I am runnig MST (Multiple instance spanning tree) in my network. When I connect switch with Rapid STP at the edge of MST region, status of spanning tree on that link depends on the connected device.
MST REGION SWITCH <----> CATALYST 2960 with Rapid PVST then on MST switch can be seen P2P (boundary PVST+). As it should be.
MST REGION SWITCH <-----> LINKSYS SRW224P with Rapid STP then on MST switch can be seen P2P. Sometimes even P2P pre STD
It seems that Cisco recognize Linksys runnig IEEE Rapid STP as Internal (as if it runs MST).
Since Linksys runs IEEE Rapid STP, is there maybe some known issue when Cisco MST switch is connected to IEEE Rapid STP?
And just one question not related to the one above.
When MST region is connected to IEEE STP non-Cisco switch (which is properly detected on MST switch as p2p boundary STP), and when STP switch sends TCN into MST region, shouldn't that TCN BPDU inside of MST be proccessed only in MST0?
Because I can see in lab that all three, MST0, MST1 and MST2, are in toppology change state at a same time if some port goes up on IEEE STP switch.
Thank you and regards,