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