# # CDDL HEADER START # # The contents of this file are subject to the terms of the # Common Development and Distribution License (the "License"). # You may not use this file except in compliance with the License. # # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE # or http://www.opensolaris.org/os/licensing. # See the License for the specific language governing permissions # and limitations under the License. # # When distributing Covered Code, include this CDDL HEADER in each # file and include the License file at usr/src/OPENSOLARIS.LICENSE. # If applicable, add the following below this CDDL HEADER, with the # fields enclosed by brackets "[]" replaced with your own identifying # information: Portions Copyright [yyyy] [name of copyright owner] # # CDDL HEADER END # # # Copyright 2009 Sun Microsystems, Inc. All rights reserved. # Use is subject to license terms. # Copyright (c) 2016-2017, Chris Fraire . # # # This file contains tunable parameters for dhcpagent(8). # # All parameters can be tuned for a specific interface by prepending # the interface name to the parameter name. For example, to make # VERIFIED_LEASE_ONLY happen on all interfaces except hme0, specify: # # hme0.VERIFIED_LEASE_ONLY=no # VERIFIED_LEASE_ONLY=yes # # An interface name alone specifies IPv4 DHCP. For DHCPv6, append ".v6". # Some examples: # # hme0.VERIFIED_LEASE_ONLY=no specify hme0 v4 behavior # hme0.v6.VERIFIED_LEASE_ONLY=no specify hme0 v6 behavior # VERIFIED_LEASE_ONLY=no match all v4 interfaces # .v6.VERIFIED_LEASE_ONLY=no match all v6 interfaces # By default, when the DHCP agent is sent a SIGTERM (typically when # the system is shut down), all managed addresses are dropped rather # than released. Dropping an address does not notify the DHCP server # that the address is no longer in use, leaving it possibly available # for subsequent use by the same client. If DHCP is later restarted # on the interface, the client will ask the server if it can continue # to use the address. If the server either grants the request, or # does not answer (and the lease has not yet expired), then the client # will use the original address. # # Similarly, when the system is suspended and then woken up or when # the link status transitions from down to up, DHCP will ask the server # to continue to use the managed address, in case the lease has changed. # # By uncommenting the following parameter-value pairs, all managed # addresses are released on SIGTERM instead, and any that may have been # saved but cannot be verified will not be used. When SIGTERM is # received, the DHCP server is notified that the address is available # for use, and the address will not be saved for a later restart. If # DHCP receives SIGTHAW or a link-up event, DHCP will attempt to verify # the previous lease, but if unable to do so, it will not attempt to # use that lease. This behavior is often preferred for roaming systems. # # VERIFIED_LEASE_ONLY=yes # .v6.VERIFIED_LEASE_ONLY=yes # By default, the DHCP agent waits 3 seconds to collect OFFER # responses to a DISCOVER. If it receives no OFFERs in this time, it # then waits for another 3 seconds, and so forth. To change this # behavior, set and uncomment the following parameter-value pair. # Note: this does not control the retransmission strategy for # DISCOVERs, which is formally specified in RFC 2131. This parameter # is specified in seconds. # # OFFER_WAIT= # By default, the DHCP agent does not send out a client identifier # (and hence, the chaddr field is used by the DHCP server as the # client identifier.) To make the DHCP agent send a client # identifier, set and uncomment the following parameter-value pair. # Note that by default this is treated as an NVT ASCII string. To # specify a binary value, prepend "0x" to a sequence of hexadecimal # digits (for example, the value 0xAABBCC11 would set the client # identifier to the 4-byte binary sequence 0xAA 0xBB 0xCC 0x11). # # CLIENT_ID= # By default, for an IPv4 interface that is not in an IP network # multipathing (IPMP) group, that is not IP over InfiniBand (IPoIB), and # that is not a logical interface, the DHCP agent will forgo sending a # client identifier unless CLIENT_ID is defined. # # To use a system-managed, RFC 3315-style (i.e., DHCPv6-style) binding # identifier as documented in RFC 4361, "Node-specific Client