3Com Router 3000 Ethernet FamilyConfiguration Guide Chapter 9 DHCP Configuration3Com Corporation9-159.4 DHCP Common ConfigurationDHCP common configurations refer to those configurations suitable for both DHCPserver and DHCP relay. The configuration tasks includez Enable/disable DHCP servicesz Configure pseudo-DHCP server detection9.4.1 Enabling/Disabling DHCPFor both DHCP server and DHCP relay, DHCP configurations can take effect only afterDHCP is enabled.Perform the following configurations in the system view.Table 9-1 Enable/disable DHCPOperation CommandEnable DHCP. dhcp enableDisable DHCP. undo dhcp enableBy default, DHCP is enabled.Note:DHCP can operate normally only after you correctly set the system clock.9.4.2 Configuring Pseudo-DHCP Server DetectionPseudo-DHCP servers are unauthorized DHCP servers. Upon the request for IPaddress from a DHCP client, a pseudo-DHCP server might communicate with the clientand may allocate incorrect IP address to the client.You can configure pseudo-DHCP server detection to record IP address and interfaceinformation of DHCP server. Then the administrator can easily find and deal with thepseudo-DHCP server.Perform the following configurations in system view.Table 9-2 Configure pseudo-DHCP server detectionOperation CommandEnable pseudo-DHCP server detection. dhcp server detectDisable pseudo-DHCP server detection. undo dhcp server detect
