RSTP with VLAN .. How does it work?

SwOS
1

I have a CSS610 switch that I believe only supports RSTP (being a limitation with SwOS).
It has multiple VLANs setup and I have the same VLANs setup on all of my other switches as well:
RSTP_Network.JPG
I am wondering:

  • Is RSTP aware of VLANs? My understanding that I should be using MSTP with VLANS?


  • I believe I can only have a single root bridge with RSTP. Is it possible to have “per VLAN” RSTP where VLAN10 goes via EdgeSwitch.. and VLAN30 goes via CRS309 (as root bridge)?
2

RSTP knows nothing of VLANs. If you have the same untagged and tagged VLANs on all the non-edge links using RSTP is fine, it will block all traffic on one of the links to prevent a loop.

If you wish to have the block in different places around the loop for differing groups of VLANs you need MSTP.