Vlan based spanning tree is nothign but PVST ( per vlan spanning tree) - cisco proprietary, or
MSTP (multiple spanning tree protocol) - 802.1s
PVST runns a spanning tree protocol instance for each vlan. Thus for each vlan, there is a set of root bridge, designated, root and blocked ports. Each vlan cvan have a different root bridge/ or different blocked link. A link blocked for 1 vlan can be made active for another vlan allowing, utilizing bandwidth optimally.
MSTP is similar to PVST but instead of running 1 spanning tree instance for each vlan, 1 instance is run for a group of vlans. So there can be multiple groups of vlans and for each group there is 1 instance again allowing utilization of links while maintaining redundancy.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...