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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Cisco ISE 2.x: MAC Authentication Bypass (MAB)

MAC Authentication Bypass (MAB) is a method of network access authorization used for endpoints that cannot or are not configured to use 802.1x authentication.  MAB uses the hardware address (MAC address) of the device connecting to the network to authenticate onto the network. This hardware-based authentication happens when a device connects to a Network Access …

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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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