Would you do such things to an ISR 819?

By On September 9, 2011 · Leave a Comment

Lucky there is a big disclaimer at the beginning of this video. Otherwise I would be tempted to test such things and then plug it in to see if it still start (at least) and run.

It’s a nice commercial from Cisco, but to be honest I feel bad for this poor device:

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Interface software loop

By On August 30, 2011 · 2 Comments

If you ever worked in an environment where you have to deal with leased / dedicated lines provider by your SP (service provider) then you know that whenever it’s a problem on the line they request, if possible, to put a loop on the line from one end toward the other end, so they can do some measurements. Usually from my experience with SP, this is a standard approach in case that they don’t know exactly what problem is with your line or where the [...]

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Cisco IOS release naming

By On July 11, 2011 · Leave a Comment

Most probably you already know this, but for those who are interested, here is a list of the letter definitions for Cisco IOS release trains. In more human terms, if you have loaded an IOS image like c2900-universalk9-mz.SPA.150-1.M5.bin, what those letters (in this case SPA) mean:

A = Aggregation/Access Server/Dial technology B = Broadband C = Core routers (11.1CA, 11.1CT, 11.1CC) D = xDSL technology E = Enterprise feature set F = Feature Specific enhancements (11.2F) G = Gigabit Switch Routers (GSR) H = SDH/SONET [...]

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Cisco QoS at-a-glance

By On July 8, 2011 · 1 Comment

Stephan, a  colleague of mine,  found the following documents digging through multiple pages of Cisco.com. The documents present a nice view of different QoS approaches and the most  important information. Somehow like “cheatsheets”. They were helpful to us when need to implement QoS in some parts of the network that we administer. I hope they will help you as well.

Maybe you are wondering why I’m adding them here, since the documents are already somewhere in Cisco.com. As probably you [...]

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ACS 5.1 integration with Active Directory [Part II]

By On May 5, 2011 · 12 Comments

In the first part of this article, I described a little bit the installation process for Microsoft Active Directory. Now it’s time to go ahead and talk about the ACS 5.x integration with AD. In the meantime I changed the version “5.1″ to “5.x” as version 5.2 is already out there. This tutorials work for both versions.

Maybe you are wondering why I don’t have a separate chapter about the installation process of ACS 5.x. The reason is that the [...]

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Cisco CCDA: 640-863 and 640-864

By On April 27, 2011 · Leave a Comment

As you probably know the CCDA exam 640-863 will be replaced by the newer version 640-864. The problem is not that Cisco is changing them (this is actually a good thing) but the fact that are too less materials regarding new exam and a lot of contradictory information.

First of all the official Cisco guide: CCDA 640-864 Official Cert Guide, 4th Edition is not yet available. Ciscopress.com announce it to be available June 10, 2011. [...]

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Cisco Secure ACS Unauthorized Password Change Vulnerability

By On April 19, 2011 · 1 Comment

I just finished testing a solution involving ACS 5.2 and Active Directory, when this “good news” hit me in face. It seems that ACS has a vulnerability that allow an unauthenticated attacker to change the password of any user account to any value without providing the account’s previous password.

You might think that this affects older version of the ACS, but in fact all recent versions are affected by this bug (CSCtl77440):

Vulnerable Products

The following Cisco Secure ACS versions are affected by this [...]

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The Essentials of CCNA Webinar

By On March 15, 2011 · 1 Comment

I just received an e-mail from Cisco about a free CCNA Webinar. It may be useful for those who want to become a CCNA or just want to know what is CCNA all about.

It’s one of the most recognized certifications in the IT industry today—now find out why so many networking professionals consider the Cisco CCNA® certification one of the most important stepping stones towards building a successful career in information technologies.

This informative, 90-minute webinar highlights the technologies and topics [...]

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Cisco Interactive Technology Workshop: Video Collaboration

By On February 28, 2011 · 2 Comments

Today, I’ve got an invitation from Cisco to attend their webcast regarding First Steps in Video Collaboration. I believe all of you out there who have a subscription to Cisco.com, got this invitation, but just in case you didn’t, here are the details.

Don’t ask me if this is just a marketing or real technical stuff, but as long as it is free I think it worth spending some time to check this webcast.

This session will help you understand how Cisco [...]

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Petition for Educational Cisco IOS emulator

By On February 27, 2011 · 2 Comments

The Cisco IOS Emulator Petition

We the undersigned ask Cisco to consider our petition for an open and usable IOS Emulator for learning, study and training.

We are the people who are learning about Data networking and Cisco IOS software. As students and practitioners, we need to learn theory and knowledge and then to take that knowledge and practice on Cisco IOS software.

We want to be able to practice that knowledge, and demonstrate our competence. We know that you are considering the [...]

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