Autoconfigure vs. Static Addressing

I have a few quesions about ipv6 on OpenBSD. Recently we've gotten native
ipv6 at my employer. Using a static address, as follows, things work fine.


# ifconfig fxp0 inet6 2001:x:y:301::5 prefixlen 64
# route -n add -inet6 default 2001:x:y:301::1
# ping6 -c 3 -n www.kame.net
16 bytes from 2001:200:0:8002:203:47ff:fea5:3085, icmp_seq=0 hlim=48 time=177.644 ms
16 bytes from 2001:200:0:8002:203:47ff:fea5:3085, icmp_seq=1 hlim=48 time=177.341 ms
16 bytes from 2001:200:0:8002:203:47ff:fea5:3085, icmp_seq=2 hlim=48 time=177.307 ms

So that works. However, is this the safest way to be doing v6 autoconfigure?

$ grep inet6 /etc/sysctl.conf
net.inet6.ip6.forwarding=0
net.inet6.ip6.accept_rtadv=1

$ cat /etc/hostname.fxp0
inet 10.19.81.180 255.255.255.128 NONE 
inet6 rtsol

Rebooting works fine, but running `sh /etc/netstart` gives me...

$ sh /etc/netstart
ifconfig: rtsol: no address associated with name

Thanks.

- Eric