Identifiers # for DHCPv4," for all IPv4 interfaces (unless CLIENT_ID is defined), # uncomment the following line. # # V4_DEFAULT_IAID_DUID=yes # By default, the DHCP agent will try to request the Fully Qualified Domain # Name (FQDN) currently associated with the interface performing DHCP. The # hostname is defined by using the -h,--reqhost option of ipadm(8) or the # ncu ip-reqhost property of nwamcfg(8) or by flagging the interface as # primary so that nodename(5) is used as the hostname. # # A defined hostname will be used as the FQDN if it is "rooted" (i.e., if # it ends with a '.') or if it consists of at least three DNS labels (e.g., # srv.example.com). If the hostname is not an FQDN, then DNS_DOMAINNAME # will be appended if defined or ADOPT_DOMAINNAME discernment will be used # if active. If no FQDN can be determined, the option will not be used. # # If this REQUEST_FQDN option is enabled, an FQDN will be sent in messages # to the DHCP server along with RFC 4702 options to request that a # collaborating DNS server perform DNS updates for A and PTR resource # records. To prevent sending FQDN and DNS options, uncomment the line # below. # # If an FQDN is sent, REQUEST_HOSTNAME processing will not be done, per RFC # 4702 (3.1): "clients that send the Client FQDN option in their messages # MUST NOT also send the Host Name." # # REQUEST_FQDN=no # By default, the DHCP agent will not attempt to construct an FQDN from a # PQDN specified by the -h,--reqhost option of ipadm(8), by the ncu # ip-reqhost property of nwamcfg(8), or by nodename(5). Set and # uncomment the following parameter to indicate a domain name to be used by # the DHCP agent to construct if necessary an FQDN. # # DNS_DOMAINNAME= # By default, the DHCP agent will not attempt to use a domain name returned # by the DHCP server or the domain in resolv.conf(5) to construct an FQDN # from a PQDN specified by the -h,--reqhost option of ipadm(8), by the ncu # ip-reqhost property of nwamcfg(8), or by nodename(5). Set and uncomment # the following parameter to indicate that a returned DHCPv4 DNSdmain or the # domain from resolv.conf(5) should be adopted by the DHCP agent to # construct if necessary an FQDN. # # ADOPT_DOMAINNAME=yes # By default, the DHCP agent will try to request the hostname currently # associated with the interface performing DHCP. If this option is # enabled, the agent will attempt to use an -h,--reqhost option saved with # ipadm(8) or an ncu ip-reqhost property set with nwamcfg(8); or else # attempt to find a host name in /etc/hostname., which must contain a # line of the form # # inet name # # where "name" is a single RFC 1101-compliant token; or else use # nodename(5) for a DHCP interface flagged as primary. If found in any of # these configurations, the token will be used to request that host name # from the DHCP server. To prevent this, uncomment the following line. # # REQUEST_HOSTNAME=no # By default, a parameter request list requesting a subnet mask (1), # router (3), DNS server (6), hostname (12), DNS domain (15), root path (17), # broadcast address (28), and encapsulated vendor options (43), is sent to the # DHCP server when the DHCP agent sends requests. However, if desired, this # can be changed by altering the following parameter-value pair. The # numbers correspond to the values defined in the IANA bootp-dhcp-parameters # registry at the time of this writing. Site and standard option names from # /etc/dhcp/inittab are also accepted. # PARAM_REQUEST_LIST=1,3,6,12,15,17,28,43 # The default DHCPv6 parameter request list has preference (7), unicast (12), # DNS addresses (23), DNS search list (24), NIS addresses (27), and # NIS domain (29). This may be changed by altering the following parameter- # value pair. The numbers correspond to the values defined in the IANA # dhcpv6-parameters registry at the time of this writing. Site and standard # option names from /etc/dhcp/inittab6 are also accepted. .v6.PARAM_REQUEST_LIST=7,12,23,24,27,29 # The parameter ignore list allows you to instruct the DHCP client to discard # optional parameters received from the DHCP server. The format is the same # as the request list above. When discarded, a parameter will not be acted # on by the DHCP client or returned to users via the dhcpinfo(1) command. PARAM_IGNORE_LIST= .v6.PARAM_IGNORE_LIST=