Troubleshooting DHCP Relay Agent 621# Enable DHCP.[SW7750] dhcp enable# Create DHCP server group 1 and configure an IP address of 202.38.1.2 for it.[SW7750] dhcp-server 1 ip 202.38.1.2# Map VLAN-interface 2 to DHCP server group 1.[SW7750] interface Vlan-interface 2[SW7750-Vlan-interface2] dhcp-server 1# Configure an IP address for VLAN-interface 2, so that this interface is on thesame network segment with the DHCP clients.[SW7750-Vlan-interface2] ip address 10.110.1.1 255.255.0.0n You need to perform corresponding configurations on the DHCP server to enablethe DHCP clients to obtain IP addresses from the DHCP server. The DHCP serverconfigurations vary with different DHCP server devices, so the configurations areomitted.Troubleshooting DHCPRelay AgentSymptomA client fails to obtain configuration information through a DHCP relay agent.AnalysisThis problem may be caused by improper DHCP relay agent configuration. When aDHCP relay agent operates improperly, you can locate the problem by enablingdebugging and checking the information about debugging and interface state(You can display the information by executing the corresponding displaycommand).Solutionâ– Check if DHCP is enabled on the DHCP server and the DHCP relay agent.â– Check if an address pool that is on the same network segment with the DHCPclients is configured on the DHCP server.â– Check if a reachable route is configured between the DHCP relay agent and theDHCP server.â– Check the DHCP relay agent-enabled network devices. Check if the correctDHCP server group is configured on the interface connecting the networksegment where the DHCP client resides. Check if the IP address of the DHCPserver group is correct.
