It looks like I'm being delegated a /64 from Comcast no matter what I ask for.
Here's the relevant portion of my dhcpcd.conf: interface re1 ipv6rs ia_na 0 ia_pd 1/::/60 vlan10/1/64 vlan1001/2/64 I've also tried ia_pd 1/::/56 my original config line before testing was: ia_pd 1 vlan10/0 In the logs, I see: Oct 4 23:36:21 host dhcpcd[59994]: re1: rebinding prior DHCPv6 lease Oct 4 23:36:21 host dhcpcd[59994]: vlan10: activating for delegation Oct 4 23:36:21 host dhcpcd[59994]: vlan10: carrier acquired Oct 4 23:36:21 host dhcpcd[59994]: vlan10: IAID xx:xx:xx:xx Oct 4 23:36:21 host dhcpcd[59994]: vlan1001: activating for delegation Oct 4 23:36:21 host dhcpcd[59994]: vlan1001: carrier acquired Oct 4 23:36:21 host dhcpcd[59994]: vlan1001: IAID xx:xx:xx:xx Oct 4 23:36:22 host dhcpcd[59994]: re1: soliciting an IPv6 router Oct 4 23:36:22 host dhcpcd[59994]: re1: REPLY6 received from fe80::201:5cff:fe75:1246 Oct 4 23:36:22 host dhcpcd[59994]: re1: adding address 1234:123:1234:12:1234:123:123:1234/128 Oct 4 23:36:22 host dhcpcd[59994]: re1: renew in 161952, rebind in 259123, expire in 345600 seconds Oct 4 23:36:22 host dhcpcd[59994]: lo0: adding reject route to 1234:123:1234:5d6f::/64 via ::1 Oct 4 23:36:22 host dhcpcd[59994]: re1: delegated prefix 1234:123:1234:5d6f::/64 Oct 4 23:36:22 host dhcpcd[59994]: vlan10: invalid prefix 1234:123:1234:5d6f::/64 + 1/64: Result too large Oct 4 23:36:22 host dhcpcd[59994]: vlan1001: invalid prefix 1234:123:1234:5d6f::/64 + 2/64: Result too large
