dhcpinfo [-c] [-i interface] [-n limit] [-v 4|6] code
dhcpinfo [-c] [-i interface] [-n limit] [-v 4|6] identifier
See dhcp_inittab(4) for the list of mnemonic identifier codes for all DHCP parameters. See RFC 2132, DHCP Options and BOOTP Vendor Extensions for more details on DHCPv4 parameters, and RFC 3315, Dynamic Host Configuration Protocol for IPv6 (DHCPv6), for more details on DHCPv6 parameters.
The format of each individual value is determined by the data type of the option, as determined by dhcp_inittab(4). The possible data types and their formats are listed below:
|Data Type||Format||dhcp_inittab(4) type|
|Unsigned Number||One or more decimal digits||UNUMBER8, UNUMBER16, UNUMBER32, UNUMBER64|
|Signed Number||One or more decimal digits, optionally preceded by a minus sign||SNUMBER8, SNUMBER16, SNUMBER32, SNUMBER64|
|IP Address||Dotted-decimal notation||IP|
|IPv6 Address||Colon-separated notation||IPv6|
|Octet||The string 0x followed by a two-digit hexadecimal value||OCTET|
|String||Zero or more ASCII characters||ASCII|
|DUID||DHCP Unique Identifier text||DUID|
|Domain Name||Standard dot-separated domain name, RFC 1035 format||DOMAIN|
If a primary interface has not been selected for the system by ifconfig(1M) or for this command by -i, the system automatically selects an interface to consider as primary for the current command invocation. The selection chooses the interface whose name sorts lexically first, and that has DHCP parameters attached. This selection does not affect system state. Use ifconfig(1M) to set a primary interface.
The recommended practice in the dhcpagent(1M) eventhook scripts is to specify the desired interface with -i, rather than relying on primary selection.
For DHCPv6, the interface name used should be the name of the physical interface, not one of the logical interfaces created by dhcpagent.
|ATTRIBUTE TYPE||ATTRIBUTE VALUE|
Alexander, S., and R. Droms, RFC 2132, DHCP Options and BOOTP Vendor Extensions, Silicon Graphics, Inc., Bucknell University, March 1997.
Droms, R. , RFC 3315, Dynamic Host Configuration Protocol for IPv6 (DHCPv6), Cisco Systems, July 2003.
Mockapetris, P.V. , RFC 1035, Domain names - implementation and specification, ISI, November 1987.
|February 13, 2020|