EXP Computer PathBuilder S200 - Manual (Page 27)

Bridging 23
T0008-16F Release 5.2M
Configuring the PathBuilder S200 Series Switch for Bridging Operation
Note
If STPE Control parameter is set to MAN, the following parameter appears.
Note
If STPE Control parameter is set to MAN, the following parameter appears.
*STPE Control
Range: AUTO, MAN
Default: MAN
Description: The Spanning Tree Protocol Entity (STPE) module in the Path-
Builder S200 series switch provides automatic calculation of the
spanning tree. Spanning tree allows for the proper support of single
route broadcast frames that occur in LANs. This parameter controls
how a bridge determines the Spanning Tree: either automatically
using the STPE, or manually using additional parameters in the
bridge link record.
• AUTO: The bridge participates in Spanning Tree Protocol
(STP) and automatically determines the single path between
LANs using the “Path Costs” assigned to the different links.
Bridge protocol data units (BPDUs) are special frames used to
continually communicate this information between bridges.
• MAN: The Spanning Tree is configured by the network
administrator. This is done using the STPE Link State
parameter found in the next section, “Bridge Link Parameters.”
Configure all bridges in your network to MANual if you are not an
expert user of Spanning Tree protocol operation. This prevents
problems in operation, especially when lower speed WAN links are
involved in forming bridges.
Bad Hello Threshold
Range: 10 to 30
Default: 15
Description: Use this parameter to generate alarms when some bridges are
configured AUTO and others are configured MAN in order to
detect nonmatching configurations.
A Bad Hello counter is incremented when a HELLO Protocol Data
Unit (PDU) is received while the STPE Control parameter is
configured to MAN. An event (alarm) is generated when the
counter exceeds the value of this parameter. The event is generated
only once during the Bad Hello Time.
Bad Hello Timeout
Range: 10 to 30
Default: 15