Spanning-Tree Convergence

Spanning-tree convergence issues have been a challenge for network administrators to address. Depending on the size of the Layer 2 network, it can get very complicated. In fact, one of the big selling points of RSTP is its superior convergence capability over the legacy STP. Cisco switches provide numerous commands that can be used to tweak specific spanning-tree timers as introduced in Chapter 1, and discussed in more depth in this section. Cisco has also made available features such as BackboneFast and UplinkFast to help converge the Layer 2 network faster.

Spanning-Tree Timers

Spanning-tree convergence issues can be tricky. It is recommended that you keep things as simple as possible at Layer 2. Keeping timers at ...

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