I’ve been running SP1 with a fully-configured IPv6 stack for some time. I installed SP2 today and two things happened:

1. It appears that the Teredo tunnel now takes precedence over an actual, working IPv6 stack. I was unable to connect via IPv6 to local resources and “ping” returned insanely long response times (300 ms vs. the 1 ms it should have been).

To disable this from the command prompt I issued the command:

netsh interface teredo set state disabled

This smells like a bug to me, and at the very least it’s annoying if you have IPv6 connectivity.

2. It appears that the IPv6 privacy settings get reset, so if you have a static IP you won’t end up using it, but instead will use a rotating IPv6 IP. To disable this from the command prompt:

netsh interface ipv6 set privacy state=disable

You’ll have to restart after setting this (at least I did).

I’m a Linux & UNIX guy, and really don’t count myself as a Windows expert, as I know just enough to be dangerous. :-) If someone can add to this (and not just MS bashing[0]) please leave a comment.

—————————-

[0] Every OS vendor has situations like this where a patch changes the behavior of a component. In my experiences Microsoft isn’t even close to being the worst offender.

This post written by Bob Plankers for The Lone Sysadmin. Unless otherwise noted it is © 2010 Bob Plankers and licensed under the Creative Commons BY-NC-SA 3.0 license.

Related Posts

1. Disable Temporary IPv6 IPs in Windows Vista
2. IPv6
3. I Don’t Like Microsoft Windows Vista

She asks a question at the end about computer science education, and its relevance to IT jobs. “Are today’s college courses relevant to the technologies actually used in today’s data center?”

My response: yes and no.

Yes, in that my CS education taught me the fundamentals of programming, program design, APIs, and operating systems. My solid understanding of operating system concepts has served me well. I understand how an OS makes scheduling decisions, allocates resources, and interacts with applications much better than many of my peers. I also understand programming language concepts very well, too, which helps a lot when dealing with my developer brethren.

No, in that CS departments seem to fancy themselves as being “better” than technical colleges. Actual practical experience isn’t something they are interested in, because they’re teaching the theory. For folks interested in IT, though, the theory is useful but some practical experience is necessary, too. Many business schools have MIS degrees that go more into the practical aspects of being an IT worker. Those get heavy into the business end of things, with budgets, marketing, etc. A good balance of theory and fundamentals, mixed with business concepts like budgets, isn’t something that I’ve ever seen in a four year university program.

Then again, maybe I haven’t been looking in the right places, either.

This post written by Bob Plankers for The Lone Sysadmin. Unless otherwise noted it is © 2010 Bob Plankers and licensed under the Creative Commons BY-NC-SA 3.0 license.

Related Posts

1. inodes, or “Why is my disk full, but it isn’t?”
2. Just Because You Deleted A File Doesn’t Mean It’s Gone
3. Good Old FORTRAN 77