Basic Cisco IPv6 EIGRP Configuration

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This was a random video I put together this morning. I was testing out some screen recording software for the future and figured I'd do something useful. This is a video walkthrough of a...

5.3.a (i) HSRP, GLBP, VRRP

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Overview In a business environment, there is something that is very valuable and a non-negotiable. That would be uptime. How do you achieve a great uptime? With redundancy. That is what this article will focus...

Quick Guide to Administrative Distance

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The textbook definition of “administrative distance” is simple enough: “the measurement of a protocol’s believability”. It’s not enough to know the definition, however you’ve got to know when AD comes into the picture and...

Asymmetric NAT rules matched for forward and reverse flows

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I was configuring a basic VPN configuration on my home Cisco ASA firewall so I could monitor a few things locally on my network while I was out with my iPhone. Being a Friday...

Cisco ASA 9.4 – Policy Based Routing

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It has finally happened: policy based routing is available for the Cisco ASA platform. This comes about from the new version 9.4 of the ASA software. While a lot of the time policy based...

Nat-Traversal (Nat-T) Clarification

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There was a recent lab I was working through where Nat-T was the main focus. Basically there was a firewall behind the internet router. It looked a little something like this, but sub our...

IP SLA and Cisco EEM

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There are a lot of networks that utilize redundant ISP connections for obvious reasons. The problem though, then a link goes down, there are times a route can remain in the routing table, this...