Evil Routers

When CCIEs Get Bored

February 9, 2013

Now that Ryan Werber (“Scrye” on Freenode #cisco) has passed the CCIE exam and became #38168, he apparently has some extra free time on his hands. Update: This “Star Wars Traceroute” has been propagating (see what I did there?) like wildfire in the nerd-o-sphere since I first published this post. Since then, Ryan has originated [...]

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99 Problems But A Switch Ain’t One

November 2, 2012

Tom Hollingsworth laid down a nice little rap in the Day 1 Wrap-Up Video at Network Field Day 4, but it looks like he may have some competition — from inside Cisco, no less! From the video description: The group of new hires at cisco were told to make a parody music video for fun. [...]

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Y U NO MONITOR DATACENTER TEMPERATURE!?

October 18, 2012

In a previous life, I worked at a .edu and lived, roughly, across the street from the building that housed IT. I don’t recall what it was that caused me to go to work that Monday evening, the third day of a three-day (holiday) weekend, but as anyone who works in IT would likely agree, [...]

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Why Best Practices Are Important (or: How I Pwn’d The Shit Out Of My ISP)

September 28, 2012

Note: The events described herein took place many, many years ago (the statute of limitations has long since expired!), but the moral of the story remains the same. This topic came up on IRC a few nights ago and since a) several were interested in the story and b) I’m heading out to DerbyCon shortly, [...]

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Cisco Nexus 3548 Switch: 190 nanosecond latency

September 19, 2012

Hot on the heels of the new Arista Networks 7150S series top-of-rack switches that offer latencies as low as 350 nanoseconds, Cisco came out with an announcement of their own, shattering the land speed record in the process. The newest addition to the Nexus line of high-performance datacenter switches, the Cisco Nexus 3548 is a [...]

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Beer, Bikes, Boats, Babes, and Blogging

August 15, 2012

If you communicate with me via e-mail, IRC, or Twitter, you’d know that I haven’t really left. A question recently asked on the Evil Routers Facebook page, however, made me realize that I really need to start hanging out in the blogosphere again: Indeed, the last post here on Evil Routers, “IPv6 — It’s Not [...]

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IPv6 – It’s Not An Option

May 11, 2012

Those of you who know me in real life are probably quite aware of just how much of a dislike I have for sales and marketing people. That’s why whenever they make themselves look like idiots, I like to acknowledge it and recognize them for it. Besides, marketing folks tend to believe that any publicity [...]

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Cisco ASA: “read-only file system”

March 21, 2012

Recently, while upgrading a Cisco ASA that belongs to a customer and hasn’t been touched in a long time, the following took place: ciscoasa# copy tftp flash Address or name of remote host []? 10.10.10.42 Source filename []? asa842-k8.bin Destination filename [asa842-k8.bin]? Accessing tftp://10.10.10.42/asa842-k8.bin…!!!!!!!!!!!!!!!!!!!!!!! … Writing file disk0:/asa842-k8.bin… %Error opening disk0:/asa842-k8.bin (Read-only file system) ciscoasa# [...]

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How To Upgrade Cisco ASA Software And ASDM

February 15, 2012

After writing about how to upgrade a Cisco ASA license, I received a few messages asking about upgrading the Cisco ASA software. Fortunately, just like upgrading IOS on a Cisco router, it’s an easy, straightforward process that you can knock out in a few minutes. In this walkthrough, we’ll be upgrading the the ASA software [...]

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Wireless Field Day 2

January 17, 2012

I’ve been very fortunate to have been asked not once, but twice, to attend Net Field Day. As you probably already know, these are awesome events that bring together vendors with a handful of end users (who just happen to be bloggers). Over the weekend, I heard from “the man” Stephen Foskett, who asked if [...]

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