Category Archives: Design

Discussion about technology, network, and security design. Includes understanding what something is and how it fits into an overall solution.

Cisco WLC for Wired to Wireless mDNS and Bonjour

Bonjour and mDNS are discovery mechanisms that generally work effortlessly within a single VLAN. Those attempting to implement these protocols in a multi subnet environment often run into some significant challenges. The typical use of CAPWAP in an enterprise wireless … Continue reading

Posted in Design | Leave a comment

MPLS Intro Series – Route Reflectors

This is the final article in the MPLS Intro Series and will quickly mention the need for route reflectors. This need is driven by the iBGP requirement for a full mesh of peers. This means that a network with only … Continue reading

Posted in Design | Tagged | Comments Off on MPLS Intro Series – Route Reflectors

MPLS Intro Series – VPNv4 Packet Walk

In our last article, we configured and tested a basic VPNv4 configuration. In this article, we will do a hop by hop analysis of each device and look at a packet capture for a couple of the steps in the … Continue reading

Posted in Design | Tagged | Comments Off on MPLS Intro Series – VPNv4 Packet Walk

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

Posted in Design | Tagged | Comments Off on MPLS Intro Series – Introduction to VPNv4

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

Posted in Design | Tagged | Comments Off on MPLS Intro Series – Understanding a Simple LSP

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

Posted in Design | Tagged | Comments Off on MPLS Intro Series – Destination Routing