Find DHCPv6 server's IPv6 address

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03-20-2017

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Find DHCPv6 server's IPv6 address

I want to find out the DHCPv6 server's ip address in the network. I went through the lease files but could find only duid/server-id and not the IPv6 address of the dhcp server. And I couldn't find any commands to get that information. Is there a way to get the DHCPv6 server's IPv6 address?

If I configured my machine to get an IPv4 dhcp address, I can see the lease files having the dhcp server's address. This made me think.. whether DHCP6 servers really expose their IPv6 addresses?

Basically looking for commands or system utility apis to get DHCPv6 server's IPv6 address in suse(sles11,sles12,sled) and red-hat(rhel6.8 and rhel7).
Thanks in advance for your help..

bshalini

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dhcpv6clientd

dhcpv6clientd(1M)														 dhcpv6clientd(1M)

NAME

       dhcpv6clientd - DHCPv6 client daemon

SYNOPSIS

       config_options] number] list_of_user_classes] list_of_vendor_classes]

DESCRIPTION

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

   Options
       supports the following options:
       Specify	the  default  list of parameters that the client daemon must request from the server daemon.  If this option is not specified, the
       client daemon will request all the configuration parameters mentioned below.  The list of configuration	parameters  that  the  client  can
       request are listed below:
	      Obtain a list of one or more IPv6 addresses of DNS recursive name servers to which a client's DNS resolver may send DNS queries.

	      Obtain the domain search list that the client must use while resolving hostnames
		     using DNS.

	      Obtain the list of IPv6 addresses that indicate SIP outbound proxy servers
		     available to the client.

	      Obtain the domain names of the SIP outbound proxy servers that the client
		     can use.

	      Obtain the list of IPv6 addresses of one or more NIS servers
		     available to the client.

	      Obtain the NIS domain name of the client.

	      Obtain the list of IPv6 addresses of one or more NIS+ servers
		     available to the client.

	      Obtain the NIS+ domain name of the client.

       Specifies the vendor's registered enterprise number as registered with IANA.
	      This number can be used in the vendor-class and vendor-specific options while communicating with the server.

       Enables
	      to log all messages to the file, including information and warning messages.

       Specify the User-Class data used to represent the client in its
	      communication  with the server. This option can have a maximum length of 16 characters. Multiple options can be used to specify mul-
	      tiple values for the User-Class data.  Depending on the classes identified by this option, the server selects configuration informa-
	      tion for the client. The User-Class option is used to identify the type or category of the client.

       Specify the vendor-class data to be used in the client's communication
	      with  a  server.	The  vendor-class  data  contains  a  series of distinct items, each of which describes the characteristics of the
	      client's hardware configuration.

   Configuration
       The file is used for the configuration of the interfaces. To invoke using the script, set the variable to a non-zero value in the file. The
       script invokes and during bootup to obtain IP addresses.  can also be invoked at the command prompt.

       Once  has  obtained the configuration parameters from the server, it stores them in a configuration file named The configuration parameters
       are valid for a fixed time, the lease time.  The automatically tries to renew the configuration parameters before  the  expiration  of  the
       lease time. If the server responds, the lease times of the configuration parameters are automatically extended.

AUTHOR

       was developed by Hewlett-Packard.

FILES

       Interface configuration file.

       Client configuration database file.

SEE ALSO

       dhcpv6d(1M), syslog(3C).

																 dhcpv6clientd(1M)

Red Hat