On spanning tree and virtual router priorities

Work August 4th, 2008

I never seem to remember which way this goes, and usually when I need to look it up (like my network is in a weird state,) I can’t check to see how it “should” be. So this post is a reminder — at least on the Foundry equipment we’re currently running.

Spanning tree priorities — lowest number wins. (Unless set priorities are equal, in which case, I think the lower switch MAC wins.) In our environment, a 1000 weighted STP is the root over a 2000 weighted instance.

With VRRP-E, it’s the opposite. Higher priority wins. The default priority with our FI1500s is 100. Any backup priorities lower than that are secondary.

So, the “active” router should have a lower STP priority and a higher VRRP-E priority.

The “backup” router should have a higher STP priority and a lower VRRP-E priority.

Clear as mud.

First step in the strategic plan

General, Work March 15th, 2007

Step 1. Set up a strategic plan website.
Step 2. ???
Step 3. Profit.

backups of /var were hanging

Work November 27th, 2006

… but I figured out why. This is how I explained it to Josh:

[09:10] trombonekenny: I just deleted a 1.2T /var/log/lastlog file
[09:10] JoshMeans: wow
[09:10] trombonekenny: which is impressive
[09:10] trombonekenny: considering /var is only a 2G disk

[09:10] JoshMeans: lol
[09:10] JoshMeans: inode issues?

[09:10] trombonekenny: explains why backups were failing
[09:11] trombonekenny: “I’m going to read you a 1.2T file.” “Okay, shoot.” “Wait a minute, I don’t know where to find that.”
[09:11] trombonekenny: “I think I’ll just timeout.”

[09:12] JoshMeans: heh

(Edit 11/27 4pm: wikipedia links added to follow some of the geekiness, although it messed up my color scheme. In the comments, you can see that V. used the safeword “Steve”. In my social group, that means “I’ve stopped paying attention because you geeked out on me too much.” It applies to computer talk, music theory, highlights (and lowlights) of elementary education, and pretty much everything.)

the last lesson

General, Quotes, Work October 31st, 2005

Since CITES is nuking this out of ph tomorrow, I wanted to save the quote here:

“Perhaps the most valuable result of all education is the ability to make yourself do the thing you have to do, when it ought to be done, whether you like it or not; it is the first lesson that ought to be learned; and however early a man’s training begins, it is probably the last lesson that he learns thoroughly.”

– Thomas Henry Huxley

It’s sad that CITES is working on two different projects for directory services and authentication services, and (oddly, but par for the course for this campus,) they are distinct focus groups. Although they’re similar services, they’ll design them separately. Until 5 years later someone decides that’s dumb and starts a third project group to unify them.

But it’s better than it used to be.

I just lament campus doesn’t want to be a facebook/phone book anymore. (I’ll save the rant about moving from structured data to a reliance on unstructured data for another day.) I also think it’s funny the quote above directly applies to doing the hard work needed to really have a good, solid, extendable directory service.

Making the Visible the Invisible

Education & Development, Technology, Work September 17th, 2005

Since I heard about the Ambient Orbs (jealous of you, EJ,) I’ve been trying to figure out different ways to take everyday information and put it into discrete or abstract, digital or analog displays. I think that finding new ways of mapping/associating/displaying potentially disjoint information will be a part of my graduate studies/research.

In the meantime, I ran across this and was very impressed. Making Visible the Invisible display at the Seattle Public Library. I want to do something similar to that, at Siebel Center, on its display wall, with IT information from the department or campus.

No hot undocking

Technology, Work September 6th, 2005

Aaron surprised me this weekend by telling me his Dell Latitude D610 laptop, which is pretty identical to my D600 laptop, supports hot undocking. He can press the undock button and disconnect without having to put the laptop in standby mode. He and I are pretty mobile with our laptops, but use them as desktop/docked machines. I like the idea of not having to sleep the laptop and wake it back up, log back in each time I leave the desk.

