1# 2# CDDL HEADER START 3# 4# The contents of this file are subject to the terms of the 5# Common Development and Distribution License (the "License"). 6# You may not use this file except in compliance with the License. 7# 8# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9# or http://www.opensolaris.org/os/licensing. 10# See the License for the specific language governing permissions 11# and limitations under the License. 12# 13# When distributing Covered Code, include this CDDL HEADER in each 14# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15# If applicable, add the following below this CDDL HEADER, with the 16# fields enclosed by brackets "[]" replaced with your own identifying 17# information: Portions Copyright [yyyy] [name of copyright owner] 18# 19# CDDL HEADER END 20# 21 22# 23# Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24# Use is subject to license terms. 25# Copyright (c) 2016-2017, Chris Fraire <cfraire@me.com>. 26# 27 28# 29# This file contains tunable parameters for dhcpagent(8). 30# 31 32# All parameters can be tuned for a specific interface by prepending 33# the interface name to the parameter name. For example, to make 34# VERIFIED_LEASE_ONLY happen on all interfaces except hme0, specify: 35# 36# hme0.VERIFIED_LEASE_ONLY=no 37# VERIFIED_LEASE_ONLY=yes 38# 39# An interface name alone specifies IPv4 DHCP. For DHCPv6, append ".v6". 40# Some examples: 41# 42# hme0.VERIFIED_LEASE_ONLY=no specify hme0 v4 behavior 43# hme0.v6.VERIFIED_LEASE_ONLY=no specify hme0 v6 behavior 44# VERIFIED_LEASE_ONLY=no match all v4 interfaces 45# .v6.VERIFIED_LEASE_ONLY=no match all v6 interfaces 46 47# By default, when the DHCP agent is sent a SIGTERM (typically when 48# the system is shut down), all managed addresses are dropped rather 49# than released. Dropping an address does not notify the DHCP server 50# that the address is no longer in use, leaving it possibly available 51# for subsequent use by the same client. If DHCP is later restarted 52# on the interface, the client will ask the server if it can continue 53# to use the address. If the server either grants the request, or 54# does not answer (and the lease has not yet expired), then the client 55# will use the original address. 56# 57# Similarly, when the system is suspended and then woken up or when 58# the link status transitions from down to up, DHCP will ask the server 59# to continue to use the managed address, in case the lease has changed. 60# 61# By uncommenting the following parameter-value pairs, all managed 62# addresses are released on SIGTERM instead, and any that may have been 63# saved but cannot be verified will not be used. When SIGTERM is 64# received, the DHCP server is notified that the address is available 65# for use, and the address will not be saved for a later restart. If 66# DHCP receives SIGTHAW or a link-up event, DHCP will attempt to verify 67# the previous lease, but if unable to do so, it will not attempt to 68# use that lease. This behavior is often preferred for roaming systems. 69# 70# VERIFIED_LEASE_ONLY=yes 71# .v6.VERIFIED_LEASE_ONLY=yes 72 73# By default, the DHCP agent waits 3 seconds to collect OFFER 74# responses to a DISCOVER. If it receives no OFFERs in this time, it 75# then waits for another 3 seconds, and so forth. To change this 76# behavior, set and uncomment the following parameter-value pair. 77# Note: this does not control the retransmission strategy for 78# DISCOVERs, which is formally specified in RFC 2131. This parameter 79# is specified in seconds. 80# 81# OFFER_WAIT= 82 83# By default, the DHCP agent does not send out a client identifier 84# (and hence, the chaddr field is used by the DHCP server as the 85# client identifier.) To make the DHCP agent send a client 86# identifier, set and uncomment the following parameter-value pair. 87# Note that by default this is treated as an NVT ASCII string. To 88# specify a binary value, prepend "0x" to a sequence of hexadecimal 89# digits (for example, the value 0xAABBCC11 would set the client 90# identifier to the 4-byte binary sequence 0xAA 0xBB 0xCC 0x11). 91# 92# CLIENT_ID= 93 94# By default, for an IPv4 interface that is not in an IP network 95# multipathing (IPMP) group, that is not IP over InfiniBand (IPoIB), and 96# that is not a logical interface, the DHCP agent will forgo sending a 97# client identifier unless CLIENT_ID is defined. 