I saw some previous topics regarding MSTP and PVSTP interaction but I still have some uncertainties.
Also I've read the "understanding MSTP article" from cisco's website.
my setup i:
c1 needs to be root for vlan 1-20
c2 root for rest of the vlans
switchport trunk enca dot1q
sw mode trunk
sw trunk allowed vlan 1,3,6
c2 mst config
instance 0 vlan 1,3,6
instance 1 vlan all except above
and when i enable the trunk i got error and link goes to blocking mode
%SPANTREE-2-PVSTSIM_FAIL: Blocking root port Gi0/24: Inconsitent inferior PVST BPDU received on VLAN 4, claiming root 24580:0022.55bb.1500
anything i am missing in my config ?
I understand that mst needs to be root bridge for all the rstp vlans but is there any alternative way around it ?