flta1r12432 cross reference
You can check the digest on the Cisco switch with "show spanning-tree mst configuration digest", I guess there is also a command to show it available for the Dell. I'm not sure if this is really an issue in your scenario because the Dell has accepted the Cisco as the root bridge. []EDIT: WSS_Dell_PC6248#show spanning-tree mst-configuration. The problem isn't Cisco. HP and Dell (and other cheaper vendors) have a broken RSTP implementation. Running RSTP on HP with ANY other switches is a roll of the dice. ... If you run the "sh spanning-tree" commands on Cisco and whatever the HP comparative is, you ought to be able to track down the MAC addresses of the switches connected directly. Spanning Tree Protocol (STP) The Spanning Tree Protocol (STP) is a network protocolthat ensures a loop-free topology for any bridged Ethernet local area network.. History. STP is a Data Link Layer protocol. It is standardized as IEEE 802.1D. As the name suggests, it creates a spanning tree within a mesh network of connected layer-2 bridges (typically Ethernet.