DHCP options

Option Description Command
Option 12
Name of the client ip dhcp client hostname host-name
Option 51
Request lease time ip dhcp client lease days [hours] [minutes]
Option 55
Turn off some of the requested options [no] ip dhcp client request option-name
Option 60
Vendor class identifier string ip dhcp client class-id { ascii string | hex string }
Option 61
Specify unique client identifier ip dhcp client client-id { interface-name| ascii string | hex string }

DHCP Client Identifier = hardware type (usually 01) + client hardware address.

Client Identifier NOT used for BOOTP. Solely for DHCP.

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