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Old 02-03-2014, 05:31 PM   #1
firask317
LQ Newbie
 
Registered: Feb 2012
Posts: 13

Rep: Reputation: Disabled
ISC dhcpd6 in Stateless Mode and IPv6 Multicast


Hello there!
I am in the process of implementing IPv6 in the office. The office computers are assigned IPv6 addresses by auto configuration (using network discovery protocol RD and RA). However, I have faced a problem distributing the other information, mainly the DNS server IPv6 addresses!
ISC dhcpd V4.1.1-P1 is supposed to function in a stateless mode but it does not seem to work properly on my RHEL 6.4 server. This is my configuration file (the used IPv6 addresses are faked):

Code:
option dhcp6.name-servers 2beb:beb::1;
option dhcp6.domain-search "example.com";

subnet6 2beb:beb:0:f::/64 {
}
I had to use subnet6, although it does not have any ranges defined, because dhcpd won't listen on any interface if there is no subnet6 configured.

My question is: I can see DHCP6 solicit messages coming from clients but there are no advertises, requests or replies!

02:13:13.303385 IP6 fe80::250:56ff:fea0:68b7.dhcpv6-client > ff02::1:2.dhcpv6-server: dhcp6 solicit
02:13:15.455727 IP6 fe80::250:56ff:fea0:68b7.dhcpv6-client > ff02::1:2.dhcpv6-server: dhcp6 solicit
02:13:19.680067 IP6 fe80::250:56ff:fea0:68b7.dhcpv6-client > ff02::1:2.dhcpv6-server: dhcp6 solicit


What do you think the reason is?

My second question: The clients did no request any information from the DHCP6 server. I had to emulate a DHCP6 solicit message with dhclient -6
Why? How can I get the clients to request the IPv6 addresses of the DNS servers from the DHCP6 server?

Thanks!
Firas
 
Old 02-03-2014, 06:17 PM   #2
firask317
LQ Newbie
 
Registered: Feb 2012
Posts: 13

Original Poster
Rep: Reputation: Disabled
Please ignore my second question. I should have searched better before asking it. The answer is to use DHCPV6C and DHCPVC6_OPTIONS in ifcfg-ethx.

I appreciate your help with my first question.
 
  


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