interactions within the RDK-B DHCP Management system<\/em><\/p>\n\n\n\n
Main Controller<\/h3>\n\n\n\n
    \n
  • Central Coordination<\/strong>: Orchestrates all DHCP client operations<\/li>\n\n\n\n
  • State Management<\/strong>: Maintains client operational states<\/li>\n\n\n\n
  • Interface Monitoring<\/strong>: Tracks network interface status<\/li>\n\n\n\n
  • Configuration Management<\/strong>: Processes TR-181 configuration changes<\/li>\n\n\n\n
  • Error Handling<\/strong>: Implements recovery and error handling strategies<\/li>\n\n\n\n
  • Process Monitoring<\/strong>: Monitors DHCP client process health<\/li>\n<\/ul>\n\n\n\n
    Lease Monitor<\/strong><\/p>\n\n\n\n
      \n
    • IPC Server<\/strong>: Receives lease updates from DHCP client plugins<\/li>\n\n\n\n
    • Message Routing<\/strong>: Routes lease information to appropriate handlers<\/li>\n\n\n\n
    • Protocol Detection<\/strong>: Identifies DHCPv4 vs DHCPv6 messages<\/li>\n\n\n\n
    • Fast Processing<\/strong>: Minimal latency message processing<\/li>\n<\/ul>\n\n\n\n
      Protocol(Lease) Handlers<\/strong><\/p>\n\n\n\n
        \n
      • DHCPv4 Handler<\/strong>: Processes IPv4 lease information and network configuration<\/li>\n\n\n\n
      • DHCPv6 Handler<\/strong>: Processes IPv6 lease information including IANA\/IAPD<\/li>\n\n\n\n
      • MAP-T Processor<\/strong>: Handles IPv4-over-IPv6 transition technology<\/li>\n<\/ul>\n\n\n\n
        Recovery Handler<\/h3>\n\n\n\n
          \n
        • Persistence<\/strong>: Stores lease information for system restart recovery<\/li>\n\n\n\n
        • State Restoration<\/strong>: Restores system state after crashes or restarts<\/li>\n<\/ul>\n\n\n\n
          Data Flow Architecture<\/p>\n\n\n\n
          sequenceDiagram\n    participant CONFIG as TR-181 Config\n    participant CONTROLLER as Main Controller\n    participant CLIENT as DHCP Client\n    participant PLUGIN as Client Plugin\n    participant HANDLER as Lease Handler\n    participant SYSTEM as System\/Network\n    \n    CONFIG->>CONTROLLER: Configuration Change\n    CONTROLLER->>CLIENT: Start\/Configure Client\n    CLIENT->>CLIENT: Acquire Lease\n    CLIENT->>PLUGIN: Execute Plugin\n    PLUGIN->>CONTROLLER: Send Lease Info (IPC)\n    Note over CONTROLLER: IPC Monitoring<br\/>handled internally\n    CONTROLLER->>HANDLER: Process Lease\n    HANDLER->>SYSTEM: Configure Network\n    HANDLER->>CONFIG: Update TR-181 Status\n    HANDLER->>CONTROLLER: Processing Complete<\/pre><\/div>\n\n\n\n

          Threading Model
          Thread Architecture<\/strong><\/p>\n\n\n\n
          graph TB\n    %% Main Process - Green theme\n    subgraph PROCESS [\" \"]\n        direction TB\n        MAIN[Main Thread]:::mainStyle\n        RBUS_T[RBUS Thread<br\/>\u2022 TR-181 Operations<br\/>\u2022 Client Enable\/Disable<br\/>\u2022 Configuration Updates]:::rbusStyle\n        CONTROLLER_T[Controller Thread<br\/>\u2022 Client Management<br\/>\u2022 Lease Monitoring<br\/>\u2022 Recovery Operations]:::coreStyle\n    end\n    \n    %% External Processes - Purple theme\n    subgraph EXTERNAL [\" \"]\n        direction LR\n        subgraph CLIENTS [\" \"]\n            UDHCPC_P[udhcpc Process]:::clientStyle\n            DIBBLER_P[dibbler Process]:::clientStyle\n        end\n        subgraph PLUGINS [\" \"]\n            PLUGIN_P[Plugin Processes]:::pluginStyle\n        end\n    end\n    \n    %% Thread coordination\n    MAIN ==>|Initialize & Start| RBUS_T\n    MAIN ==>|Initialize & Start| CONTROLLER_T\n    \n    %% RBUS to Controller communication\n    RBUS_T ==>|Enable\/Disable Commands| CONTROLLER_T\n    RBUS_T -.