5.3.a (i) HSRP, GLBP, VRRP

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...

BGP Best Path Selection: Origin

For the last few days I have been studying for my CCIE R&S lab and have been doing every practice lab I can get my hands on. The one thing they all seem to...

Two Methods of MPLS Interface Configuration within OSPF

Within all of the practice labs I have worked through for the CCIE Lab exam and in most real world applications I have seen, MPLS networks are run on top of (or within) an...

Quick Guide to Administrative Distance

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...

#RoutingTableLive – MPLS Lab

Decided to get at it early this morning since I booked my second CCIE RS attempt last night. This was a good MPLS lab with two VRFs (RED and BLUE). Two clients on each...

Cisco DMVPN Configuration Guide

DMVPN was next on my list to begin looking into for my CCIE exam so I decided to get a brief intro to the technology today as I sit here sick at with two...

Asymmetric NAT rules matched for forward and reverse flows

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...