D-Link DGS-6600-48TS Configuration Guide - Page 488
DHCP server and DHCP relay agent global mode, High availability in DHCP server
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Volume 9-Network Application / Chapter 49-DHCP Server Configuration DHCP Server Configuration Commands DHCP server and DHCP relay agent global mode In this device, DHCP server and DHCP relay can be enabled at the same time(DHCP server can be enabled by command "service dhcp" and relay can be enabled by command "ip dhcp relay") but function mutual exclusively. The device decides which module takes responsibility for the ingress DHCP packet by following rules: • DHCP server and relay both enable: • Ingress interface is configured relay server address (by command "ip dhcp relay address"): • Action: Only DHCP relay agent functions for this packet. • Ingress interface is not configured relay server address: • Action: DHCP server handles this packet. Note: If DHCP relay is not enabled and DHCP server is enabled, then server handles packets even if ingress interface is configured relay server address. High availability in DHCP server DHCP server in the device will synchronize its lease information for clients with internal high availability mechanism every 600 seconds and only lease information which already completes the DHCP handshake will be synchronized. And in the device, the maximum number of entries that will be synchronised is 12288 in current design. DHCP Server Configuration Commands Below are some of the DHCP server functions that can be configured. For a full list of commands and options please refer to the CLI guide. • Enabling the DHCP Server • Configuring the DHCP Address Pool Name and Entering DHCP Pool configuration Mode • Configuring the DHCP IP Address Pool and Subnet Mask • Configuring the Domain Name for a DHCP Client. • Configuring the IP Domain Name System Servers for the Client • Configuring the NetBIOS Windows Internet Naming Service Servers for the Client • Configuring the NetBIOS Node Type for the client • Configuring the Default Router for the Client • Configuring the Lease Duration of an IP Address • Configuring the DHCP Bootfile • Configuring DHCP Ping Packets • Monitoring and Maintaining the DHCP Server Functions DGS-6600 Configuration Guide 488