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System Administration Commands dhcpconfig(1M)
NAME
dhcpconfig - DHCP service configuration utility
SYNOPSIS
dhcpconfig -D -r resource -p path [-u uninterpreted] [-
l lease_length] [-n ] [-d DNS_domain] [-
a DNS_server_addresses] [-h hosts_resource] [-
y hosts_domain]
dhcpconfig -R server_addresses
dhcpconfig -U [-f] [-x] [-h]
dhcpconfig -N network_address [-m subnet_mask] [-b ] [-
t router_addresses] [-y NIS-domain] [-
a NIS_server_addresses] [-g]
dhcpconfig -C -r resource -p path [-f] [-k] [-
u uninterpreted]
dhcpconfig -X filename [-m macro_list] [-o option_list] [-
a network_addresses] [-f] [-x] [-g]
dhcpconfig -I filename [-f] [-g]
dhcpconfig -P [parameter[=value],...]
dhcpconfig -S [-f] [-e | -d | -r | -q]
DESCRIPTION
The dhcpconfig command is used to configure and manage the
Dynamic Host Configuration Protocol (DHCP) service or BOOTP
relay services. It is intended for use by experienced
Solaris system administrators and is designed for ease of
use in scripts. The dhcpmgr utility is recommended for less
experienced administrators or those preferring a graphical
utility to configure and manage the DHCP service or BOOTP
relay service.
The dhcpconfig command can be run by root, or by other users
assigned to the DHCP Management profile. See rbac(5) and
user_attr(4).
dhcpconfig requires one of the following function flags: -D,
-R, -U, -N, -C, -X, -I, -P or -S.
The dhcpconfig menu driven mode is supported in Solaris 8
and previous versions of Solaris.
Where dhcpconfig Obtains Configuration Information
dhcpconfig scans various configuration files on your Solaris
machine for information it can use to assign values to
options contained in macros it adds to the dhcptab confi-
guration table. The following table lists information
dhcpconfig needs, the source used, and how the information
is used:
__________________________________________________________________________
| Information | Source | Where Used |
| Timezone | System date, timezone settings | Locale macro |
| DNS parameters| nsswitch.conf, /etc/resolv.conf| Server macro |
| NIS parameters| System domainname,| Network macros |
| | nsswitch.conf, NIS | |
| Subnetmask | Network interface, netmasks| Network macros |
| | table in nameservice | |
|_______________|_________________________________|_______________________|
If you have not set these parameters on your server machine,
you should do so before configuring the DHCP server with
dhcpconfig. Note that if you specify options with the
dhcpconfig -D command line, the values you supply override
the values obtained from the system files.
OPTIONS
The following options are supported:
-C Convert to using a new data store,
recreating the DHCP data tables in a
format appropriate to the new data
store, and setting up the DHCP
server to use the new data store.
The following sub-options are
required:
-p path_to_data
The paths for SUNWfiles and
SUNWbinfiles must be absolute
UNIX pathnames. The path for
SUNWnisplus must be a fully
specified NIS+ directory
(including the tailing period.)
See dhcp_modules(5).
-r data_resource
New data store resource. One of
the following must be specified:
SUNWfiles, SUNWbinfiles, or
SUNWnisplus. See
dhcp_modules(5).
The following sub-options are
optional:
-f
Do not prompt for confirmation.
If -f is not used, a warning and
confirmation prompt are issued
before the conversion starts.
-k
Keep the old DHCP data tables
after successful conversion. If
any problem occurs during
conversion, tables are not
deleted even if -k sub-option is
not specified.
-u uninterpreted
Data which is ignored by
dhcpconfig, but passed on to the
datastore for interpretation.
The private layer provides for
module-specific configuration
information through the use of
the RESOURCE_CONFIG keyword.
Uninterpreted data is stored
within RESOURCE_CONFIG keyword
of dhcpsvc.conf(4). The -u sub-
option is not used with the
SUNWfiles, SUNWbinfiles, and
SUNWnisplus data stores. See
dhcp_modules(5).
-D Configure the DHCP service.
