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You are here: Home / SWITCH / Module 4 / Advanced STP – 802.1D and 802.1w Interoperability

Advanced STP – 802.1D and 802.1w Interoperability

RSTP is an IEEE standard and is therefore able to interoperate with traditional STP. However, it is important to realize that RSTP loses its ability to provide sub-second re-convergence when implemented in a network that also contains switches that are only 802.1D capable. This section describes the interaction of these two IEEE standards.

By default, 802.1D switches drop 802.1w BPDUs. This essentially means that in mixed 802.1D and 802.1w switched networks, 802.1D switches inevitably always end up initially sending BPDUs. In Figure 4-14 below, two switches, Switch 1 and Switch 2 . . .

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