Review of the year 2012

So its now the last day of the year 2012 and I think its time to have a little review of the year and some thoughts about the coming year.

2012 for myself was a year with a lot of changes and interesting challenges. After the move from Switzerland to Germany (which is something that most people think its crazy cause normally its the other way around) I had to start at a new company in a new country  with a totally new field of work. Its quite a difference to work for a company which is not creating any revenue with what you do (I call it internal IT) compared to a company which makes revenue out of your work. But after a year I can say, that this was the right decision to make I love my job (99% of the time, but hey nothing is perfect ;)) and the company is great. I do get a lot of support and opportunities to grow from the company and my colleagues, and this wont stop in 2013. I did start with a clear technical focus (hey Im a geek, put me into the cellar and give me some light and a computer with internet access and Im fine ;)) but it somehow shifted now during the last year. Im now doing more (technical) consulting than pure technical stuff, I even got the opportunity to develop a method to analyse the infrastructure of customers regarding their IPv6 readiness and show them a possible way to get selected services IPv6 enabled.

The probably most interesting thing is the shift of thinking, instead of thinking about systems/devices and how they connect together (aka the Network) the focus relies now on services which use the network as the underlaying system which is also another interesting point of view.

2013 will get me more into this direction since we are going to increase our consulting services and some colleagues and me are selected to develop those offers.


2012 was also a real calm year in terms of my blog, this post is only the second post for 2012! Not much I know but time and mood didn’t permit to write more 😉 I did also think about the future of this blog and what I should do with it. The conclusion out of this is to change the focus of this blog, in the past the blog was pure technical related. Trying to explain protocols and other stuff to the community, but It always took me (dunno how this is for others) a long time to write an article, check it for technical errors (you can keep grammar and spelling errors if you find them ;)). There are a lot of other blogs around which are explaining this and a lot of them are probably doing it even better than I can, I decided to write more about things I stumble upon during my projects or other things I think they might be worth sharing. Ill leave the technical explanations to people that actually do it better 🙂


Maybe one last thing. I sometimes get comments or mails from people asking me to help them with their CCIE studies. I am not going to give advice nor help, guys there are a lot of companies, blogs and mailing lists around for those things which have more actual information (hey I did pass the lab in 2008, guess how many times the lab did change during this time…). And something you really should add to your skills is to do your own research before asking to be spoon feed with information. A teacher once told me:


You don’t have to know everything, you just have to know where to find it


No one (maybe with some small exceptions) is able to know everything and if you are like 99.999% of mankind you should really make yourself comfortable with doing research by yourself, this skill will help you a lot in life (no matter if its at work or in your private life).

Ok enough of useless writings, I wish you all a happy new year and may 2013 bring you what you are looking for.


Busy time

Hi there

Its some time ago now since I did write the last post. Its not that I dont want to write, but my life did change quite a lot over the last 2-3 month.

I did decide to move from Switzerland to Germany last year in november and start at a new company here. Since december last year I do work as a Network Design Engineer at Dimension Data, one of the biggest Cisco partners in Germany. It feels now that Im on the right place to work, I do work a lot more with different technologies, protocols, boxes or whatever than before, can use my knowledge and learn a lot of new stuff or get deeper into something I did once years ago and there is still a lot of space to grow.

I also still got my flat back home until the end of the month (still in the movement process) and quite a lot of work did not really help to get time or the mood to write something 😉 I hope to find more time in the future to get up with with writing articles again 🙂

Interesting Links

Probably a category which is found in a lot of blogs, but the more I think about it, the more I like this kind of post. My google reader blog list grows and grows and there are those posts I’d like to save somewhere, so I could either make myself a (some when) blown up link list or why not share it with others, and create a category on my blog for it, so I got a full searchable link archive?

I don’t know yet how often I will post such an article, so lets see how it will evolve 🙂

IPExperts Cisco’s STP Toolkit

Overview about the STP Enhancements from Cisco

Cisco was not going to sit and wait around for the standards bodies to enhance Spanning-Tree Protocol so that it would converge faster and be more safe to implement. Instead, Cisco has been hard at work creating tools that could improve the protocol. Here is some review about these various tools.