So I found this flyer on Undock and Go which states it’s on all the newer laptops. Daaaamn. That’s a feature I want, and my laptop isn’t that old!

I tried a BIOS update, and a few more seemingly obvious updates for my D600 to have this functionality, but each time I press the undock button, it goes to standby. I hope that this would be a software feature, but maybe it is tied to the hardware/motherboard. I opened a case with Dell’s online support (echat) but I think I’ll take it to email.

Anyone have any ideas/pointers on where I can adjust the Undocking button features in Windows? (Assuming the BIOS and chipsets are set.)

[ Edit: After talking to Dell through their web chat, email, and phone support, it was as I feared. A chipset change between D600 and D610 allows for hot undocking -- this isn't something I can enable via BIOS or driver updates. The best I can hope for is that TSG orders a D610 and I upgrade. Until then, I'm stuck in standby -- literally. ]

[ Edit 9/14/05: Turns out Dell was wrong! While mucking around in the BIOS today for another reason, I found a toggle that controls if undocking goes to standby or keeps the system live. I set that to keep the system live, and now I'm able to undock and go as I had hoped. Yay for the features, but boo to the *three* Dell technicians who didn't know about the BIOS feature, or tell me to look there. Granted, I should have thought to look there too, but that's what you call support for. At this point, I'm just happy it does what I want. ]

Late August security incidents

Technology, Work August 18th, 2005

There’s definately a correlation between computer security incidents and late August. Sasser, then Sobig. This week I’ve probably gotten 6 emails from CITES security on all sorts of new exploits and patches (or workarounds) from Microsoft, or Adobe, or Apple. What is it about the return of hundreds of thousands of students to colleges where their unpatched-from-the-summer-computers get turned back on to high speed, well-connected networks that makes netadmins and security analysts so nervous?

Oh, yeah. Exactly that. But even so, why so much publicity around late August. Some of these vulnerability have been around for months. Do hackers go overdrive in the summer, causing more ‘ploits in August? Do they think about college students coming back? Or do developers work all summer on their bugfixes and roll out the patch packages in mid-August, when they hope more people will install them?

Or am I just naturally busier in August? Security incidents/reports/notices pull me away from my other projects, and I notice them more?

Sky rockets in flight

Science & Nature, Technology, Work July 21st, 2005

Afternoon delight. Er, um, I guess mid-morning delight. From the Return to Flight website:

NASA officials have announced plans to the begin the countdown to a July 26 launch of Space Shuttle Discovery. The countdown will start Saturday, with a test of the External Tank to follow early on launch day. If all goes well with the test, the countdown will continue to liftoff at 10:39 a.m. EDT on Tuesday.

I’ll have to tell Chuck I might be a little late on Tuesday morning. I can’t help but think of Bill Murray from Stripes: “Alright boys, just like last time… ONLY BETTER!”

Unclear on the concept

Technology, Work July 14th, 2005

It always scares me a little when I have to give grad students under networking professors special assistance getting on our networks. You’d think this is something they could figure out. The most recent case involved a student who couldn’t get online because s/he had given me their wireless MAC address for me to setup their wired connection. (They should have given me the address for their wired interface.) That’s pretty understandable mistake. With laptops having modems and bluetooth and firewire and everything else, all spitting out addresses when you run “ipconfig /all” it can be confusing. But if you’re here to work in a networking group, you should be respectful of those things.

Seven, seven firework shows

Education & Development, People & Places, Technology, Work July 5th, 2005

Even though I believe a rich life involves a little bit of doing things and a little bit of reflecting on them (blogging about them,) I’ve been more of a do-er than a report-er. There are many things I want to share with you, so buckle up – this might be a long one.

