As 2011 comes to a close, I’d like to thank my incredible staff, my partners, clients and even our competitors for a great 2011. We have several initiatives, products and announcements that, I’m sure, will make 2012 a tremendous year. Congratulations to everyone who achieved their career goals in 2011, and good luck to everyone with a test date scheduled in 2012!

Happy New Year! – Wayne

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You still have a chance to save on your Cisco Certification training in 2011. We have some incredible offers on all of our self-study and instructor led training offerings! Now is the time to save.

You don’t want to miss out on these Year-End Promotions:

• CCIE Blended Learning Solution for only $999 (or on a 64GB iPad2 for only $1749)
• Register for any 2012 5 Day CCIE Bootcamp for only $1499
• Save $150 on CCNP to CCIE Transition Kits
• Get our New 5 Lab CCIE Preparation eBooks for only $125
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IPexpert would like to take this opportunity to once again congratulate all of our CCIE students that have accomplished a great feat this year. Pursuing a CCIE certification is a very difficult task, which requires long hours studying and labbing. It takes determination and commitment to succeed.  Enjoy your CCIE number!

Join us in congratulating the following CCIEs;

IPexpert is proud to boast the industry’s most complete and updated self-study portfolio for the CCIE Routing & Switching, CCIE Voice, CCIE Security, and CCIE Wireless Lab exams. Have you also used IPexpert or Proctor Labs to help you pass the CCIE lab exam? If so, we want to hear your story! Please email us at success@ipexpert.com.

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We have one seat left in the upcoming CCIE Security 5 Day Bootcamp and One Week Lab Experience Bootcamp.  In order to fill these last two seats on the following dates we are offering them for an unbeatable price of only $999. These seats will be filled on a first-come, first serve basis so don’t wait!

• CCIE Security 5 Day Bootcamp – January 9 – 13, 2012, San Jose CA
• CCIE Security One Week Lab Experience – January 16 -20, San Jose, CA

We also have a few seats open in the following CCIE R&S Bootcamps in RTP taught by CCIE Senior Instructor Marko Milivojevic available! Register today for only $1499 for the following courses:

• CCIE R&S 5 Day Bootcamp -  February 13 – 17, 2012, RTP, NC
• CCIE R&S One Week Lab Experience – February 20 -24, 2012, RTP, NC

Contact a Training Advisor Today

Email: sales@ipexpert.com
Phone: +1.810.326.1444
Live Chat: www.ipexpert.com/chat

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9 out of 10 network administrators agree – Rogue DHCP Servers suck! Stop them with this powerful, straightforward capability on Cisco Catalyst switches. This post assumes you understand the theory behind this security feature as taught in Cisco CCNP curriculums. Need a refresher – click right here.

Let us examine the configuration on a Cat 3560. First, enable the feature globally:

Cat4(config)#ip dhcp snooping

Next, configure the feature on the VLAN you are interested in protecting:

Cat2(config)#ip dhcp snooping vlan 10

In order to instruct the DHCP snooping feature that you have a legitimate DHCP server out of the Fa0/23 interface, mark the port as trusted:

Cat2(config)#int fa0/23
Cat2(config-if)#ip dhcp snooping trust

Verification? It could not be easier! How about:

Cat2#show ip dhcp snooping
Switch DHCP snooping is enabled
DHCP snooping is configured on following VLANs:
10
DHCP snooping is operational on following VLANs:
10
DHCP snooping is configured on the following L3 Interfaces:
Insertion of option 82 is enabled
circuit-id format: vlan-mod-port
remote-id format: MAC
Option 82 on untrusted port is not allowed
Verification of hwaddr field is enabled
Verification of giaddr field is enabled
DHCP snooping trust/rate is configured on the following Interfaces:
Interface                    Trusted     Rate limit (pps)
------------------------     -------     ----------------
FastEthernet0/23             yes         unlimited

Here we are ensuring that the feature is enabled, configured for the appropriate VLAN, and that the feature is operational on the correct VLAN. Finally, ensure the correct interface is trusted.

Are you called upon to do something outside the scope of this basic configuration in your lab exam? Well then it is time to hit the documentation on this feature. Follow this path to acquire it:

Cisco.com – Support – Switches – 3560 – Configuration Guides - Catalyst 3560 Software Configuration Guide, Release 12.2(58)SE – Configuring DHCP Features and IP Source Guard

Anthony Sequeira CCIE, CCSI
Twitter: @compsolv
Facebook: http://www.facebook.com/compsolv

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