The following sub-options are
required:
-r data_resource
One of the following must be
specified: SUNWfiles, SUNWbin-
files, or SUNWnisplus. Other
data stores may be available.See
dhcp_modules(5).
-p path
The paths for SUNWfiles and
SUNWbinfiles must be absolute
UNIX pathnames. The path for
SUNWnisplus must be a fully
specified NIS+ directory
(including the tailing period.)
. See dhcp_modules(5).
The following sub-options are
optional:
-a DNS_servers
IP addresses of DNS servers,
separated with commas.
-d DNS_domain
DNS domain name.
-h hosts_resource
Resource in which to place hosts
data. Usually, the name service
in use on the server. Valid
values are nisplus, files, or
dns.
-l seconds
Lease length used for addresses
not having a specified lease
length, in seconds.
-n
Non-negotiable leases
-y hosts_domain
DNS or NIS+ domain name to be
used for hosts data. Valid only
if dns or nisplus is specified
for -h sub-option.
-u uninterpreted
Data which is ignored by
dhcpconfig, but passed on to the
datastore for interpretation.
The private layer provides for
module-specific configuration
information through the use of
the RESOURCE_CONFIG keyword.
Uninterpreted data is stored
within RESOURCE_CONFIG keyword
of dhcpsvc.conf(4). The -u sub-
option is not used with the
SUNWfiles, SUNWbinfiles, and
SUNWnisplus data stores. See
dhcp_modules(5).
-I filename Import data from filename, contain-
ing data previously exported from a
Solaris DHCP server. Note that after
importing, you may have to edit mac-
ros to specify the correct domain
names, and edit network tables to
change the owning server of
addresses in imported networks. Use
dhtadm and pntadm to do this.
The following sub-options are sup-
ported:
-f
Replace any conflicting data
with the data being imported.
-g
Signal the daemon to reload the
dhcptab once the import has been
completed.
-N net_address Configure an additional network for
DHCP service.
The following sub-options are sup-
ported:
-a NIS_server_addresses
List of IP addresses of NIS
servers.
-b
Network is a point-to-point
(PPP) network, therefore no
broadcast address should be con-
figured. If -b is not used, the
network is assumed to be a LAN,
and the broadcast address is
determined using the network
address and subnet mask.
-g
Signal the daemon to reload the
dhcptab.
-m xxx.xxx.xxx.xxx
Subnet mask for the network; if
-m is not used, subnet mask is
obtained from netmasks.
-t router_addresses
List of router IP addresses; if
not specified, router discovery
flag is set.
-y NIS_domain_name
If NIS is used on this network,
specify the NIS domain name.
-P Configure the DHCP service parame-
ters. Each parameter and value are
specified by the following pattern:
parameter[=value],...
Where parameter and value are:
parameter
One of the DHCP service parame-
ters listed in dhcpsvc.conf(4).
If the corresponding value is
not specified, the current
parameter value is displayed. If
parameter is not specified, all
parameters and current values
are displayed.
value
Optional string to set the
servers parameter to if the
value is acceptable. If the
value is missing or is empty
(""), the parameter and its
current value are deleted.
After a parameter has changed the
DHCP server requires re-starting
before you can use new parameter
values.
-R server_addresses Configure the BOOTP relay service.
BOOTP or DHCP requests are forwarded
to the list of servers specified.
server_addresses is a comma
separated list of hostnames and/or
IP addresses.
-S Control the DHCP service.
The following sub-options are sup-
ported:
-d
Disable and stop the DHCP ser-
vice.
-e
Enable and start the DHCP ser-
vice.
-q
Display the state of the DHCP
service. The state is encoded
into the exit status.
0 DHCP service disabled and stopped
1 DHCP service enabled and stopped
2 DHCP service disabled and running
3 DHCP service enabled and running
-r
Enable and restart the DHCP ser-
vice.
-U Unconfigure the DHCP service or
BOOTP relay service.
The following sub-options are sup-
ported:
-f
Do not prompt for confirmation.
If -f is not used, a warning and
confirmation prompt is issued.
