Posts from ‘CCNA’

Sep
23

We have a new feature on our All Access Pass streaming video playlists that we believe will help tremendously help you in your studies – but we’ll leave you to be the judge of that. We have added the ability for you to save unlimited bookmarks (and take notes on those bookmarks) for each video playlist you have in your online, streaming All Access Pass. Please login to your members account, then navigate to one of the streaming video playlists in order to access the new bookmark feature (i.e. you won’t see it on the sample video playlists).

Here is a sample screenshot of the new feature in action. Click to see it larger.

By the way, one other important thing to note about this new feature is that if you take a bookmark, it is not specific to the streaming quality that you chose when saving the bookmark. So if you were watching in the “High” quality, and save a bookmark for a specific spot, you can always choose a different quality level (e.g. “HD”) and then click your bookmark, or vice-versa, to watch that bookmark at the different streaming quality. Also, you will be able to copy the links from those bookmarks, and send them to your peers studying with you, that also have an INE AAP membership, and they will be able to access that same spot to comment on something important that you found, and would like to share with them. You will find the appendix to the existing video URL very
similar to that of the way YouTube codes theirs, for easy use.

Enjoy, and be sure to tell us how you like the new feature and if or how it is helping you in your studies, in the comments section!

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Sep
01

A while back, in May, we asked you all what you thought of adding closed captioning to all of our videos, and your response – both in comments and private emails – was overwhelmingly positive. This functionality would not only provide better assistance for those with difficulty hearing, but also give everyone the incredible ability to search anywhere within any video for a particular topic or keyword that had been spoken about in the audio track, and immediately jump to that timecode spot in the video. This would every single minute of every video we have the ablility to be searched and subsequently accessed within just a few moments vs. having to watch the entire video over and over each time you wished to return to a particular spot in it for some remedial learning.

Well, you needn’t wait much longer.
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Jun
10

We’re pleased to announce that our recently released, highly acclaimed Routing and Switching CCIE Advanced Technologies Class is available for download. The RS ATC consists of 156 videos totaling over 80 hours of hands down the best CCIE training on the market today. You can download it now for just $299 or as an All Access Pass subscriber you can download it for only $149. For All Access Pass subscriber the online streaming version is included free of charge.

Each of the 156 videos can be individually downloaded without the need to download the whole class. This will enable you to selectively load them onto any computer or mobile device and watch them at your leisure. Although we do not place any DRM on the files themselves we do limit each purchase to two downloads. You can purchase an additional download for $29.95 in the future if needed under our Investment Protection Program.

Android customers should note that these are .mov files and you will need to download a player for them. We tested several freely available .mov players and didn’t run across any issues playing the downloaded videos. Additionally we’re going to upload a new version of the streaming videos next week to help with any compatibility issues regarding streaming to these devices. Update – June 11th 2100 GMT – All of the streaming videos are now working on Android enabled devices using the default browser.

If you’ve been wondering what we’ve been up to lately here at INE well you can now see that we’re once again changing the CCIE training industry. You can watch hundreds of hours of the best CCIE training for just $159 a month and download our newest courses for just $149 as an AAP subscriber.    We’ve just wrapped post-production on our brand new CCIE Voice ATC class and have made some sample videos available now and are releasing the full product next week.   This weekend you can pre-order the $299 downloadable version for $249 with the coupon code VATC50.

Also in the pipeline are completely redone CCNA, CCNA Voice and CCNA Security courses as well as CCNP Voice and CCNP Security courses.  All Access Pass subscribers will be able to stream them for free and download them for only $149.  These are scheduled for release in July.

 

Jan
08

One of the most important technical protocols on the planet is Open Shortest Path First (OSPF). This highly tunable and very scalable Interior Gateway Protocol (IGP) was designed as the replacement technology for the very problematic Routing Information Protocol (RIP). As such, it has become the IGP chosen by many corporate enterprises.

OSPF’s design, operation, implementation and maintenance can be extremely complex. The 3-Day INE bootcamp dedicated to this protocol will be the most in-depth coverage in the history of INE videos.

This course will be developed by Brian McGahan, and Petr Lapukhov. It will be delivered online in a Self-Paced format. The course will be available for purchase soon for $295.

Here is a preliminary outline:

Day 1 OSPF Operations

●      Dijkstra Algorithm

●      Neighbors and Adjacencies

○   OSPF Packet Formats

○   OSPF Authentication

○   Link-State information Flooding

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Jan
03

Continuing my review of titles from Petr’s excellent CCDE reading list for his upcoming LIVE and ONLINE CCDE Bootcamps, here are further notes to keep in mind regarding EIGRP.

About the Protocol

  • The algorithm used for this advanced Distance Vector protocol is the Diffusing Update Algorithm.
  • As we discussed at length in this post, the metric is based upon Bandwidth and Delay values.
  • For updates, EIGRP uses Update and Query packets that are sent to a multicast address.
  • Split horizon and DUAL form the basis of loop prevention for EIGRP.
  • EIGRP is a classless routing protocol that is capable of Variable Length Subnet Masking.
  • Automatic summarization is on by default, but summarization and filtering can be accomplished anywhere inside the network.

Neighbor Adjacencies

EIGRP forms “neighbor relationships” as a key part of its operation. Hello packets are used to help maintain the relationship. A hold time dictates the assumption that a neighbor is no longer accessible and causes the removal of topology information learned from that neighbor. This hold timer value is reset when any packet is received from the neighbor, not just a Hello packet.

