Tuesday, 13 December 2011

What are the Ports of Root Bridge called in Spanning tree Protocol?

This is really interesting question i came across, asked by my junior whom i was explaining the STP protocol.

It has not mentioned explicitly anywhere but  we can call them "designated ports" and definitely not "root ports".

As Root ports cannot exist on root bridge, only non -root bridges can have root ports.

Designated ports exist on the segment  that connect any switch to root bridge through the lowest cost . So through this port only the down link switch is getting connected to the root bridge.

Hope it is clear.

Keep Learning , Keep Sharing !!!

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