ipv6 in the installer

So I just installed 4.6 on a sparcstation5 and an Ultra1 and I
was surprised to find the sparc installer doesn't seem to support
ipv6. It asked me about the ipv4 address but not ipv6 and in the
shell rtsol was there but wouldn't work. On the sparc64 it all
worked normally, and on the sparcstation5 I was able to setup
ipv6 normally in sysctl.conf and rc.conf after installation. Is
this intentional? Thanks.
Nick Schmalenberger