dhcp6c.conf

dhcp6c.conf(5)           Linux System Manager's Manual          dhcp6c.conf(5)



NAME
       dhcp6c.conf - configuration file of the DHCPv6 client daemon, dhcp6c


DESCRIPTION
       dhcp6c.conf is a configuration file for dhcp6c (DHCPv6 client).

       dhcp6c is configured by the configuration information (such as rapid-
       commit, requesting temp-address, or prefix-delegation) in this file.
       dhcp6c.conf is an ASCII text file and lines that start with # are
       comments.


       STATEMENTS

       interface <interface name>
       {
            [declarations]
       };
       Write configurations for this interface in this statement.  In
       [declarations], options can be specified.


       DECLARATIONS

       send [dhcpoptions];
       With this declaration, dhcp6c sends specified options.  Currently
       rapid-commit is defined.

       send rapid-commit;
       This declaration enables dhcp6c to request the dhcp6s server to perform
       a Rapid Commit.

       request [dhcpoptions];
       This declaration enables dhcp6c to request specified options.
       Currently temp-address, domain-name-servers, and prefix-delegation are
       defined.

       request domain-name-servers;
       The DHCPv6 mechanism provides a way to obtain configuration information
       such as a list of available DNS servers or NTP servers. This
       declaration enables dhcp6c to request a DNS server address from the
       DHCPv6 server.

       request prefix-delegation;
       This declaration enables dhcp6c to request a Prefix Delegation to the
       DHCPv6 server. dhcp6c gets a prefix assignment from the DHCPv6 server.

       request temp-address;
       This declaration enables dhcp6c to request temporary addresses.  dhcp6c
       requests Non-temporary Addresses as default. This option makes dhcp6c
       request Temporary Addresses.

       information-only;
       This declaration enables dhcp6c to request host configuration
       information from the DHCPv6 server. If dhcp6c doesn't need to be
       assigned any addresses, this option should be specified.

       address {
            [<ipv6 address>/<prefix length>];
            [prefer-life-time <preferred-lifetime>];
            [valid-life-time <valid-lifetime>];
       };
       This declaration defines the dhcp6c client preferred IPv6 address, the
       preferred lifetime of the address, and the valid lifetime for this
       interface.

       prefix {
            [<ipv6 prefix>/<prefix length>];
            [prefer-life-time <preferred-lifetime>];
            [valid-life-time <valid-lifetime>];
       };
       This declaration defines the dhcp6c client acting as a requesting
       router for the preferred prefix, the prefix length, and the prefix's
       preferred lifetime, and valid lifetime for this interface.

       prefer-life-time <preferred-lifetime>;
       This declaration sets the preferred lifetime (in seconds) of the
       address or prefix. This declaration is valid only in address or prefix
       declarations.

       valid-life-time <valid-lifetime>;
       This declaration sets the valid lifetime (in seconds) of the address or
       prefix.  This declaration is valid only in address or prefix
       declarations.

       renew-time <renew-time>;
       This declaration specifies the Renew Time (in seconds) for this
       Identity Association (IA). Renew Time is a T1 value in an IA option.
       dhcp6c sets the Renew Time in IA options to the specified value.

       rebind-time <rebind-time>;
       This declaration specifies the Rebind Time (in seconds) for this IA.
       Rebind Time is T2 value in an IA option. dhcp6c sets the Rebind Time in
       IA options to the specified value.


       DHCPOPTIONS

       rapid-commit
       If this option is used in a "send [dhcpoptions];" declaration, dhcp6c
       sends DHCPv6 messages with a Rapid Commit option.

       domain-name-servers
       If this option is used in a "request [dhcpoptions];" declaration,
       dhcp6c requests the DNS server address via the DHCPv6 mechanism.

       prefix-delegation
       If this option is used in a "request [dhcpoptions];" declaration,
       dhcp6c requests a Prefix Delegation to the DHCPv6 servers.

       prefix-delegation-interface <interface name>
       Specifies the name of the interface definition in radvd.conf
       that dhcp6c will write the 'prefix' declaration for. By default,
       dhcp6c will write a radvd.conf prefix declaration for the interface
       on which it receives the prefix delegation lease.

       use-ra-prefix;
       This declaration tells the client not to request the address prefix
       configured in the server's address or range statements. With this
       option, client address prefixes can be set only by router
       advertisements, and the prefix configured in server address or range
       statements will be ignored. This is a Red Hat extension; previously,
       the only way to set client address prefixes was by router
       advertisement.


EXAMPLES
       This is a sample of the dhcp6c.conf file.
       interface eth0 {
            send rapid-commit;
            request prefix-delegation;
            request domain-name-servers;
            request temp-address;
            iaid 11111;
            address {
                 3ffe:10::10/64;
                 prefer-life-time 6000;
                 valid-life-time 8000;
            };
            renew-time 11000;
            rebind-time 21000;
       };


SEE ALSO
       Dynamic Host Configuration Protocol for IPv6 (DHCPv6), IPv6 Prefix
       Options for DHCPv6, dhcp6c(5)


AUTHORS
       Kazuo Hiekata <hiekata@yamato.ibm.com>





dhcp6c.conf                      17 March 2003                  dhcp6c.conf(5)