Configuring Spanning Tree - HP Blade bc1500 User Manual

Spanning Tree Protocol (STP) provides tree topography for any arrangement of bridges. STP
also provides a single path between end stations on a network, eliminating loops.
Loops occur when alternate routes exist between hosts. Loops in an extended network can cause
bridges to forward traffic indefinitely, resulting in increased traffic and reducing network
efficiency.
The device supports the following STP versions:
■
Classic STP — Provides a single path between end stations, avoiding and eliminating loops.
For more information on configuring Classic STP, see
page 2.
■
Rapid STP — Detects and uses network topologies that provide faster convergence of the
spanning tree, without creating forwarding loops. For more information on configuring
Rapid STP, see
■
Multiple STP — Provides various load balancing scenarios. For example, if port A is
blocked in one STP instance, the same port can be placed in the Forwarding State in another
STP instance. For more information on configuring Multiple STP, see
Spanning Tree" on page
The Switch also provides a parameter for configuring PVST/PVST+ Interoperability. When
this feature is enabled, the switch retransmits only BPDUs on the VLAN from which they
were received. Initial egress BPDUs transmit only on the VLAN to which the port is
assigned. This option enables the HP Blade PC Switch to simulate multiple STP/RSTP
bridges (VLAN unaware bridges), where the remote switch is communicating with either
STP or RSTP. When using the PVST Interoperability feature, each port reports only its
STP/RSTP bridge using standard IEEE STP/RSTP packets. Since each bridge is connected
by at least one port to the spanning tree, at least one port for each VLAN will be in the
forwarding state. The PVST Interoperability feature can only be enabled when each switch
port is an untagged member in only one VLAN, or when STP is disabled on the port. This
section contains the following topics:
■
Defining Classic Spanning Tree
■
Defining STP on Interfaces
■
Defining Rapid Spanning Tree
■
Defining Multiple Spanning Tree
Embedded Web System User Guide

Configuring Spanning Tree

"Defining Rapid Spanning Tree" on page
9.
www.hp.com
"Defining Classic Spanning Tree" on
7.
"Defining Multiple
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