dhcpv6clientd(1M)

NAME

dhcpv6clientd — DHCPv6 client daemon

SYNOPSIS

/usr/sbin/dhcpv6clientd [-d config_options] [-l]

DESCRIPTION

dhcpv6clientd obtains the configuration parameters from the Dynamic Host Configuration Protocol (DHCPv6) server to configure the host. See dhcpv6d(1M).

Options

dhcpv6clientd supports the following options:

-d config_options

Specify the list of parameters that the client daemon must request from the server daemon. The list of configuration parameters that the client can request are listed below:

dns_sa: Obtain the DNS server address
dns_sx: Obtain the DNS suffix
ntp_sa: Obtain the NTP server address
nis_dn: Obtain the NIS domain name
nis_sa: Obtain the NIS server address
nispcl_dn: Obtain the NIS+ client domain address
nisp_sa: Obtain the NIS+ server address
slp_da: Obtain the SLP Directory Agent (DA) address and it's scope
slp_ss: Obtain the SLP service scope
tz: Obtain the timezone information

-l

Enable the logging of all messages by dhcpv6clientd to the /var/adm/syslog/syslog.log file, including the information and warning types.

Configuration

The /etc/rc.config.d/netconf-ipv6 file is used for the configuration of the interfaces. To invoke dhcpv6clientd using the dhcpv6config script, set the DHCPV6_ENABLE [index] variable to a non-zero value in the /etc/rc.config.d/netconf-ipv6 file. The dhcpv6config script invokes dhcpv6clientd and dhcpv6client_ui during bootup to obtain IP addresses. dhcpv6clientd can also be invoked at the command prompt.

Once dhcpv6clientd has obtained the configuration parameters from the server, it stores them in a configuration file named /etc/dhcpv6client.data. The configuration parameters are valid for a fixed time, the lease time.

The format of the configuration information in /etc/dhcpv6client.data file is shown below:

code length data
00 <length> End of the record (EOR) 01 <length> Interface name 02 <length> Address of the DHCP server 03 <length> UUID 04 <length> IA 05 <length> T1 06 <length> T2 07 <length> Group Multicast Address 08 <length> DNS Server Address 09 <length> DNS Suffix 10 <length> NTP Server Address 11 <length> NIS Domain Name 12 <length> NIS Server Address 13 <length> NIS+ Client Domain Name 14 <length> NIS+ Server Address 15 <length> SLP DA address and its scope 16 <length> SLP Service Scope 17 <length> Time Zone 18 <length> Retransmission Variables

The <length> field denotes the length of the data field following it.

All these lines collectively indicate one record. The configuration file will have a series of record. See the EXAMPLE section below for a sample configuration file.

Since this file contains all the configuration information, it can be used to identify the server from which the configuration parameters were obtained.

When dhcpv6clientd is invoked, it will first try to read the configuration file, /etc/dhcpv6client.data. However, the configuration file

1.: may have been deleted or is not available for reading;
2.: may be corrupted or contain irrelevant data for a particular interface;
3.: may not contain the configuration information for a particular interface.

In those cases, dhcpv6clientd needs to obtain a new set of addresses from the server. Thus the client will form a SOLICIT message and send it to the pre-determined ALL DHCP Agents address. In response to this, the client will receive the ADVERTISE message from DHCP servers. The client will select a DHCP server based on the DHCP server preference value.

EXAMPLES

dhcpv6clientd treats the NIS server and DNS server addresses as default configuration parameters.

      dhcpv6clientd -d nis_sa dns_sa

The following is an example of a /etc/dhcpv6client.data file:

4 lan4 
16 3ffe::1234 
8 22:c2:00:10:83:b9:53:3c 
29 4 3ffe::428d 64 1005134643 1005134663 
4 1005134548 
4 1005134551 
0 
32 3ffe::12 3ffe::19 
6 hp.com 
16 3ffe::19 
12 india.hp.com 
32 3ffe::13 3ffe::19 
12 india.hp.com 
32 3ffe::15 3ffe::19 
22 16 3ffe::15 (proxy=rio) 0 
0 
0 
0 
0 
0 

AUTHOR

dhcpv6clientd was developed by Hewlett-Packard.

FILES

/etc/dhcpv6tab
/etc/rc.config.d/netconf-ipv6
/etc/dhcpv6client.data: Client configuration database file.

dhcpv6clientd(1M)

Technical documentation

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