->|Configuration Changes| CONTROLLER_T\n    CONTROLLER_T -.->|Status Updates| RBUS_T\n    \n    %% Process management\n    CONTROLLER_T ==>|Spawn\/Control| UDHCPC_P\n    CONTROLLER_T ==>|Spawn\/Control| DIBBLER_P\n    \n    %% Plugin execution\n    UDHCPC_P -->|Execute| PLUGIN_P\n    DIBBLER_P -->|Execute| PLUGIN_P\n    \n    %% IPC communication (handled by controller)\n    PLUGIN_P -->|IPC Messages| CONTROLLER_T\n    \n    %% Recovery operations (part of controller loop)\n    CONTROLLER_T -.->|Monitor\/Recover| UDHCPC_P\n    CONTROLLER_T -.->|Monitor\/Recover| DIBBLER_P\n    \n    %% Styling\n    classDef mainStyle fill:#e3f2fd,stroke:#1976d2,stroke-width:3px,color:#000\n    classDef rbusStyle fill:#fff8e1,stroke:#ff8f00,stroke-width:3px,color:#000\n    classDef coreStyle fill:#e8f5e8,stroke:#2e7d32,stroke-width:3px,color:#000\n    classDef clientStyle fill:#f3e5f5,stroke:#7b1fa2,stroke-width:2px,color:#000\n    classDef pluginStyle fill:#ede7f6,stroke:#5e35b1,stroke-width:2px,color:#000\n    \n    %% Group spacing\n    PROCESS ~~~ EXTERNAL<\/pre><\/div>\n\n\n\n
          Thread Responsibilities<\/h3>\n\n\n\n
          Main Thread<\/h4>\n\n\n\n
            \n
          • Initialization<\/strong>: System startup and component initialization<\/li>\n\n\n\n
          • Signal Handling<\/strong>: Process system signals and shutdown<\/li>\n\n\n\n
          • Thread Management<\/strong>: Initialize and start RBUS and controller threads<\/li>\n\n\n\n
          • System Coordination<\/strong>: Coordinate between different threads during startup\/shutdown<\/li>\n<\/ul>\n\n\n\n
            RBUS Thread<\/h4>\n\n\n\n
            The RBUS thread handles all TR-181 Data Model operations and external management interface:<\/p>\n\n\n\n
              \n
            • TR-181 Operations<\/strong>: Handle all data model get\/set operations<\/li>\n\n\n\n
            • RBUS Management<\/strong>: Manage RBUS\/DBUS communications and subscriptions<\/li>\n\n\n\n
            • Client Control Commands<\/strong>: Process enable\/disable commands for DHCP clients<\/li>\n\n\n\n
            • Configuration Management<\/strong>: Handle configuration changes from external management<\/li>\n\n\n\n
            • Status Reporting<\/strong>: Report client status and lease information to TR-181 data model<\/li>\n\n\n\n
            • Parameter Validation<\/strong>: Validate configuration parameters before applying<\/li>\n\n\n\n
            • Event Notifications<\/strong>: Generate TR-181 events for configuration and status changes<\/li>\n<\/ul>\n\n\n\n
              Controller Thread<\/h4>\n\n\n\n
              The controller thread is the primary worker thread that handles all core DHCP management operations:<\/p>\n\n\n\n
                \n
              • Client Management<\/strong>: Start\/stop\/configure DHCP clients based on RBUS commands<\/li>\n\n\n\n
              • Lease Processing<\/strong>: Process lease updates from plugins via IPC<\/li>\n\n\n\n
              • State Monitoring<\/strong>: Monitor interface and client states<\/li>\n\n\n\n
              • Configuration Updates<\/strong>: Apply configuration changes received from RBUS thread<\/li>\n\n\n\n
              • Recovery Operations<\/strong>: Called as APIs before the main controller loop\n
                  \n
                • Process health checking and restart operations<\/li>\n\n\n\n
