Port 547
DHCPv6 Server
Port 547 is utilized by the Dynamic Host Configuration Protocol version 6 (DHCPv6) server to allocate IPv6 addresses and configuration data dynamically to clients within an IPv6 network environment. It facilitates automatic network configuration, enabling devices to communicate seamlessly without manual IP address assignments..
Technical Details
Port 547 is reserved for DHCPv6 servers, as defined in RFC 3315, facilitating dynamic configuration of IPv6 addresses and network parameters to client devices. The protocol streamlines transitions from manual IPv6 configuration by automating address assignment, default gateway provisioning, DNS server configuration, and other critical settings necessary for IPv6 communication.
Typically, DHCPv6 servers listen on port 547 while clients initiate requests from port 546. DHCPv6 utilizes a client-server message exchange model involving messages such as SOLICIT, ADVERTISE, REQUEST, and REPLY. Communication can occur over either UDP or TCP, although UDP is more commonly used for initial discovery and allocation, with TCP sometimes used for longer or more complex exchanges or relaying.
DHCPv6 supports both Stateless Address Autoconfiguration (SLAAC) integration and Stateful address assignments, allowing flexibility based on the network's addressing schemes. It also supports relay agents to extend service reach across large, segmented networks, making it a critical service for enterprise IPv6 deployments.