Okay giving it the simple configuration like that i get
cat /var/log/messages
Jan 31 13:09:59 ubnt radvd[3907]: no auto-selected prefix on interface switch0, disabling advertisements Jan 31 13:10:00 ubnt radvd[3908]: exiting, 1 sigterm(s) received Jan 31 13:10:00 ubnt radvd[3909]: Exiting, privsep_read_loop had readn return 0 bytes Jan 31 13:10:00 ubnt radvd[3909]: Exiting, privsep_read_loop is complete. Jan 31 13:11:56 ubnt radvd[4154]: no auto-selected prefix on interface switch0, disabling advertisements Jan 31 13:11:57 ubnt radvd[4155]: exiting, 1 sigterm(s) received Jan 31 13:11:57 ubnt radvd[4156]: Exiting, privsep_read_loop had readn return 0 bytes Jan 31 13:11:57 ubnt radvd[4156]: Exiting, privsep_read_loop is complete. Jan 31 13:11:58 ubnt radvd[4185]: no auto-selected prefix on interface switch0, disabling advertisements Jan 31 13:12:07 ubnt radvd[4186]: exiting, 1 sigterm(s) received Jan 31 13:12:07 ubnt radvd[4187]: Exiting, privsep_read_loop had readn return 0 bytes Jan 31 13:12:07 ubnt radvd[4187]: Exiting, privsep_read_loop is complete. Jan 31 13:12:08 ubnt radvd[4299]: no auto-selected prefix on interface switch0, disabling advertisements Jan 31 13:12:29 ubnt radvd[4301]: exiting, 1 sigterm(s) received Jan 31 13:12:29 ubnt radvd[4302]: Exiting, privsep_read_loop had readn return 0 bytes Jan 31 13:12:29 ubnt radvd[4302]: Exiting, privsep_read_loop is complete. Jan 31 13:12:30 ubnt radvd[4442]: no auto-selected prefix on interface switch0, disabling advertisements Jan 31 13:12:51 ubnt radvd[4445]: exiting, 1 sigterm(s) received Jan 31 13:12:51 ubnt radvd[4446]: Exiting, privsep_read_loop had readn return 0 bytes Jan 31 13:12:51 ubnt radvd[4446]: Exiting, privsep_read_loop is complete. Jan 31 13:12:52 ubnt radvd[4596]: no auto-selected prefix on interface switch0, disabling advertisements Jan 31 13:13:11 ubnt radvd[4599]: exiting, 1 sigterm(s) received Jan 31 13:13:11 ubnt radvd[4600]: Exiting, privsep_read_loop had readn return 0 bytes Jan 31 13:13:11 ubnt radvd[4600]: Exiting, privsep_read_loop is complete. Jan 31 13:13:13 ubnt radvd[4722]: no auto-selected prefix on interface switch0, disabling advertisements
cat /var/log/dhcp6c.log
Jan/31/2017 13:14:07: update_ia: status code for PD-0: no prefixes Jan/31/2017 13:14:07: update_ia: status code for NA-0: no addresses Jan/31/2017 13:14:08: dhcp6_get_options: unknown or unexpected DHCP6 option opt_82, len 4 Jan/31/2017 13:14:08: update_ia: status code for PD-0: no prefixes Jan/31/2017 13:14:08: update_ia: status code for NA-0: no addresses Jan/31/2017 13:14:08: dhcp6_get_options: unknown or unexpected DHCP6 option opt_82, len 4 Jan/31/2017 13:14:08: update_ia: status code for PD-0: no prefixes Jan/31/2017 13:14:08: update_ia: status code for NA-0: no addresses Jan/31/2017 13:14:08: dhcp6_get_options: unknown or unexpected DHCP6 option opt_82, len 4 Jan/31/2017 13:14:08: client6_recvadvert: unexpected advertise Jan/31/2017 13:14:08: dhcp6_get_options: unknown or unexpected DHCP6 option opt_82, len 4 Jan/31/2017 13:14:08: update_ia: status code for PD-0: no prefixes Jan/31/2017 13:14:08: update_ia: status code for NA-0: no addresses Jan/31/2017 13:14:08: dhcp6_get_options: unknown or unexpected DHCP6 option opt_82, len 4 Jan/31/2017 13:14:08: client6_recvadvert: XID mismatch Jan/31/2017 13:14:09: dhcp6_get_options: unknown or unexpected DHCP6 option