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2-80 Command Line Interface Commands Reference
ip dhcp gen-option tag data { data_of_the_correct_format_given_data-type }
This command allows you to specify the gen-option data.
■ If the data-type is ascii, then any printable character
■ If the data-type is hex, then an even number of hex characters (e.g. “0123456789AbcdEf”
■ If the data-type is dotted-decimal, then a series of numbers between 0 and 255, separated by a period (.).
IP addresses are generally represented in this form.
ip dhcp gen-option tag priority { low | high }
show ip dhcp gen-option tag priority { low | high }
no ip dhcp gen-option tag
These commands allow you to set, display, or disable whether the default handling behavior for a particular
option should be overridden by the specified gen-option. For most options this is irrelevant, but at least the
following options are handled in the router outside the context of gen-options:
Note: In most cases overriding the CPE default behavior is not recommended. Also, if the CPE can, but does
not, serve an option in the above list, corresponding low-priority gen-options will be used to serve it.
OPTION_SUBNETMASK 1
OPTION_ROUTER 3
OPTION_DNSSERVER 6
OPTION_DOMAINNAME 15
OPTION_BCASTADDR 28
OPTION_ETHERNETENCAP 36
OPTION_NTPSERVERS 42
OPTION_NBNSNAMESERVERS 44
OPTION_NBTCPNODETYPE 46
OPTION_NBTCPSCOPE 47
OPTION_LEASETIME 51
OPTION_RENEWALTIME 58
OPTION_REBINDINGTIME 59
OPTION_VID_VENDOR_SPECIFIC (vendor identity) 125
OPTION_TFTP_SERVER_ADDR 150