Chattering random observations, tips, and tutorials on all things related to IT.
Me: Damn, I can’t seem to get a DHCP address!
I’ve been having all sorts of weirdness with DHCP the last few days. Been working on some automation magic, and I can’t seem to get an address.
So I crawl under the desk at my client to see where my cables go:
Crazy. That’s all I can say. CRAZZZZZY. Some previous consultant for some weird reason, had 2 switches plugged into each other and when I began working on this additional server I created a loop.
The Takeaway?
If your going to have some crazy dumb switch hooked up to many switches, make sure you A.) don’t do that B.) if you do do this, turn off spanning-tree port fast. I’m sure some of you have see this message before…Listen to it!
router> Warning: portfast should only be enabled on ports connected to a single
host. Connecting hubs, concentrators, switches, bridges, etc... to this
interface when portfast is enabled, can cause temporary bridging loops.
Use with CAUTION