opt_82, len 4 Jan/31/2017 13:14:09: update_ia: status code for PD-0: no prefixes Jan/31/2017 13:14:09: update_ia: status code for NA-0: no addresses Jan/31/2017 13:14:09: dhcp6_get_options: unknown or unexpected DHCP6 option opt_82, len 4 Jan/31/2017 13:14:09: update_ia: status code for PD-0: no prefixes Jan/31/2017 13:14:09: update_ia: status code for NA-0: no addresses Jan/31/2017 13:14:09: dhcp6_get_options: unknown or unexpected DHCP6 option opt_82, len 4 Jan/31/2017 13:14:09: client6_recvadvert: unexpected advertise Jan/31/2017 13:14:09: dhcp6_get_options: unknown or unexpected DHCP6 option opt_82, len 4 Jan/31/2017 13:14:09: client6_recvreply: XID mismatch Jan/31/2017 13:14:10: dhcp6_get_options: unknown or unexpected DHCP6 option opt_82, len 4 Jan/31/2017 13:14:10: update_ia: status code for PD-0: no prefixes Jan/31/2017 13:14:10: update_ia: status code for NA-0: no addresses
and also get high cpu usage RN
top
%Cpu(s): 82.7 us, 16.7 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.7 si, 0.0 st KiB Mem: 254976 total, 214432 used, 40544 free, 13812 buffers KiB Swap: 0 total, 0 used, 0 free, 63088 cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 5224 root 20 0 12176 6212 3084 R 11.9 2.4 0:01.34 vyatta_gen_radv 5250 root 20 0 10912 4880 2908 R 11.9 1.9 0:00.81 dhcpv6-pd-respo 5227 root 20 0 12432 6320 3136 R 11.6 2.5 0:01.27 dhcpv6-pd-respo 5263 root 20 0 10200 4160 2852 R 11.6 1.6 0:00.58 dhcpv6-pd-respo 5235 root 20 0 11664 5792 3084 R 11.3 2.3 0:01.11 dhcpv6-pd-respo 5239 root 20 0 11400 5536 3056 R 11.3 2.2 0:01.00 dhcpv6-pd-respo 5241 root 20 0 11400 5532 3056 R 11.3 2.2 0:00.98 dhcpv6-pd-respo 5269 root 20 0 9952 3712 2492 R 11.3 1.5 0:00.46 dhcpv6-pd-respo 5222 root 20 0 12648 6592 3136 R 11.0 2.6 0:01.36 dhcpv6-pd-respo 5225 root 20 0 12432 6320 3136 R 11.0 2.5 0:01.31 dhcpv6-pd-respo 5231 root 20 0 11876 5944 3084 R 11.0 2.3 0:01.20 dhcpv6-pd-respo 5237 root 20 0 11400 5536 3056 R 11.0 2.2 0:01.03 dhcpv6-pd-respo 5253 root 20 0 10692 4696 2864 R 11.0 1.8 0:00.73 dhcpv6-pd-respo 5259 root 20 0 10464 4416 2856 R 11.0 1.7 0:00.64 dhcpv6-pd-respo 5261 root 20 0 10200 4420 2856 R 11.0 1.7 0:00.58 dhcpv6-pd-respo 5265 root 20 0 10068 4160 2852 R 11.0 1.6 0:00.52 dhcpv6-pd-respo 5267 root 20 0 9952 3712 2492 R 11.0 1.5 0:00.48 dhcpv6-pd-respo 5210 root 20 0 12912 6844 3160 R 10.8 2.7 0:01.44 dhcpv6-pd-respo 5219 root 20 0 12648 6588 3136 R 10.8 2.6 0:01.36 dhcpv6-pd-respo 5229 root 20 0 12168 6068 3096 R 10.8 2.4 0:01.21 dhcpv6-pd-respo 5233 root 20 0 11796 5792 3084 R 10.8 2.3 0:01.15 dhcpv6-pd-respo 5244 root 20 0 11136 5184 3040 R 10.8 2.0 0:00.88 dhcpv6-pd-respo 5246 root 20 0 11136 5180 3040 R 10.8 2.0 0:00.85 dhcpv6-pd-respo 5255 root 20 0 10692 4696 2864 R 10.8 1.8 0:00.67 dhcpv6-pd-respo 5271 root 20 0 5524 2776 1824 R 9.3 1.1 0:00.33 dhcpv6-pd-respo 5273 root 20 0 5524 2780 1824 R 8.8 1.1 0:00.31 dhcpv6-pd-respo 4094 root 20 0 2416 1116 744 R 7.9 0.4 0:11.28 dhcp6c 5275 root 20 0 5524 2776 1824 R 7.6 1.1 0:00.27 dhcpv6-pd-respo 5277 root 20 0 5180 2556 1792 R 6.2 1.0 0:00.22 dhcpv6-pd-respo 559 root 20 0 29572 1424 1116 S 5.7 0.6 0:10.58 rsyslogd 5279 root 20 0 5180 2292 1776 R 5.4 0.9 0:00.19 dhcpv6-pd-respo 5281 root 20 0 4916 2032 1600 R 3.4 0.8 0:00.12 dhcpv6-pd-respo 5283 root 20 0 4916 2032 1600 R 2.5 0.8 0:00.09 dhcpv6-pd-respo 5285 root 20 0 4916 1768 1476 R 2.0 0.7 0:00.07 dhcpv6-pd-respo