Rapid Pvst+ Bpdus - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Cli software configuration guide

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Information About Rapid PVST+

Rapid PVST+ BPDUs

Rapid PVST+ and 802.1w use all six bits of the flag byte to add the role and state of the port that originates

the BPDU, and the proposal and agreement handshake. The following figure shows the use of the BPDU flags

in Rapid PVST+.

Figure 22: Rapid PVST+ Flag Byte in BPDU

Another important change is that the Rapid PVST+ BPDU is type 2, version 2, which makes it possible for

the switch to detect connected legacy (802.1D) bridges. The BPDU for 802.1D is version 0.

Cisco Nexus 5000 Series Switch CLI Software Configuration Guide

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