Re: OER/PfR at lab exam?

Hi Brian,

Please also include me on the PFR document distribution list.

Thank you!
Adrian

On Wed, Apr 11, 2012 at 12:35 PM, Brian Dennis <bdennis_at_ine.com> wrote:

> Since PfR/OER is relatively new to the lab exam it's not covered as much
> as a topic like OSPF, MPLS VPNs, etc in most products. That being said I
> currently spend at least one full day covering it in my 10 Day R&S
> bootcamps and I cover it in-depth as getting 5 or 6 points on it in the lab
> exam can be the difference between passing or failing. I start from the
> basics (i.e. load balancing, PfR static & BGP route manipulation, etc ) and
> work into the more advanced configurations (i.e. link groups, fast mode,
> jitter probes, delay, PBR based upon DSCP, using PfR for sink holing
> traffic, etc).
>
> To be honest there are a ton of strange, for lack of a better term, quirks
> with PfR that can cause trouble when someone is just starting out learning
> PfR. So although it may seem like a good idea for me to just throwing you
> the labs from my bootcamp, that isn't going to be what you really need to
> truly understand it. It would be like saying to me "Hey Brian I want to
> learn MPLS VPNs" and I say "Here are a couple labs. Good luck!". Think
> that will work? No.
>
> Here is just a few example of quirks with PfR: An access-list used with a
> learn list can not match IP addresses but an access-list with a oer-map
> should match IP addresses. When using fast mode with a learn list you need
> to use a prefix list when also matching with an access-list. Or how to
> configure PfR to do PBR unconditionally without any OOP condition, etc,
> etc, etc.
>
> As I mentioned there are a lot of pitfalls with learning PfR due to the
> fact it's a newer technology and went through a lot of changes in IOS
> 12.4T. PfR is an awesome technology and I personally love it but it can be
> complicated to learn for anyone starting out. I would venture to say that
> is it one of the most complicated of any technology currently covered in
> the lab exam. The documentation is 33% bigger than the OSPF documentation
> and it's only getting larger with QoS being added and PfR domains in future
> releases.
>
> I started a blog series on it (http://goo.gl/yH0ip) but have since
> decided to just write a whole document covering PfR as the topic is just
> too big to cover in a few blog posts. I currently have over 100 pages and
> I'm hoping to release it around the end of the month. If anyone would like
> a copy, free of charge of course, just let me know.
>
> Lastly if anyone wants to come see me cover PfR in person free of charge
> just contact INE sales and ask to audit one day of my bootcamp. It's
> normally covered on the 8th day of my bootcamp. I'm in Dubai this week and
> covered PfR yesterday and have a private bootcamp next week but after that
> I'm teaching in Washington, DC and Seattle next so feel free to stop by.
>
> --
> Brian Dennis, CCIEx5 #2210 (R&S/ISP-Dial/Security/SP/**Voice)
> bdennis_at_ine.com
>
> Internetwork Expert, Inc.
> http://www.INE.com
>
>
> On 04/11/2012 02:35 AM, Ivan Hrvatska wrote:
>
>> Hi,
>>
>> I just purchased ciscopress ccie r&s exam cert guide 4th edition,
>> since I had 3rd in which there was nothing about OER and PfR. I must
>> say that the quality of that subject in new edition of the book is
>> really poor. One config example without any explanations and without
>> any topology diagrams. Nothing that can help someone to understand the
>> topic.
>> So, my question is how deep this subject goes in potential task at
>> exam? How much time should I spend on it since it can be very complex
>> feature? The book says:
>> "As you will see as you explore PfR more deeply, it is remarkably
>> powerful. As you would expect, it also has many configuration options.
>> For the CCIE R&S qualifying exam, you should understand the concepts
>> of PfR and how it operates and its core functionality."
>>
>> Thanks.
>>
>>
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Received on Tue Apr 17 2012 - 20:53:42 ART