2-5To improve security and avoid malicious attacks to unused sockets, S5600 Ethernet switches providethe following functions:z UDP port 67 and UDP port 68 ports used by DHCP are enabled only when DHCP is enabled.z UDP port 67 and UDP port 68 ports are disabled when DHCP is disabled.The corresponding implementation is as follows:z After DHCP is enabled with the dhcp enable command, if the DHCP server and DHCP relay agentfunctions are not configured, UDP port 67 and UDP port 68 ports are kept disabled; if the DHCPserver or DHCP relay agent function is configured, UDP port 67 and UDP port 68 ports areenabled.z After DHCP is disabled with the undo dhcp enable command, even if the DHCP server or DHCPrelay function is configured, UDP port 67 and UDP port 68 ports will be disabled.Configuring the Global Address Pool Based DHCP ServerConfiguration Task ListComplete the following tasks to configure the global address pool based DHCP server:Task RemarksEnabling the Global Address Pool Mode on Interface(s) RequiredCreating a DHCP Global Address Pool RequiredConfiguring the static IP address allocationmodeConfiguring anAddress AllocationMode for the GlobalAddress Pool Configuring the dynamic IP address allocationmodeOne of the two options isrequiredOnly one mode can beselected for the sameglobal address pool.Configuring a Domain Name Suffix for the DHCP Client OptionalConfiguring DNS Servers for the DHCP Client OptionalConfiguring WINS Servers for the DHCP Client OptionalConfiguring Gateways for the DHCP Client OptionalConfiguring BIMS Server Information for the DHCP Client OptionalConfiguring Option 184 Parameters for the Client with Voice Service OptionalConfiguring the TFTP Server and Bootfile Name for the DHCP Client OptionalConfiguring a Self-Defined DHCP Option OptionalEnabling the Global Address Pool Mode on Interface(s)You can configure the global address pool mode on the specified or all interfaces of a DHCP server.After that, when the DHCP server receives DHCP packets from DHCP clients through these interfaces,it assigns IP addresses in the global address pool to the DHCP clients.
