This all refers to PVST+.
Does the vlan-ID actually get sent in the BPDU?
Let's say two switches connect and are configured as access ports, but the vlans differ (so A (accessport 20) connects to B (accessport 30)). How will the BPDU's behave in this situation? I know we'll get the CDP native vlan mismatch, but will switch B think the BPDU it received from switch A belongs to vlan 30 or will it do something else (ignore/err-disable/etc...)?
I guess the same question goes for a 802.1q trunk. Will the bpdu itself say which vlan it belongs to, or will the 802.1q header determine what vlan that BPDU is interpreted for?
I know mac-address reduction adds the vlan number as part of the priority, but I don't know if the vlan number is extrapolated from this or not.
Thanks so much for any and all help.