TSHOOT – Port Security, DHCP Snooping, IP Source Guard, DAI, Protected Ports, Private VLANs, and VACL Troubleshooting!

Above is a visual of Private VLANs and how they can communicate with each other, however this is going to be a lot of Switch security, so lets get to it. Port Security troubleshooting Some common issues that can cause Port Security not to work: Port Security is configured but not enabled - This is … Continue reading TSHOOT – Port Security, DHCP Snooping, IP Source Guard, DAI, Protected Ports, Private VLANs, and VACL Troubleshooting!

Dynamic ARP Inspection (DAI) – Fundamentals, configuration, ARP ACL config, Verification, and lots of details!

The above Topology perfect (sort of) why Dynamic ARP Inspection exists! Dynamic ARP Inspection exists to protect against the possibility of what can happen in the above Topology if Host B (Man in the Middle) gets a copy of an ARP request for a Data Server on the network, then sets its own IP Address … Continue reading Dynamic ARP Inspection (DAI) – Fundamentals, configuration, ARP ACL config, Verification, and lots of details!