STP – Root / Designated / Blocking Port selection process, illustrated for both equal and unequal STP Cost diagrams!

Consider the above Topology running STP with default settings, with 6 additional VLANs to the default Native VLAN 1, which links will be in what status by default?   Equal Cost link speeds in a default STP Port Selection process   First lets review the Root Port default election criteria once more: Port that receives … Continue reading STP – Root / Designated / Blocking Port selection process, illustrated for both equal and unequal STP Cost diagrams!

STP – Path cost info, identifying the Root Bridge, Root Cost vs Path Cost, and debugging STP port state transitions!

Most of this demonstration will be on the above Topology, except for the the output for changing Port cost, for that I'll just be using 2 Trunk links between SW1 and SW2.   STP Link Speed to Path Cost, and how to change Path cost on an interface   The link speed to STP cost … Continue reading STP – Path cost info, identifying the Root Bridge, Root Cost vs Path Cost, and debugging STP port state transitions!