Cisco ISE: Adding Network Devices

In ISE, switches are referred to as a Network Access Device (NAD).  Other NAD devices include wireless LAN controllers and VPN concentrators.  NADs are responsible for enforcing ISE policies on devices connecting to the network with MAB authentication via RADIUS, as well as authorization of remote device administration over SSH via TACACS+. Before a switch …

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SolarWinds Orion NPM: Configuring Cisco Hardware Health Pollers

While troubleshooting an issue with a 4506 switch recently, I discovered an interesting discrepancy: Orion was reporting a critical hardware issue on the switch, but the switch itself didn’t seem to have any idea that anything was wrong. The exact error I was seeing was that a supply voltage sensor for a fiber switchport interface …

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Wireshark Fundamentals: Setup and Configuration

Wireshark is an open-source tool which is used to perform packet capture and analysis for wired or wireless network traffic.  It can be intimidating to look at the first time you open a packet capture file (or pcap).  Hopefully this introduction will help smooth the sharp edges on learning this tool. I was first introduced …

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Setting Up GNS3, Part I: Initial Configuration

When I began looking at the world of Cisco certifications, I was overwhelmed by the sheer amount of material there was to learn.  Sure, I went at the CCENT with a baseline knowledge of networking gained from the CompTIA Network+ (and some associated concepts from the Security+), but not everything on the exam is listed …

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