Find DHCPv6 server's IPv6 address

Operating Systems Linux Red Hat Find DHCPv6 server's IPv6 address

03-20-2017

Registered User

1, 0

Join Date: Mar 2017

Last Activity: 20 March 2017, 12:41 AM EDT

Posts: 1

Thanks Given: 0

Thanked 0 Times in 0 Posts

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

View Public Profile for bshalini

Find all posts by bshalini

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

What determines DNS will query IPV6 address?

When I do simple nslookup it does not generate any query for IPV6 (AAAA). But sometimes I see DNS query for both A and AAAA are generated. What decides this? The reason I do not want AAAA query is in most of the cases AAAA records are absent. Hence, if one DNS server fails, the clients keeps...

2. IP Networking

IPv6 address block assign/associate with an interface

Hello all, I am trying to receive (tcp/udp/sctp) traffic from all IPs and, eventually, all ports of an IPv6 address block using as few sockets as possible short of implementing my own network stack. One possible solution was to associate an IP block to an interface then bind to that...

3. Shell Programming and Scripting

How to extract IPv6 address from string?

Hi All, Would anyone know how to modify the below, so only the IPv6 address (red) is printed, please? (in other words, what's between inet6 and the / sign) ipv6=`/sbin/ifconfig lo0:5 inet6 | grep 'inet6'` print $ipv6 Currently the output of the above script is: inet6...

4. BSD

Link Local IPv6 Address

Hi, Am using FreeBSD7.4/i386 During IPv6 configuration, I added the following in rc.conf as Restarted IPv6 network using /etc/rc.d/network_ipv6 restart.. My problem is I need to set link local IPv6 address auto-configured.. Is my proceeding right?? I feel something missing to make...

5. HP-UX

configuring site-local IPv6 address

How do I configure site-local IPv6 address in HP-UX box? I can get link local IPv6 address automatically when I put IPv6 up. aps39-88-root# ifconfig lan0 inet6 up

6. Shell Programming and Scripting

Regular expression to extract ipv6 address

Hi all , I have a string in my weblog xheader v6-day-2011:xx:yy:zz:qq:qq:ww:ee:rr My requirement is to lookup the sting v6-day-2011 in this header and if found would like to extract the V6 ip part . v6-day-2011 is always constant for a ipv6 entry so i would like to extract every thing...

7. Solaris

IPMP + IPv6 test address

Hi, inspired by this article, I decided to implement IPMP + IPv6 in Solaris 10. It worked for me only this way: 1. Setup # cat /etc/hostname* 10.23.10.113/24 broadcast + group data failover up <- hostname.e1000g0 0.0.0.0/24 broadcast + group data -failover deprecated up standby...

8. Programming

validate IPV6 address in windows using c++

I know there is a function inet_tpon for unix platforms to validate ipv6 addresses.But i need an equivalent of windows.When i use this function with the header file <winsock2.h> the visual studio 2005 on win2003 issues an error saying identifier not found :confused:

9. IP Networking

IPv6 UDP server not accepting packets with global address

Hi All, I am running a IPv6 UDP server, which is bound to in6addr_any. When I send a packet from a client to the link-local address of any interface on the linux box, the server accepts the packets. But when I send the packets to the global address the server doesnt pick the packets. On...

10. UNIX for Dummies Questions & Answers

How to find i.p address of our server

I don't have root access. How do I find i.p address of our sun server? Thanks.

LEARN ABOUT DEBIAN

dhcp6ctl

DHCP6CTL(8)						    BSD System Manager's Manual 					       DHCP6CTL(8)

NAME

     dhcp6ctl -- DHCPv6 client and server control utility

SYNOPSIS

     dhcp6ctl [-C -| -S] [-k keyfile] [-p port] [-s address] command

DESCRIPTION

     dhcp6ctl controls the operation of a DHCPv6 process, which is either dhcp6c or dhcp6s, a DHCPv6 client or a server.  By default, dhcp6ctl
     controls a client.  The type of the process can also be specified explicitly by the -C or -S options.

     dhcp6ctl communicates with the DHCPv6 process over a TCP connection, sending commands authenticated with digital signatures.  Currently, the
     only supported authentication algorithm is HMAC-MD5, which uses a shared secret on each end of the connection.

     Command line options are as below:

     -C      Control a DHCPv6 client.  This option is exclusive with the -S option.

     -S      Control a DHCPv6 server.  This option is exclusive with the -C option.

     -k keyfile
	     Use keyfile to provide the shared secret to communicate with the process.	The default file name used when unspecified is
	     /etc/wide-dhcpv6/dhcp6cctlkey with a client, and /etc/wide-dhcpv6/dhcp6sctlkey with a server.

     -p port
	     Specify port as the listening port of the process.  The default port number used when unspecified is 5546 for a client, and 5547 for
	     a server.

     -s address
	     Specify address as the listening address of the process.  The default address used when unspecified is ::1.

KEY FILE

     Since the operation available with the dhcp6ctl command is powerful, the communication between the command and dhcp6c or dhcp6s must be
     authenticated.  The supported algorithm for authentication is HMAC-MD5, which requires a shared secret, and the secret is stored in the key
     file.  The key file must consist of a single line, in which the secret value is written in the form of BASE-64 encoding.

COMMANDS

     Each command specifies a single control operation.  Supported commands are as follows:

     reload  This command specifies the process to reload the configuration file.  Existing bindings, if any, are intact.
     remove arguments
	     This command is only applicable to a server.  This specifies the server to remove a run-time object specified by arguments from the
	     server.  Currently, the only possible object is one particular IA_NA or IA_PD binding, which is specified as 'binding IA IA_NA IAID
	     DUID' or 'binding IA IA_PD IAID DUID' where IAID is a decimal number specifying the IAID of the IA, and DUID is a DHCP Unique Identi-
	     fier of the binding.  The format of DUID is the same as that specified in dhcp6s.conf(5).
     start interface ifname
	     This command is only applicable to a client.  It tells the client to release the current configuration information (if any) on the
	     interface ifname and restart the DHCPv6 configuration process on the interface.
     stop interface ifname
	     This command is only applicable to a client.  It tells the client to release the current configuration information (if any) on the
	     interface ifname.	Any timer running for the interface will be stopped, and no more DHCPv6 messages will be sent on the interface.
	     The configuration process can later be restarted by the start command.
     stop    This command stops the specified process.	If the process is a client, it will release all configuration information (if any) and
	     exits.

FILES

     /etc/wide-dhcpv6/dhcp6cctlkey  is the default key file to communicate with a client.
     /etc/wide-dhcpv6/dhcp6sctlkey  is the default key file to communicate with a server.

SEE ALSO

     dhcp6s.conf(5) dhcp6s(8)

HISTORY

     The dhcp6ctl command first appeared in WIDE/KAME IPv6 protocol stack kit.

KAME
								 September 7, 2004							      KAME

Red Hat