pxe boot for ipv6 only machine not working on vmware

[S, Shilpashree 1. (Nokia - IN/Bangalore)]

Hi All,

We have a case to install machine with ipv6 only using pxe boot.
Using ISC dhcpv6 server and configured dhcpd6.conf as below

Dhcpd6.conf

default-lease-time 2592000;
preferred-lifetime 604800;
option dhcp-renewal-time 3600;
option dhcp-rebinding-time 7200;
allow leasequery;
option dhcp6.name-servers 3ffe:501:ffff:100:200:ff:fe00:3f3e;
option dhcp6.domain-search "test.example.com","example.com";
option dhcp6.bootfile-url code 59 = string;
option dhcp6.bootfile-url "tftp://[2a00:8a00:a000:1006::a3f:1fe4]/pxelinux.0";;


subnet6 2a00:8a00:a000:1006::/64 {
   range6 2a00:8a00:a000:1006::1 2a00:8a00:a000:1006::ffff:ffff;
   range6 2a00:8a00:a000:1006::/64 temporary;
   prefix6 2a00:8a00:a000:1006:: 2a00:8a00:a000:10f6::/64;

   host ipv6host {
   hardware ethernet 00:50:56:87:1c:70;
   fixed-address6 2a00:8a00:a000:1006::a3f:1fe9;
   }
}


Stopped iptables/ip6tables

System is supporting ipv6
sysctl -a | grep disable | grep ipv6
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.eth0.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0


After rebooting client machine , it is unable to discover the  dhcp ip of 
server.


Could anyone point out any mistake in the configuration .

Any help is much appreciated.

Thanks,
Shilpa