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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LEARN ABOUT DEBIAN

dibbler-client

dibbler-client(8)						      Dibbler							 dibbler-client(8)

NAME

       dibbler-client - a portable DHCPv6 client

DESCRIPTION

       dibbler-client  is  a  portable	implementation	of the DHCPv6 client. It supports both stateful (i.e. IPv6 address granting) and stateless
       (i.e. options granting) autoconfiguration. There are ports available for Linux 2.4/2.6 systems as well as MS Windows XP and 2003. They  are
       freely available under GNU GPL version 2 (or later) license.

SYNOPSIS

       dibbler-client [ run | start | stop | status | install | uninstall ]

OPTIONS

       run - starts client in the console. Client can be closed using ctrl-c.

       start - starts client in daemon mode.

       stop - stops running clients.

       status - shows status of the client and server.

       install - installs client as a service. This is not implemented yet.

       uninstall - uninstall client service. This is not implemented yet.

EXAMPLES

       Let's  start  with  simple  configuration.  We want receive one IPv6 address and there is only one Ethernet interface present. In that case
       client.conf file might be completly empty. Dibbler client will request for one IPv6 address on  each  up,  running  and	multicast  capable
       interface (except loopback).

       Now  some  real	example.  We  want one IPv6 address and receive DNS servers and domain name. We are also not interested in the details, so
       debug mode is disabled.

       log-mode short
       log-level 6
       iface eth0
       {
	 ia { }
	  option dns-server
	  option domain
       }

       Next example: we want only NIS domain and NIS server information. That information should  be  periodicaly  renewed,  so  we  use  lifetime
       option. We don't need any addresses so stateless mode is used.

       log-mode short
       iface eth0
       {
	 stateless
	 option nis-server
	 option nis-domain
	 option lifetime
       }

       More examples can be found in the User's Guide.

FILES

       All  files are created in the /var/lib/dibbler directory. Dibbler client reads /var/lib/dibbler/client.conf file. During operation, Dibbler
       saves various file in that directory. After reception of the DNS servers or domain informations, they are  added  to  the  /etc/resolv.conf
       file.  After  shutdown,	that  information  is  removed	from  that file. Option values are stored in the option-* files. Log file is named
       client.log.

STANDARDS

       This implementation aims at conformance to the following standards:

       RFC 3315 DHCP for IPv6

       RFC 3319 SIP options for DHCPv6

       RFC 3646 DNS server options for DHCPv6

       RFC 3736 Stateless DHCPv6

       RFC 3898 NIS options for DHCPv6

       Also options specified in following drafts are implemented:

       draft-ietf-dhc-dhcpv6-opt-timeconfig-03.txt NTP and timezone options.

       draft-ietf-dhc-dhcpv6-opt-lifetime-00.txt Option renewal.

BUGS

       Bugs are tracked with bugzilla, available at http://klub.com.pl/bugzilla/. If you belive you have found a bug, don't hesitate to report it.

AUTHOR

       Dibbler was developed as master thesis on the Technical University of Gdansk by Tomasz Mrugalski and Marek Senderski. Currently	Marek  has
       not enough free time, so this project is being developed by Tomasz Mrugalski. Authors can be reached at thomson@klub.com.pl and msend@o2.pl

SEE ALSO

       There  is  dibbler-server(8) manual page. You are also advised to take a look at project website located at http://klub.com.pl/dhcpv6/.	As
       far as authors know, this is the only Windows DHCPv6 stateful implementation available. It is also one of two freely available under Linux.
       The other Linux implementation is available at http://dhcpv6.sourceforge.net, but it is rather outdated and seems not being actively devel-
       oped.

GNU
								    2004-12-11							 dibbler-client(8)

Red Hat