Madge Networks Token Ring Switch - Manual (Page 56)

56
Smart DeskStream Technical Presentation 56
n DeskStream DOES NOT participate in IBM
Spanning Tree negotiation
Spanning Tree
IBM Spanning Tree Support
1
2
Switch 1 sends IBM Spanning Tree BPDU
DeskStream forwards BPDU to all ports, including
other uplinks
Switch 2 receives BPDU, and appears as direct link
To prevent a loop, one backbone port will then
block
X
IBM BPDU
A DeskStream stack with only CRF ports doesn’t take part in any
bridging conversations - it acts in the same that a CAU would.