                • Lease recovery from persistent storage<\/li>\n\n\n\n
                • System state restoration after crashes<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                • IPC Listening<\/strong>: Listen for plugin messages on the IPC socket<\/li>\n\n\n\n
                • Message Processing<\/strong>: Parse and validate lease messages from plugins<\/li>\n\n\n\n
                • Data Routing<\/strong>: Route processed messages to appropriate handlers<\/li>\n\n\n\n
                • Error Handling<\/strong>: Handle communication and operational errors<\/li>\n<\/ul>\n\n\n\n

                  Message Flow Patterns<\/p>\n\n\n\n
                  Lease Acquisition Flow<\/strong><\/p>\n\n\n\n
                  graph TD\n    START[Interface Up] --> CHECK{Interface Ready?}\n    CHECK -->|No| WAIT[Wait for Ready]\n    WAIT --> CHECK\n    CHECK -->|Yes| START_CLIENT[Start DHCP Client]\n    START_CLIENT --> DISCOVER[DHCP Discover\/Solicit]\n    DISCOVER --> RESPONSE{Server Response?}\n    RESPONSE -->|No| TIMEOUT[Timeout\/Retry]\n    TIMEOUT --> DISCOVER\n    RESPONSE -->|Yes| PLUGIN[Execute Plugin]\n    PLUGIN --> IPC[Send IPC Message]\n    IPC --> PROCESS[Process Lease]\n    PROCESS --> CONFIGURE[Configure Interface]\n    CONFIGURE --> UPDATE[Update TR-181]\n    UPDATE --> COMPLETE[Complete]<\/pre><\/div>\n\n\n\n
                  Error Recovery Flow<\/h3>\n\n\n\n
                  graph TD\n    ERROR[Error Detected] --> TYPE{Error Type?}\n    TYPE -->|Process Died| RESTART[Restart Client]\n    TYPE -->|Config Error| RECONFIG[Reconfigure Client]\n    TYPE -->|Network Error| RETRY[Retry Operation]\n    TYPE -->|Critical Error| DISABLE[Disable Client]\n    \n    RESTART --> CHECK[Check Recovery]\n    RECONFIG --> CHECK\n    RETRY --> CHECK\n    \n    CHECK --> SUCCESS{Recovery OK?}\n    SUCCESS -->|Yes| NORMAL[Normal Operation]\n    SUCCESS -->|No| ESCALATE[Escalate Error]\n    \n    DISABLE --> LOG[Log Error]\n    ESCALATE --> LOG\n    LOG --> COMPLETE[Complete]\n    NORMAL --> COMPLETE<\/pre><\/div>\n\n\n\n
                  Interface Architecture<\/h2>\n\n\n\n
                  Network Interface Integration<\/strong><\/p>\n\n\n\n
                  graph TB\n    %% Network Stack - Blue theme\n    subgraph STACK [\" \"]\n        direction TB\n        KERNEL[Kernel Network]:::kernelStyle\n        NETDEV[Network Devices]:::netStyle\n        ROUTES[Routing Table]:::netStyle\n        DNS[DNS Configuration]:::netStyle\n    end\n    \n    %% DHCP Manager - Green theme (limited scope)\n    subgraph DHCP [\" \"]\n        direction TB\n        CONTROLLER[Controller]:::coreStyle\n        V4HANDLER[DHCPv4 Handler<br\/>\u2022 Interface IP Config<br\/>\u2022 Lease Processing]:::handlerStyle\n        V6HANDLER[DHCPv6 Handler<br\/>\u2022 Interface IPv6 Config<br\/>\u2022 Prefix Assignment]:::handlerStyle\n    end\n    \n    %% WAN Manager - Orange theme (system integration)\n    subgraph WAN_MGR [\" \"]\n        direction TB\n        WAN[WAN Manager<br\/>\u2022 Default Routes<br\/>\u2022 DNS Configuration<br\/>\u2022 Firewall Rules]:::wanStyle\n        SYSEVENT[System Events]:::systemStyle\n    end\n    \n    %% System Integration - Gray theme\n    subgraph INTEGRATION [\" \"]\n        direction TB\n        FIREWALL[Firewall]:::systemStyle\n        ROUTING[Routing Daemon]:::systemStyle\n    end\n    \n    %% DHCP Manager - Interface only configuration\n    CONTROLLER ==>|Interface Control| NETDEV\n    V4HANDLER ==>|Configure Interface IP| NETDEV\n    V6HANDLER ==>|Configure Interface IPv6| NETDEV\n    \n    %% DHCP Manager - Lease status reporting\n    V4HANDLER -->|Lease Status| SYSEVENT\n    V6HANDLER -->|Lease Status| SYSEVENT\n    \n    %% WAN Manager - System configuration\n    WAN ==>|Default Routes| ROUTES\n    WAN ==>|DNS Servers| DNS\n    WAN ==>|Firewall Rules| FIREWALL\n    WAN -->|Route Updates| ROUTING\n    \n    %% Event-driven integration\n    SYSEVENT ==>|Lease Events| WAN\n    \n    %% Kernel interaction\n    NETDEV -.