We have 5 switch 3Com 3870 and 3 new 3Com (now hp) 4500G connected from first to last some by ethernet and others by fiber.
Now we want to connect last switch with the first one in order to give redundancy.
How do I configure the Spanning Tree on the 3870 and the 4500G?
Do I have to configure all switchs or only the last and the first?
What kind of configuration do I have to do?