At work, we have a rediculously expensive clock system that uses GPS and FM signals to automatically set and synchronize the analog wall clocks in the conference, class, and lab rooms in the building. The carpenters installed most of the clocks last week, and, you guessed it, they aren’t working right. Some of them think we’re on mountain time, others are happy in central. I think I figured out why (with the help of the company’s 800# free tech support,) but it could take a while for the changes to make their way out to the clocks. If they aren’t all right tomorrow, I’ll walk around and reset them manually…. Exactly the thing we spent a crazy amount of money to avoid doing.

The rest of work is going well. I’m still making progress on my network transition plans for the summer. We’re rapidly approaching the diving board – enough talk, enough planning, enough trying to envision every side-effect. Just make the big changes and deal with the splash when you hit the water. I’m contemplating setting up a work blog (instead of categories in this blog,) but I wonder if that’s worth it. Certainly there’s a benefit to journaling my work experiences and learning, but to what degree? I might have to find that out. I could blog about my troubles with perl and my home directory, or the clocks, or the problems you encounter when Windows SFU can put files in place that traditional Windows file APIs cannot touch.

I’ve been trying to read more blogs, and I’ve thrown a few podcasts on the iPod. I still think a good 70% of things on blogs isn’t original – just someone linking to something else with their own little notes. That’s all well and good, but I want things that are interesting and new to me. (What did Tony’s kids learn this week?) The same old rehash, even worse when it’s audibly narrated to me, is annoying. Other than streaming new, unheard of music, or talk shows I’m actually interested in, I don’t see podcasting as being a big thing for me.

My LIS accounts are getting activated, and I’m able to browse their online webboard and resources. I’ve gotten 2-3 IT announcements from them in the week or so. I wonder if the LIS community has a different appreciation for IT than the CS community? I guess we’ll find out.

I was at home this weekend for the fourth, and we kept busy. Aaron and I went to Fair St. Louis on Saturday morning for the parade, food/beer, and airshow. Unfortunately, this airshow was all aerobatics and no military, so I didn’t get to see the big aircraft, or the perennial favorite Harrier. I also didn’t get a gyro or allegator, but I did enjoy corndogs with painted on mustard, ice cold Budweiser, fresh fried potato chips, a steak sandwich and a deep fried Oreo, which I guess is close enough.

On Sunday, Mom, bro and I drove down to the Lake of the Ozarks in Missouri. Mom had found an australian shepherd rescue on petfinder.com that she wanted to see, so we loaded into the Maxima (now with iTrip!) and met Lori, who became the next member of our family. She’s seven years old, and is as sharp as a tack and sweet as sugar cane. She’s a little flighty, as I would expect any transplanted dog in a new home to be, but she handled the car ride and rest of the weekend just fine, even with thunderstorms and fireworks! She has some new rules to learn, and we have some old habits of hers to break, but I think it’ll work out.

I don’t regret Lori, but adding a new pet 7 weeks after Winston left us sure pokes at a still sore wound. I think Aaron, Mom and I, each on our own terms, came to the realization this isn’t Winston – as much as we wanted her to be. None of us are fond of the Lori name, and it was all too easy (and bittersweet) to slip in a Winston…and then catch yourself, and maybe cry a little. Winston’s things came back down from the attic, unwrapped with the intention of being for Lori … and after being hugged, smelled, caressed and tear-stained, were quickly put back in their storage and will be put away again.

It’s not Lori’s fault; it’s cancer’s fault. If our Winney wasn’t taken by cancer, and Lori’s previous owner hadn’t been taken by cancer, our lives would be different. We’re all hurting, and we’ll all heal. Lori is fun and smart and beatiful. Once she lets us in, and we let her in, I’m sure we’ll find peace in the happiness we get from each other. Until then, it’s going to take some growth, and that’s not always easy, even when you want/need to do it. As I was packing up my car to leave, it was nice to glance back at the front door and see a dog staring at me through the storm window again. Sure, I’m a little sad it’s not Winston, but it’s hard not to smile at bright brown eyes and a wiggling dock, you know? Pictures will be on flickr later.

I left home at sundown on Monday, and drove by at least 7 firework shows by towns near I-70.