->|Interface State| KERNEL\n    ROUTES -.->|Kernel Routes| KERNEL\n    DNS -.->|Resolver Config| KERNEL\n    \n    %% Styling\n    classDef kernelStyle fill:#e8eaf6,stroke:#3f51b5,stroke-width:3px,color:#000\n    classDef netStyle fill:#e1f5fe,stroke:#0277bd,stroke-width:2px,color:#000\n    classDef coreStyle fill:#e8f5e8,stroke:#2e7d32,stroke-width:3px,color:#000\n    classDef handlerStyle fill:#e8f5e8,stroke:#2e7d32,stroke-width:2px,color:#000\n    classDef wanStyle fill:#fff3e0,stroke:#f57c00,stroke-width:3px,color:#000\n    classDef systemStyle fill:#f5f5f5,stroke:#616161,stroke-width:2px,color:#000\n    \n    %% Group spacing\n    STACK ~~~ DHCP\n    DHCP ~~~ WAN_MGR\n    WAN_MGR ~~~ INTEGRATION<\/pre><\/div>\n\n\n\n

                   TR-181 Integration Points<\/strong><\/p>\n\n\n\n
                  The DHCP Manager integrates with TR-181 at multiple levels:<\/p>\n\n\n\n
                  Configuration Parameters<\/h4>\n\n\n\n
                    \n
                  • Device.DHCPv4.Client.{i}.*<\/code>\u00a0– DHCPv4 client configuration<\/li>\n\n\n\n
                  • Device.DHCPv6.Client.{i}.*<\/code>\u00a0– DHCPv6 client configuration<\/li>\n\n\n\n
                  • Custom vendor parameters and extensions<\/li>\n<\/ul>\n\n\n\n
                    Status Parameters<\/p>\n\n\n\n
                      \n
                    • Lease information and status<\/li>\n\n\n\n
                    • Client operational state<\/li>\n\n\n\n
                    • Error conditions and diagnostics<\/li>\n\n\n\n
                    • Performance metrics<\/li>\n<\/ul>\n\n\n\n
                      Operational Commands<\/p>\n\n\n\n
                        \n
                      • Client enable\/disable operations<\/li>\n\n\n\n
                      • Lease renewal commands<\/li>\n\n\n\n
                      • Reset and restart operations<\/li>\n\n\n\n
                      • Diagnostic commands<\/li>\n<\/ul>\n\n\n\n
                        Security Architecture<\/p>\n\n\n\n
                        Process Isolation<\/strong><\/p>\n\n\n\n
                        graph TB\n    %% Privileged Context - Red theme (highest privilege)\n    subgraph PRIVILEGED [\" \"]\n        direction TB\n        MANAGER[DHCP Manager]:::privilegedStyle\n        CONTROLLER[Controller]:::privilegedStyle\n    end\n    \n    %% Network Context - Blue theme (network operations)\n    subgraph NETWORK [\" \"]\n        direction LR\n        UDHCPC[udhcpc Client]:::networkStyle\n        DIBBLER[dibbler Client]:::networkStyle\n    end\n    \n    %% Plugin Context - Purple theme (plugin execution)\n    subgraph PLUGIN [\" \"]\n        direction LR\n        V4PLUGIN[udhcpc Plugin]:::pluginStyle\n        V6PLUGIN[dibbler Plugin]:::pluginStyle\n    end\n    \n    %% System Context - Orange theme (system resources)\n    subgraph SYSTEM [\" \"]\n        direction TB\n        NETCONFIG[Network Config]:::systemStyle\n        FILESYSTEM[File System]:::systemStyle\n    end\n    \n    %% Control flows (privileged to network)\n    MANAGER ==>|Manage| CONTROLLER\n    CONTROLLER ==>|Control| UDHCPC\n    CONTROLLER ==>|Control| DIBBLER\n    \n    %% Plugin execution flows\n    UDHCPC -->|Execute| V4PLUGIN\n    DIBBLER -->|Execute| V6PLUGIN\n    \n    %% Plugin communication (isolated)\n    V4PLUGIN -.