Operation Manual – DHCPH3C S5600 Series Ethernet Switches Chapter 2 DHCP Server Configuration2-40[Sysname] radius scheme 123[Sysname-radius-123] primary authentication 10.1.2.2[Sysname-radius-123] primary accounting 10.1.2.2[Sysname] domain 123[Sysname-isp-123] scheme radius-scheme 123[Sysname-isp-123] quit# Create an address pool on the DHCP server.[Sysname] dhcp server ip-pool test[Sysname-dhcp-pool-test] network 10.1.1.0 mask 255.255.255.0# Enable DHCP accounting.[Sysname-dhcp-pool-test] accounting domain 1232.11 Troubleshooting a DHCP ServerI. SymptomThe IP address dynamically assigned by a DHCP server to a client conflicts with the IPaddress of another host.II. AnalysisWith DHCP enabled, IP address conflicts are usually caused by IP addresses that aremanually configured on hosts.III. Solutionz Disconnect the DHCP client from the network and then check whether there is ahost using the conflicting IP address by performing ping operation on another hoston the network, with the conflicting IP address as the destination and an enoughtimeout time.z The IP address is manually configured on a host if you receive a response packetof the ping operation. You can then disable the IP address from being dynamicallyassigned by using the dhcp server forbidden-ip command on the DHCP server.z Attach the DHCP client to the network, release the dynamically assigned IPaddress and obtain an IP address again. For example, enter DOS by executingthe cmd command in Windows XP, and then release the IP address by executingthe ipconfig/release command. Then obtain an IP address again by executingthe ipconfig/renew command.