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Dec
30

To start my reading from Petr’s excellent CCDE reading list for his upcoming LIVE and ONLINE CCDE Bootcamps, I decided to start with:
EIGRP for IP: Basic Operation and Configuration by Russ White and Alvaro Retana
I was able to grab an Amazon Kindle version for about $9, and EIGRP has always been one of my favorite protocols.
The text dives right in to none other than the composite metric of EIGRP and it brought a smile to my face as I thought about all of the misconceptions I had regarding this topic from early on in my Cisco studies. Let us review some key points regarding this metric and hopefully put some of your own misconceptions to rest.

  • While we are taught since CCNA days that the EIGRP metric consists of 5 possible components – BW, Delay, Load, Reliability, and MTU; we realize when we look at the actual formula for the metric computation, MTU is actually not part of the metric. Why have we been taught this then? Cisco indicates that MTU is used as a tie-breaker in a situation that might require it. To review the actual formula that is used to compute the metric, click here.
  • Notice from the formula that the K (constant values) impact which components of the metric are actually considered. By default K1 is set to 1 and K3 is set to 1 to ensure that Bandwidth and Delay are utilized in the calculation. If you wanted to make Bandwidth twice as significant in the calculation, you could set K1 to 2, as an example. The metric weights command is used for this manipulation. Note that it starts with a TOS parameter that should always be set to 0. Cisco never did fully implement this functionality.
  • The Bandwidth that effects the metric is taken from the bandwidth command used in interface configuration mode. Obviously, if you do not provide this value – the Cisco router will select a default based on the interface type.
  • The Delay value that effects the metric is taken from the delay command used in interface configuration mode. This value depends on the interface hardware type, e.g. it is lower for Ethernet but higher for Serial interfaces. Note how the Delay parameter allows you to influence EIGRP pathing decisions without the manipulation of the Bandwidth value. This is nice since other mechanisms could be relying heavily on the bandwidth setting, e.g. EIGRP bandwidth pacing or absolute QoS reservation values for CBWFQ.
  • The actual metric value for a prefix is derived from the SUM of the delay values in the path, and the LOWEST bandwidth value along the path. This is yet another reason to use more predictive Delay manipulations to change EIGRP path preference.

In the next post on the EIGRP metric, we will examine this at the actual command line, and discuss EIGRP load balancing options. Thanks for reading!

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Dec
01

Catalyst switch port security is so often recommended. This is because of a couple of important points:

  • There are many attacks that are simple to carry out at Layer 2
  • There tends to be a gross lack of security at Layer 2
  • Port Security can guard against so many different types of attacks such as MAC flooding, MAC spoofing, and rouge DHCP and APs, just to name a few

I find when it comes to port security, however, many students cannot seem to remember two main points:

  1. What in the world is Sticky Learning and how does it work?
  2. What is the difference between the different violation modes and how can I remember them?

Sticky Learning

Sticky learning is a convenient way to set static MAC address mappings for MAC addresses that you allow on your network. What you do is confirm that the correct devices are connected. You then turn on sticky learning and the port security feature itself, for example:

switchport port-security maximum 2
switchport port-security mac-address sticky
switchport port-security

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Oct
17

Well I finally did it!  After a year and half of studying practically every day I am happy to say I am CCIE #27143!  I am proud to say I failed the exam 4 times, I wear each one like a badge of honor.  And for $1,400 each, those badges are made of a rare gold/titanium/diamond composite material, they are beautiful.  My road to becoming a CCIE had many unexpected twists and turns.  I got my CCNA back in 2002.  I studied for 2 months and passed it on my 1st try, so I must be pretty darn good right?  Well in 2005 I decided to try for my CCNP.  I soon discovered I had let my CCNA expire, so I had to retake that first.  Within 6 months I passed the CCNA and all 4 CCNP tests, so I must be the man right?  Then I got my first real networking job and soon discovered that I was truly just a paper champion and had no clue how to design or configure anything.  I learned on the job and quickly got up to speed.

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Oct
17

For Part 2 of this series – click here.

WARNING: You must master subnetting using our course or some other trusted materials before you start using these shortcut approaches. It is a common issue for Cisco candidates to move directly to subnetting shortcuts for the exams without fully understanding exactly how subnetting functions.

ICND1 (CCENT)

Question 3: Your co-worker has decided upon use of the 172.16.0.0 address space for a section of your network. This section requires 15 subnets. What subnet mask will you recommend?

Step 1: I reference the Powers of Two chart I created on my scratch paper when I encountered the first question. The forumla for the number of subnets you can create based on subnet bits is 2^s. From the chart I see if we “borrow” 4 bits we can create 16 subnets.

2^7=128  |  2^6=64  |  2^5=32  |  2^4=16  |  2^3=8  |  2^2-=4 | 2  ^1=2  |  2^0=1

Step 2: Borrowing 4 bits beyond the Class B boundary results in 255.255.128+64+32+16 = 240. Our mask is 255.255.240.0.

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Oct
14

Click here for Part 1 of this series.

WARNING: You must master subnetting using our course or some other trusted materials before you start using these shortcut approaches. It is a common issue for Cisco candidates to move directly to subnetting shortcuts for the exams without fully understanding exactly how subnetting functions.

ICND1 (CCENT)

Question 2: You have run the ipconfig command and discovered your IP address and mask are 192.168.20.102 and 255.255.255.224. How many hosts are permitted on your subnet?

Step 1: I reference the Powers of Two chart I created on my scratch paper when I encountered the first question. Adding 128 + 64 + 32 = 224. There are 3 bits used for subnetting and that leaves 5 bits for hosts.

2^7=128  |  2^6=64  |  2^5=32  |  2^4=16  |  2^3=8  |  2^2-=4 | 2  ^1=2  |  2^0=1

Step 2: The equation for the number of hosts per subnet is 2^h – 2 where h is the number of host bits. From the chart I see that 2^5  = 32. 32-2 = 30 hosts per subnet! Too easy!

As always, let us know in the comments if you have a quicker approach.

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