Aaron's Worthless Words

Sign in Subscribe

Latest

SWITCH - Epic Fail

I did my standard 2ish-hour drive to the closest testing center today to take the SWTCH test (642-813). Utter failure. That’s 3 for those scoring at home. The test was the absolute worst I’ve ever taken. I know that I complain a lot, but this is totally justified

Stubby Post - Time-based ACLs and Policy-maps

Certain divisions of the company tend to shoot themselves in the foot by kicking off large file transfers during business hours, so I had a thought that maybe we could use time-based ACLs to do some QoSing for those guys. I fired up GNS3 with a 3600 running 12.4(

Stubby Post - UplinkFast

I’ve got a few switches daisy chained together with single links and have enabled UplinkFast on them. This switch is not the root bridge; F0/24 is the root port and F0/23 is a blocked alternate port. I’ve got debug spanning-tree uplinkfast on to help out. SW3#

Stubby Post - Path Cost of EtherChannels

I was doing some STP labs tonight and found something that caught me off guard a bit. I had been meddling with some EtherChannels between a pair of 3750s earlier today, and I forgot to reset the configs before starting on the STP stuff. One my secondary root switch, I

SWITCH – STP Exercise #1 Solution

Did you guys have any trouble with the solution to the STP exercise? Let’s work through it and see what happens. I got a few responses to the solution, and everyone seems to get the same answer, so I assume we’re all right. Before we get started, I

SWITCH - STP Exercise #1

Here’s an STP exercise for you. Given the bridge priorities, MAC addresses, and interface types in the diagram, calculate the root bridge, root ports, designated ports, and blocked ports. You can click on the image to enlarge it. I’ll post a solution in the next few days. As

A Quick Intro to Google's Capirca

Yeled left a comment earlier this week asking if I’d seen Google’s Capirca. I’d heard of it and checked out some presentation slides on it, but I’d never actually tried it out, so, in keeping with the script, I downloaded it to see what it could