STP Guard


BPDU Guard

Prevents accidental connection of switching devices to PortFast-enabled ports. Connecting switches to PortFast-enabled ports can cause Layer 2 loops or topology changes.

Root Guard

Prevents switches connected on ports configured as access ports from becoming the root switch. The core switch, in a simple topology, should be the root.

Loop Guard

The Loop Guard STP feature improves the stability of Layer 2 networks by preventing bridging loops.


[Eric Leahy “The World of Networking”]

( Guard%3A Prevents accidental connection,devices to PortFast-enabled ports.&text=BPDU filtering%3A Restricts the switch,the root switch.)


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