In traditional STP, convergence was very slow because of the default Forward Delay and Max Age timers. In order to speed up convergence in 802.1D networks, administrators manually decreased the default timers, allowing for faster transition into the Forwarding state.
The rapid transition feature allows RSTP to place ports into a Forwarding state without having to rely on any timer configuration, such as that used in traditional STP. In order to achieve fast convergence on a port, the protocol relies upon two new variables: edge ports and the link type. Both are described in detail in the following sub . . .
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