Continue reading

Cisco UCS Emulator

I’m somewhat excited to get (somehow) more into Data Center Networking, mostly cause it changed quite a lot in the past few years and there is a lot (at least for me) new stuff to get into, like the Nexus switches or the Cisco UCS. It would be awesome to get my hands on a real nice lab for this and even though the company I work for, does have some UCS chassis and 5k/2k Nexus switches, they are somehow hard cabled and Im not really able to do what I would like to do (delete everything and build it up from the ground). There is a UCS Emulator from Cisco which at least lets me play around with the basic stuff and learn how it works. Not perfect, but its a beginning 😀

The Emulator can be downloaded from the Cisco Developer Community, you’ll need a User Login to download the Emulator

To be able to run the Emulator, you’ll need a VM Player, JDK 1.6 (or higher) and the 7-Zip unzip program. The Cisco UCSPE v1.4 release notes are good starting point on how to get the Emulator up and running.

I got the Emulator up and running on my MacBook Pro with VMware Fusion and am looking forward now to play around with it 🙂


Have fun 🙂

Future of CCIE Voice, Data Center and Overall CCIE Program

Today I found an interesting article in  my google reader about the CCIE Program and its future from INE. They did talk with Yusuf Bhaiji (CCIE Program Manager) and  Ben Ng (CCIE Voice Track Program Manager) at the Cisco Live 2011 in Las Vegas about the following points:

  • Upcoming changes to every CCIE Lab Exam
    • Protecting the integrity of the CCIE certification
    • Robust, matured results-based grading engine
    • Heuristic logic embedded into task wording
    • Accuracy and detail of lab score reports
    • Cisco’s CCIE Lab Delivery System and virtualization for mobile labs
    • No re-reads
  • CCIE Voice
    • Next blueprint version expectation
    • Topics for current and next blueprint versions
  • CCIE Data Center
    • CCIE Storage grows up
  • Reason behind CCIE Statistics web page being removed

Have fun: ‘Cisco Live! 2011’ – Future of CCIE Voice, Data Center and Overall CCIE Program

Matching Address Classes with Prefix-Lists (Followup)

This article is a follow up on the Matching Address Classes with Prefix-Lists based on the comments from killerkadoogan. I think its easier to answer the comments this way, I hope you don’t mind 🙂

Hi Pashtuk,

Under the technical definition of a CLASS C network, IE using classes. is NOT a class C network. So ‘Class C: le 32′ would also block or allow that ‘supernet’ of Class C’s, which isn’t a Class C in itself. Old-school routers (ie RIPv1) would convert the mask to /24,Class C is technically:
bits 1-3 110 + a 24 bit mask.


check out“in class c, the high order three bits are one-one-zero, the next 21 bits are the network and the last 8 bits are the local address.”so the technically correct Class C prefix list is: ge 24 le 24

you wouldn’t use that in the real world though ;)

You are right if we are talking about the old “classical” concept of Address Classes with their definition of the subnet mask.

Nonetheless the classical concept does not really matter much anymore nowadays, even though the terms Class A/B/C are still in use. Most of the time if we talk about a Class C network today a /24 subnet is thought off, no matter to which original Class the subnet belongs too.

On another occasion we can also talk about Classes in the meaning of ranges grouped into those defined classes (as used in the article).  In that case, it doesn’t matter what the typical subnet mask was, it only matters that we are able to match every subnet out of that range no matter which mask it got.

It does not have much to do with a real world approach, as a lot of the CCIE stuff I had to learn, but it belongs into the stuff a person has to know for the CCIE lab.

Cisco Press Book Giveaway – July 2011

Once more, Steve (owner of the Networking-Forum) and Cisco Press do have a free Giveaway. Check it out and good luck with the drawing 🙂

What’s going on? in association with Cisco Press is giving away 5 free copies of IPv6 for Enterprise Networks.

This is a monthly event so check back next month if you already have the book above.

How are the winners chosen?

It’s simple, add yourself to the forum’s ‘Cisco Press Book Giveaway’ group. Yep, that’s it.

1) Go to your User Control Panel
2) Select the ‘Usergroups’ option on the left
3) Select the ‘Cisco Press Book Giveaway’ radio button
4) Make sure the drop-down menu says ‘Join selected’ and hit the ‘Submit’ button

You should receive an email confirming that you’ve been added. Or you can view the members of the group to ensure your username is on the list.

Towards the end of the month, the forum staff will close the group and randomly select the winners. The winners will be announced in this thread and they will have a few days to provide their shipping information.

Other details

  • Neither (Amoeba Solutions LLC) nor Cisco Press is responsible for issues with this giveaway.
  • There will be mistakes made. Don’t get mad or sue. Simply enter next month’s giveaway.
  • The rules and or details may change at any time.


Any news/updates/changes will be posted here.