MST and PVST

hi;
I have a qst about STP : what happen if we have a switch run PVST connected to an other switch that run MST

Comments

  • In this case the MST switch (if it's a Cisco switch) will perform what is called, "PVST Simulation". Essentially it will take the STP information from Instance-0 and place that into an 802.1d BPDU and send it to the PVST switch. If the two switches are connected via a VLAN Trunk, it will replicate that 802.1d BPDU (containing Instance-0 information) N-Times...once per every VLAN allowed on the trunk.

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