98# 99# To use a system-managed, RFC 3315-style (i.e., DHCPv6-style) binding 100# identifier as documented in RFC 4361, "Node-specific Client Identifiers 101# for DHCPv4," for all IPv4 interfaces (unless CLIENT_ID is defined), 102# uncomment the following line. 103# 104# V4_DEFAULT_IAID_DUID=yes 105 106# By default, the DHCP agent will try to request the Fully Qualified Domain 107# Name (FQDN) currently associated with the interface performing DHCP. The 108# hostname is defined by using the -h,--reqhost option of ipadm(8) or the 109# ncu ip-reqhost property of nwamcfg(8) or by flagging the interface as 110# primary so that nodename(5) is used as the hostname. 111# 112# A defined hostname will be used as the FQDN if it is "rooted" (i.e., if 113# it ends with a '.') or if it consists of at least three DNS labels (e.g., 114# srv.example.com). If the hostname is not an FQDN, then DNS_DOMAINNAME 115# will be appended if defined or ADOPT_DOMAINNAME discernment will be used 116# if active. If no FQDN can be determined, the option will not be used. 117# 118# If this REQUEST_FQDN option is enabled, an FQDN will be sent in messages 119# to the DHCP server along with RFC 4702 options to request that a 120# collaborating DNS server perform DNS updates for A and PTR resource 121# records. To prevent sending FQDN and DNS options, uncomment the line 122# below. 123# 124# If an FQDN is sent, REQUEST_HOSTNAME processing will not be done, per RFC 125# 4702 (3.1): "clients that send the Client FQDN option in their messages 126# MUST NOT also send the Host Name." 127# 128# REQUEST_FQDN=no 129 130# By default, the DHCP agent will not attempt to construct an FQDN from a 131# PQDN specified by the -h,--reqhost option of ipadm(8), by the ncu 132# ip-reqhost property of nwamcfg(8), or by nodename(5). Set and 133# uncomment the following parameter to indicate a domain name to be used by 134# the DHCP agent to construct if necessary an FQDN. 135# 136# DNS_DOMAINNAME= 137 138# By default, the DHCP agent will not attempt to use a domain name returned 139# by the DHCP server or the domain in resolv.conf(5) to construct an FQDN 140# from a PQDN specified by the -h,--reqhost option of ipadm(8), by the ncu 141# ip-reqhost property of nwamcfg(8), or by nodename(5). Set and uncomment 142# the following parameter to indicate that a returned DHCPv4 DNSdmain or the 143# domain from resolv.conf(5) should be adopted by the DHCP agent to 144# construct if necessary an FQDN. 145# 146# ADOPT_DOMAINNAME=yes 147 148# By default, the DHCP agent will try to request the hostname currently 149# associated with the interface performing DHCP. If this option is 150# enabled, the agent will attempt to use an -h,--reqhost option saved with 151# ipadm(8) or an ncu ip-reqhost property set with nwamcfg(8); or else 152# attempt to find a host name in /etc/hostname.<if>, which must contain a 153# line of the form 154# 155# inet name 156# 157# where "name" is a single RFC 1101-compliant token; or else use 158# nodename(5) for a DHCP interface flagged as primary. If found in any of 159# these configurations, the token will be used to request that host name 160# from the DHCP server. To prevent this, uncomment the following line. 161# 162# REQUEST_HOSTNAME=no 163 164# By default, a parameter request list requesting a subnet mask (1), 165# router (3), DNS server (6), hostname (12), DNS domain (15), broadcast 166# address (28), and encapsulated vendor options (43), is sent to the DHCP 167# server when the DHCP agent sends requests. However, if desired, this 168# can be changed by altering the following parameter-value pair. The 169# numbers correspond to the values defined in the IANA bootp-dhcp-parameters 170# registry at the time of this writing. Site and standard option names from 171# /etc/dhcp/inittab are also accepted. 172# 173PARAM_REQUEST_LIST=1,3,6,12,15,28,43 174 175# The default DHCPv6 parameter request list has preference (7), unicast (12), 176# DNS addresses (23), DNS search list (24), NIS addresses (27), and 177# NIS domain (29). This may be changed by altering the following parameter- 178# value pair. The numbers correspond to the values defined in the IANA 179# dhcpv6-parameters registry at the time of this writing. Site and standard 180# option names from /etc/dhcp/inittab6 are also accepted. 181.v6.PARAM_REQUEST_LIST=7,12,23,24,27,29 182 183# The parameter ignore list allows you to instruct the DHCP client to discard 184# optional parameters received from the DHCP server. The format is the same 185# as the request list above. When discarded, a parameter will not be acted 186# on by the DHCP client or returned to users via the dhcpinfo(1) command. 187PARAM_IGNORE_LIST= 188.v6.PARAM_IGNORE_LIST= 189