TSHOOT – Unicast Reverse Path Forwarding (uRPF), and VLAN Access-List (VACL) details reviewed for exam day!

A full understanding of the mechanics of uRPF (the different behaviors of the two modes especially), along with knowing the basic configuration and theory of how VACLs work, so when you are faced with tricky word play / config examples of either on a Cisco exam or while on the job troubleshooting a production network! … Continue reading TSHOOT – Unicast Reverse Path Forwarding (uRPF), and VLAN Access-List (VACL) details reviewed for exam day!

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!