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To configure DHCP serverCommand | Purpose | Device(config)# service dhcp | Enables the DHCP server and relay agent on your switch. | Device(config)# ip dhcp excluded-address low-address [high-address] | Specifies IP addresses that the DHCP server should not assign to DHCP clients. | Device(config)# ip dhcp pool 1 | Creates a name for the DHCP server address pool and enters DHCP pool configuration mode. | Device(dhcp-config)# network 172.20.0.0 /24 | Specifies the subnet network number and mask of the DHCP address pool. | Device(dhcp-config)# dns server 8.8.4.4 8.8.8.8 | Specifies the IP address of a DNS server that is available to a DHCP client. | Device(dhcp-config)# default-router 172.16.20.0.1 | Specifies the IP address of the default device for a DHCP client. |
To display DHCP server informationCommand | Purpose | Device> show ip dhcp binding [address] | Displays a list of all bindings created on a specific DHCP server. | Device> show ip dhcp conflict [address] | Displays a list of all address conflicts recorded by a specific DHCP server. | Device> show ip dhcp server statistics | Displays count information about server statistics and messages sent and received. |
To clear DHCP server variables:Command | Purpose | Device# clear ip dhcp binding address | * | Deletes an automatic address binding from the DHCP database. Specifying address clears the automatic binding for a specific (client) IP address whereas specifying asterisk (*) clears all automatic bindings. | Device# clear ip dhcp conflict address | * | Clears an address conflict from the DHCP database. Specifying address clears the conflict for a specific IP address whereas specifying an asterisk (*) clears conflicts for all addresses. | Device# clear ip dhcp server statistics | Resets all DHCP server counters to 0. |
To enable DHCP server debuggingCommand | Purpose | Device# debug ip dhcp server {events | packets} | Enables debugging on the DHCP server. |
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