Efficient Networks 5600 Series manual Dhcp Relay, Dhcp Server, Domain Name Service DNS

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DHCP Relay

The router can be configured to operate as a DHCP relay agent. This allows local machines on the LAN to acquire their IP addresses via DHCP requests and replies that are forwarded through the router to/from a DHCP server on the WAN. In this case, the DHCP requests are forwarded to a specific DHCP server on the WAN network and the DHCP reply is forwarded back to the LAN network.

The DHCP relay agent can be configured with a Primary and a Secondary DHCP Server IP address. The Secondary address is only used if the Primary is unreachable. Any DHCP requests that are received by the router are relayed to the Primary DHCP server at the specified IP address. This DHCP server is then responsible for assigning the DHCP information to the DHCP client. Typically, this DHCP server will exist in the WAN space.

DHCP Server

When operating as a DHCP server, the router will dynamically assign IP addresses to LAN nodes. The DHCP server verifies a device’s identity, leases it an IP address for a predetermined period of time, and reclaims the address for reassignment at the end of the lease period. The DHCP server supports DHCP client hosts on the LAN side only. The router will ignore all DHCP requests which arrive from the WAN interface.

NOTE: The router has an option to set the Ethernet IP address on the router and not reboot. When configuring the DHCP server to hand out a range of addresses on a new subnet and changing the Ethernet IP address of the router, you must reboot the router. Otherwise, the DHCP server and the Ethernet IP address currently being used by the router will be out of sync. In this situation, the router will issue error messages to the console and the DHCP server will not be able to properly give out addresses. Always reboot the router when changing the Ethernet IP address; verify that the DHCP server is configured to give out addresses for the correct IP subnet of the Ethernet interface.

Domain Name Service (DNS)

The router supports Domain Name Service (DNS) which provides hostname-to-IP address resolution for LAN-side clients. There are two

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Contents 6SHHG6WUHDP Efficient Networks, Inc Efficient Networks, Inc. Hardware Warranty Efficient Networks, Inc Contents Efficient Networks, Inc Efficient Networks, Inc Introduction About the 5600 Series DSL RouterRouting vs. Bridging Dslam Where and Why to Use RouterFor Information On See How to Use this GuideAbout the 5600 Series DSL Router Hardware Installation Installation RequirementsPackage Contents DSL Installation InstructionsRJ45 Connector Information RJ11 Connector InformationRouter LEDs on Startup Sys Enet Dsl Atm Network Access Accessing the RouterConnecting to the router via Ethernet Getting StartedTelnet Access Http Web-browser AccessFTP Access for Firmware/Configuration Uploads Local Terminal using Serial Connection Logging on via the Serial Port Types of User InterfacesHtml Web Interface Command Line InterfaceCommand Line Interface Conventions Command Prompt/Error PromptTypes of User Interfaces How do you want to use the Router? Configuring RouterSetting the Password PPP Factory Default ConfigurationRFC 1483 Configuration Router PPP ConfigurationBridge Configuration Testing the Configuration Terminology Concepts Acronyms Technical Concepts Asynchronous Transfer ModeDigital Subscriber Line DSL Encapsulation Methods PPP RFCPoint-to-Point Protocol PPP Dynamic Host Configuration Protocol DhcpDomain Name Service DNS Dhcp RelayDhcp Server DNS Resolver DNS ServerPublic and Private Networks and the use of Napt Technical Concepts Technical Reference DSL Router/Bridge Specifications36 5621 DSL Router/Bridge Specifications Numerics IndexRIP
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