In this video clip from ICND2, Anthony Sequeira guides students through the various methods of routing between VLANs. The configuration of router on a stick is demonstrated.

Anthony Sequeira
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VIDEO SUMMARY:

In this bonus video for students, Anthony Sequeira walks CCNA students through a Site-to-Site VPN configuration using IPsec. Note that this configuration is not required for CCNA-level students, but is a glimpse at what a configuration and verification would be like. This video should make the subject more “real” for CCNA candidates. We hope you enjoy!

VIDEO RUNTIME:

20 minutes

NOTE: For best viewing, consider full-screen in HD on YouTube.

Another topic that we tabled in the CCIE Data Center Written bootcamp in order to cover it here is the built-in NX-OS Ethanalyzer. You are probably very familiar with the Wireshark packet capture and analysis tool. If not, it looks like this and is an extremely popular free tool for basic packet analysis:

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Overview

In one of our sessions on the Cisco Nexus in our CCIE Data Center Written Bootcamp here at IPexpert, we were able to dig into the SPAN and RSPAN features on these data center switches.

What then is ERSPAN? Well, first of all, please realize it is also on the blueprint, so we better study it.

Remember that SPAN and RSPAN mirrored traffic and carried this traffic with the Layer 2 domain of the switched infrastructure. Well, you probably already guessed what ERSPAN is about then – yes, it is about encapsulating remote switched port analyzer (ERSPAN) traffic so that we can route it through Layer 3 domains. How might we encapsulate this traffic for transport to the eventual destination port for analysis? Yes, you guessed it again – we can use the Generic Routing Encapsulation (GRE) for this purpose.
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One of the topics that will be so fun to tackle in Session 2 of the 8 session CCIE Data Center Written Exam Blueprint will be Virtual Device Contexts (VDCs) of the Cisco Nexus 7000 series. Sure, the device can do wonders with the preexisting virtualization technologies like VLANs at Layer 2 and VRFs at Layer 3, but the Cisco Nexus 7000 leaps beyond these capabilities to actually virtualize itself as shown in the diagram here.

The device actually presents its own physical self as multiple logical units – each fully independent (or real close!) of each other.

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