-h
Delete hosts entries from name
service.
-x
Delete the dhcptab and network
tables.
-X filename Export data from the DHCP data
tables, saving to filename, to move
the data to another Solaris DHCP
server.
The following sub-options are
optional:
-a networks_to_export
List of networks whose addresses
should be exported, or the key-
word ALL to specify all net-
works. If -a is not specified,
no networks are exported.
-g
Signal the daemon to reload the
dhcptab after the export has
been completed.
-m macros_to_export
List of macros to export, or the
keyword ALL to specify all mac-
ros. If -m is not specified, no
macros are exported.
-o options_to_export
List of options to export, or
the keyword ALL to specify all
options. If -o is not specified,
no options are exported.
-x
Delete the data from this server
after it is exported. If -x is
not specified you are in effect
copying the data.
EXAMPLES
Example 1: Configuring DHCP Service with Binary Files Data
Store
The following command configures DHCP service, using the
binary files data store, in the DNS domain acme.eng, with a
lease time of 28800 seconds (8 hours),
example# dhcpconfig -D -r SUNWbinfiles -p /var/dhcp -l 28800 -d acme.eng
-a 120.30.33.4 -h dns -y acme.eng
Example 2: Configuring BOOTP Relay Agent
The following command configures the DHCP daemon as a BOOTP
relay agent, which forwards BOOTP and DHCP requests to the
servers having the IP addresses 120.30.33.7 and
120.30.42.132:
example# dhcpconfig -R 120.30.33.7,120.30.42.132
Example 3: Unconfiguring DHCP Service
The following command unconfigures the DHCP service, with
confirmation, and deletes the DHCP data tables and host
table entries:
example# dhcpconfig -U -x -h
Example 4: Configuring a Network for DHCP Service
The following command configures an additional LAN network
for DHCP service, specifying that clients should use router
discovery and providing the NIS domain name and NIS server
address:
example# dhcpconfig -N 120.30.171.0 -y east.acme.eng.com -a 120.30.33.4
Example 5: Converting to SUNWnisplus Data Store
The following command converts a DHCP server from using a
text or binary files data store to a NIS+ data store, delet-
ing the old data store's DHCP tables:
example# dhcpconfig -C -r SUNWnisplus -p whatever.com.
Example 6: Exporting a Network, Macros, and Options from a
DHCP Server
The following command exports one network (120.30.171.0) and
its addresses, the macro 120.30.171.0, and the options motd
and PSptrfrom a DHCP server, saves the exported data in file
/export/var/120301710_data, and deletes the exported data
from the server.
example# dhcpconfig -X /var/dhcp/120301710_export
-a 120.30.171.0 -m 120.30.171.0 -o motd,PSptr
Example 7: Importing Data on a DHCP Server
The following command imports DHCP data from a file,
/net/golduck/export/var/120301710_data, containing data pre-
viously exported from a Solaris DHCP server, overwrites any
conflicting data on the importing server, and signals the
daemon to reload the dhcptab once the import is completed:
example# dhcpconfig -I /net/golduck/export/var/120301710_data -f -g
Example 8: Setting DHCP Server Parameters
The following command sets the number of minutes that the
DHCP server waits before timing out when updating DNS infor-
mation on DHCP clients to five minutes.
example# example# dhcpconfig -P UPDATE_TIMEOUT=5
Example 9: Re-starting the DHCP server
The following command stops and re-starts the DHCP server.
example# example# dhcpconfig -S -r
DHCP server stopped
DHCP server started
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWdhcsu |
|_____________________________|_____________________________|
| Interface Stability | Evolving |
|_____________________________|_____________________________|
SEE ALSO
dhcpmgr(1M), dhtadm(1M), in.dhcpd(1M), pntadm(1M),
dhcp_network(4), dhcptab(4), dhcpsvc.conf(4),
nsswitch.conf(4), resolv.conf(4), user_attr(4), attri-
butes(5), dhcp(5), dhcp_modules(5), rbac(5)
System Administration Guide: IP Services
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