To which destination MAC address are PVST+ BPDUs sent?

In PVST+ (Per VLAN Spanning Tree Plus), Bridge Protocol Data Units (BPDUs) are sent to the destination MAC address 0100.0ccc.cccd. This address is specifically reserved for Spanning Tree Protocol (STP) management, and it is used for sending BPDUs by devices participating in the spanning tree process.

When switches transmit BPDUs, they utilize this specific multicast address to ensure that all switches within the same VLAN can receive and interpret the information contained in those BPDUs. This is crucial for the operation of the spanning tree protocol, as it helps in preventing loops in a Layer 2 network by properly exchanging topology information among all switches.

Other addresses mentioned serve different purposes in networking. For example, 0180.c200.0000 is a reserved multicast address for various protocols in Ethernet, including those used for SNMP and RMON. The address 01ff.0000.0001 is not a valid multicast address and does not have a designated use in this context, while 02aa.0000.0002 is reserved but not directly utilized for PVST+ BPDU transmission. Understanding the significance of the correct MAC address helps in comprehending how VLANs and spanning tree