Author Archives: Paul Stewart, CCIE 26009 (Security)

About Paul Stewart, CCIE 26009 (Security)

Paul is a Network and Security Engineer, Trainer and Blogger who enjoys understanding how things really work. With over 15 years of experience in the technology industry, Paul has helped many organizations build, maintain and secure their networks and systems.

MPLS Intro Series – Introduction to VPNv4

In the previous article, we took a look at building a simple label switched path (LSP) through an MPLS network. This article takes the configuration a step further and leverages multiple labels to connect and isolate VRFs over an MPLS … Continue reading

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MPLS Intro Series – Understanding a Simple LSP

In the previous article, we created an interesting situation with an iBGP configuration.  In that example, we made Edge2 aware of a route via BGP that the intermediary hops would not see. In this article, we will fix this problem … Continue reading

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MPLS Intro Series – Destination Routing

Yes, we are going to talk about destination routing. I know it sounds boring and archaic, and it is. But it is also necessary to contrast against another topic that I intend to introduce. As I scour PacketU, I see … Continue reading

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MPLS Intro Series – Customer Connection with BGP

In the last article, we performed a packet walk of a simple VPNv4 network. This article will expand our deployment by allowing the CE_Sites to advertise their own routes via BGP. For this configuration, we will use some overlapping and … Continue reading

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Redirecting DNS Requests to Umbrella with ASA

As networks begin leveraging intelligent DNS products, there is often a need to do some magic at the Internet edge to redirect to the target provider. Some products actually have this capability embedded. Even though the ASA doesn’t specifically have … Continue reading

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Comments on Vendor Optics – Listen Here

I recently listened to Packet Pushers show 395 recently. It is a great discussion on optical networking. One thing I wanted to make everyone aware of was a series of comments on the varying quality of optics and some justification around … Continue reading

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