IPv6: Getting functional DHCPv6 and Route Advertising together

If you’re not into IPv6, but you’re a networking person – you may want to avert you eyes.  This next piece of information is going to cause you pain: DHCPv6 does not support/allow you to send default gateway.  This is “by design”. Does your brain hurt yet? I know mine did when I first found this out.  This seems to be the most bass-ackwards thing I’ve ever heard of, but...