->|IPC| MANAGER\n    V6PLUGIN -.->|IPC| MANAGER\n    \n    %% System resource access (privileged only)\n    CONTROLLER ==>|Configure| NETCONFIG\n    CONTROLLER ==>|Persist| FILESYSTEM\n    \n    %% Security boundaries (dotted lines)\n    NETCONFIG -.->|Read-only| UDHCPC\n    NETCONFIG -.->|Read-only| DIBBLER\n    \n    %% Styling\n    classDef privilegedStyle fill:#ffebee,stroke:#c62828,stroke-width:3px,color:#000\n    classDef networkStyle fill:#e3f2fd,stroke:#1976d2,stroke-width:2px,color:#000\n    classDef pluginStyle fill:#f3e5f5,stroke:#7b1fa2,stroke-width:2px,color:#000\n    classDef systemStyle fill:#fff3e0,stroke:#f57c00,stroke-width:2px,color:#000\n    \n    %% Group spacing\n    PRIVILEGED ~~~ NETWORK\n    NETWORK ~~~ PLUGIN\n    PLUGIN ~~~ SYSTEM<\/pre><\/div>\n\n\n\n
                        DHCP Protocol Sequences<\/h2>\n\n\n\n
                        DHCPv4 Sequence Flow<\/strong><\/p>\n\n\n\n
                        \"\"\/<\/figure>\n\n\n\n
                        Figure 2: DHCPv4 Sequence Diagram – Shows the complete DHCPv4 lease acquisition and processing flow from client startup through network configuration<\/em><\/p>\n\n\n\n
                        The DHCPv4 sequence illustrates the interaction between the DHCP Manager, udhcpc client, and the udhcpc plugin during lease acquisition:<\/p>\n\n\n\n
                          \n
                        1. Client Initialization<\/strong>: Main controller starts udhcpc client based on TR-181 configuration<\/li>\n\n\n\n
                        2. DHCP Discovery<\/strong>: udhcpc performs standard DHCP discovery process (DISCOVER\/OFFER\/REQUEST\/ACK)<\/li>\n\n\n\n
                        3. Plugin Execution<\/strong>: Upon lease acquisition, udhcpc executes the plugin with lease information<\/li>\n\n\n\n
                        4. IPC Communication<\/strong>: Plugin sends lease data to the controller via IPC<\/li>\n\n\n\n
                        5. Lease Processing<\/strong>: Controller processes the lease and updates interface configuration<\/li>\n\n\n\n
                        6. Interface Configuration<\/strong>: Interface is configured with IP address and interface-specific settings<\/li>\n\n\n\n
                        7. System Events<\/strong>: Lease status events are sent to system for WAN Manager processing<\/li>\n\n\n\n
                        8. WAN Manager Integration<\/strong>: WAN Manager handles default routes, DNS, and firewall configuration<\/li>\n\n\n\n
                        9. Status Update<\/strong>: TR-181 data model is updated with current lease information<\/li>\n<\/ol>\n\n\n\n
                          DHCPv6 Sequence Flow

                          \"\"<\/h3>\n\n\n\n
                          Figure 3: DHCPv6 Sequence Diagram – Shows the complete DHCPv6 lease acquisition and processing flow including IANA and IAPD handling<\/em><\/p>\n\n\n\n
                          The DHCPv6 sequence demonstrates the more complex IPv6 lease acquisition process:<\/p>\n\n\n\n
                            \n
                          1. Client Initialization<\/strong>: Main controller starts dibbler client with IPv6-specific configuration<\/li>\n\n\n\n
