EXP Computer S200 manual Spanning Tree Protocol Entity Stpe, Key

Spanning Tree Protocol Entity (STPE)

Spanning Tree Protocol Entity (STPE)

Introduction	The Spanning Tree Protocol Entity (STPE) is part of the PathBuilder S200 series
	switch Source Route Bridge functionality. The parameters that control Spanning
	Tree Protocol operation are in the Bridge Record and Bridge Link Record. In the
	Bridge Record, the STPE Control parameter setting determines whether Automatic
	or Manual Spanning Tree is used.
	For detailed information about the parameters in the Bridge Record and in the Bridge
	Link Record, refer to the “Bridge Parameters” and “Bridge Link Parameters”
	sections earlier in this guide.
Automatic
	Automatic Spanning Tree is dynamic and involves more parameters that enable and
Spanning Tree	control the Spanning Tree Protocol messages that communicate between the bridges.
	By processing these messages, the bridges automatically determine a spanning tree
	for the network. These messages are continually updated so the spanning tree
	automatically adjusts to the current topology. These messages consume a small
	amount of the bandwidth. The automatic version is redundant since PathBuilder
	S200 series switch has the capability of re-autocalling the destination, thereby
	rerouting over another link.
Manual Spanning
	Manual Spanning Tree is static and cannot adjust to bridge network topology
Tree	changes. However, the process is more straightforward and does not consume
	network bandwidth (no Hello frames are used). The Spanning Tree is manually
	configured on a bridge link basis using the Bridge Link “STPE Link State”
	parameter (FORWARD/BLOCK).

What You Need to When you configure a node for bridging operation, the spanning tree parameters that

Configureappear on the Bridge Parameters Record and Bridge Link Record depend on whether you configure manual or automatic spanning tree.

Configuration	STPE Control= AUTO	STPE Control = MANUAL
Menu
Bridge Record	STPE Control = Auto	STPE Control = Manual
	Bridge Priority	Bad Hello Threshold
	Max Age	Bad Hello Count
	Hello Time
	Forward Delay
Bridge Link	STPE Priority	STPE Link State
Record	STPE Path Cost

Note

All bridges in a network must operate in the same mode, either all automatic or all manual.

Custom Software One Custom Software Key (CSK) enables both the Source Route Bridging and the

Key Spanning Tree Protocol Entity.

86 Bridging