Archive for December, 2008

Dec
31

One of the things you have to really watch out for in life (and the CCENT exam) is ensuring that you are not sending CDP information to devices that you do not trust. The last thing you want to do is advertise to potential hackers of your network exactly what Cisco devices you are running and what Layer 3 addressing they possess.

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Dec
30

In an attempt to enhance the wireless security environment, especially in light of problems with Wireless Encryption Protection, SSID Cloaking and MAC Address Filtering were quickly implemented.
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Dec
28

Wireless certainly exploded onto the networking scene, unlike other technologies that took years to catch on. However, with wireless came huge challenges for securing the wireless network. After all, having potentially sensitive network data traveling through the air as radio waves immediately presented massive concerns.

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Dec
27

Many of my Boot Camp students ask me about exactly how they are going to be using the DOC-CD during the lab exam.  Specifically, they say “I have heard that I need to be a master at the DOC-CD in order to pass, but what exactly does that mean?”

I thought I would post a concrete example of how to use the DOC-CD during the lab exam for all to read.

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Dec
23

In this post we are going to speak mainly of NHRP. The other important part of DMVPN – IPsec – is relatively the same, and did not change with introduction of NHRP Phase 3. To begin with, let’s quickly recall the core features of NHRP Phase 1 & 2. For detailed overview, you may refer to DMVPN Explained

NHRP Phase 1:

No spoke-to-spoke tunnels but spokes dynamically register their NBMA addresses with the hub. Spokes use p2p tunnels and route all traffic across the hub. It is OK to summarize routes on the hub router and limit the amount of routing information received by the spokes.

NHRP Phase 2:

Uses a special CEF “trick” to implement spoke2spoke tunnels. All spokes need to receive full routing information with next-hop unchanged (e.g. using no next-hop-self eigrp or OSPF broadcast network type).

Look at the following topology:

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Dec
19

Sure, everyone knows that it is copy running-config startup-config in order to save your hard-earned configuration to the Non-volatile RAM (NVRAM) inside the device. But what about saving a copy of the configuration on your local PC? Well, this is easy thanks to a couple of tips and tricks, and the wonder of Notepad!

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Dec
17

What is a fun and effective study approach for many CCIE Lab Exam topics? Well try this out…

Step 1 – Find an Expanded Blueprint you can trust – hey, you can trust our blog!

Step 2 – Select a topic from that blueprint that you think you can fully explore within the timeframe you have set aside for studies. Perhaps you decide that you have 2 hours maximum for this particular study session. For this example, we will pick the RIP Version 2 Timers.

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Dec
15

Labs 1 and 10 of the new CCIE Routing & Switching Lab Workbook Volume 2 Version 5 (IEWB-RS) are now available on the members site.  All users with an active subscription to version 4.1 should automatically see the R&S Lab Workbook Volume II Version 5.0 Beta link when you login.  The lab meetup for lab 10 is scheduled for 9am Pacific time this Thursday.

Hope to see you there!

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Dec
12

The new CCIE R&S Lab Workbook Volume 2 Version 5 Lab 1 is now available.  Click here to download it.  Also the first of our new CCIE R&S Lab Meet-Up Series, starting today at 9:30am Pacific time, is open to all users.  Simply follow this link to join: http://ieclass.internetworkexpert.com/vol2v5lab1/ If you are planning on attending I would highly recommend printing out the lab and its diagram prior to us starting, as the majority of the class will be held on the command-line.

The schedule of following lab meet-ups will be posted shortly, as well as a projected timeline for the release of the rest of the volume 2 version 5 labs.

Hope to see you on class!

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Dec
09

This Friday the CCIE R&S Lab Meet-Up series kicks off with the new CCIE R&S Lab Workbook Volume 2 Version 5 Lab 1.  The new lab will be posted on the members site on Thursday, and the lab meet-up starts at 9am Pacific time.  The session should lab about 4 hours, depending on how many questions people have.  Essentially I will be configuring and explaining the lab live on the command line, and going through the logic of the solutions in detail.

It’s not too late to sign-up for the series, so contact our sales department if you have any questions.  I hope to see you there!

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