As far as the commands are concerned, it would depend on the version of IOS/CatOS that you are running on the switch. Refer to the Command reference of the appropriate version in the documentation given below.
Re: Redundant 4507R linking to 4506's on 4 floors - Spanning tre
Root path cost is the cumulative cost of all links to the root bridge. Considering that STP costs are incremented as BPDU's are received on a port, not as they are sent out a port, you could try increasing the port cost at the ingress ports on your 4506's to something higher than the default. For example, you want the link from the 2nd floor 4506 (G1/1) to the right 4507 to be the one forwarding traffic, and the link from the 2nd floor 4506 (G1/2) to the left 4507 to be in blocking mode. Increase the PVST cost of the 2nd floor port (G1/2) that uplinks to the left 4507 to something higher than the default:
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...