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Ahhh.... Nothing like that tiny new car smell


My last entry ended with how I was going to reboot my desktop because things were acting flaky. Well, I rebooted, and that's when the Badness started.

Things were now extraordinarily slow. And I could no longer see most of the network. That is, after looooong delays, I could see [some] things on my local network. But I couldn't get outside of my network at all. ifconfig showed lots of errors on the NIC.

So this started me on a huge search to see if I had somehow fried my NIC. I tried 4 different Linux kernels (each of which takes a while to comple, especially the modules), tried twiddling the parameters to my NIC, etc. This morning, I swapped out the NIC for a spare that I had lying around. No love. Great. Why didn't I do that last night?

So it's definitely a software problem. Then I looked closer at the default route.

It was wrong, by one digit.

When I replaced my DSL router/WAP, it came with a different default address than my old one, and I must have just manually changed the route last time and forgot to change the boot up default route. Arrggghh!!

After thinking about it, that totally explains the slowness -- Linux thought that networking was up, but instead of having all of its packets rejected by some remote server, since the incorrect router IP that I had in there did not exist, all packets would just get silently dropped. So the slowness was probably due to timeouts to all kinds of processes failing. I've seen network failures before, of course, but not like this -- usually it's pretty obvious when your default route is wrong because someone rejects the packets, and you get immediate denials. But I unfortunately picked on that didn't exist, and that led to timeouts, not denials.

Great. I wasted about 8 hours on this. Well, I'll remember this the next time it happens. Wisdom is not simply knowledge, it's knowledge + experience.

On the up side, I got an e-mail from the MoveableType folks (the blog-makers), and there's a new version out. There's a bunch of new features, one of which is the ability to have a plugin that has a lot of the features that I had back in the original JeffJournal (particularly with respect to entering in text that magically turns into HTML -- stuff like *hello* being automatically turned into hello). I've really missed those features, so I might try upgrading sometime soon...


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This page contains a single entry from the blog posted on February 14, 2003 8:04 AM.

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