                          2. DHCPv6 Solicitation<\/strong>: dibbler performs DHCPv6 solicitation process (SOLICIT\/ADVERTISE\/REQUEST\/REPLY)<\/li>\n\n\n\n
                          3. Dual Association<\/strong>: Handles both IANA (Identity Association for Non-temporary Addresses) and IAPD (Identity Association for Prefix Delegation)<\/li>\n\n\n\n
                          4. Plugin Execution<\/strong>: dibbler executes the plugin with comprehensive IPv6 lease information<\/li>\n\n\n\n
                          5. IPC Communication<\/strong>: Plugin sends detailed IPv6 lease data including addresses and prefixes<\/li>\n\n\n\n
                          6. Lease Processing<\/strong>: Controller processes both address assignments and prefix delegations<\/li>\n\n\n\n
                          7. Interface Configuration<\/strong>: Interface is configured with IPv6 addresses and prefixes<\/li>\n\n\n\n
                          8. System Events<\/strong>: IPv6-specific lease events are generated for WAN Manager processing<\/li>\n\n\n\n
                          9. WAN Manager Integration<\/strong>: WAN Manager handles IPv6 default routes, DNS, and system configuration<\/li>\n\n\n\n
                          10. Status Update<\/strong>: TR-181 data model is updated with IPv6 lease information<\/li>\n<\/ol>\n\n\n\n
                            Extension Points<\/p>\n\n\n\n
                            Plugin Architecture<\/strong><\/p>\n\n\n\n
                              \n
                            • Client Plugins<\/strong>: Extend support to new DHCP clients<\/li>\n\n\n\n
                            • Protocol Extensions<\/strong>: Add support for new DHCP options<\/li>\n\n\n\n
                            • Custom Handlers<\/strong>: Implement custom lease processing<\/li>\n\n\n\n
                            • Integration Hooks<\/strong>: Add hooks for external system integration<\/li>\n<\/ul>\n\n\n\n
                              Configuration Extensions<\/strong><\/p>\n\n\n\n
                                \n
                              • Custom Options<\/strong>: Support for vendor-specific options<\/li>\n\n\n\n
                              • Policy Engines<\/strong>: Pluggable policy decision engines<\/li>\n\n\n\n
                              • Validation Rules<\/strong>: Custom validation rule engines<\/li>\n\n\n\n
                              • Event Handlers<\/strong>: Custom event processing extensions<\/li>\n<\/ul>\n\n\n\n
                                This architectural documentation provides the foundation for understanding how the DHCP Client Manager components interact and can be extended or modified to meet specific deployment requirements.<\/p>\n","protected":false},"excerpt":{"rendered":"
                                Component Overview  The DHCP Client Manager architecture is designed around a modular, event-driven approach that […]<\/p>\n","protected":false},"author":659,"featured_media":0,"parent":12785,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"class_list":["post-12801","page","type-page","status-publish","hentry"],"yoast_head":"\nDHCP Client Manager Architecture - RDK Documentation Portal | Documentation<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/developer.rdkcentral.com\/documentation\/documentation\/rdk_broadband_documentation\/components\/dhcp-client-manager\/dhcp-client-manager-architecture\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DHCP Client Manager Architecture - 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