HP ProCurve 9304M Installation And Configuration Manual page 140

Installation and Basic Configuration Guide
ports or VLANs. If the selected path fails, STP searches for and then establishes an alternate path to prevent or
limit retransmission of data.
STP must be enabled at the system level to allow assignment of this capability on the VLAN level. STP is
disabled by default.
NOTE: The procedures in this chapter describe how to configure basic STP parameters. For more information
about STP, see "Configuring Spanning Tree Protocol (STP) and Advanced STP Features" on page 8-1.
USING THE CLI
To enable STP for all ports on an HP Routing Switch:
HP9300(config)# spanning tree
Syntax: [no] spanning-tree
USING THE WEB MANAGEMENT INTERFACE
1. Log on to the device using a valid user name and password for read-write access. The System configuration
panel is displayed.
2. Select Enable next to Spanning Tree.
NOTE: For information about the Single and Fast checkboxes, see "Single Spanning Tree (SSTP)" and
"Fast Uplink Span" in the Advanced Configuration and Management Guide .
3. Click Apply to save the changes to the device's running-config file.
4. Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change
to the startup-config file on the device's flash memory.
Modifying STP Bridge and Port Parameters
You can modify the following STP Parameters:
• Bridge parameters – forward delay, maximum age, hello time, and priority
• Port parameters – priority and path cost
STP Bridge Parameters
You can configure the following STP parameters:
• Forward Delay – The period of time a bridge will wait (the listen and learn period) before forwarding data
packets. Possible values: 4 – 30 seconds. Default is 15 .
• Maximum Age – The interval a bridge will wait for receipt of a hello packet before initiating a topology change.
Possible values: 6 – 40 seconds. Default is 20.
• Hello Time – The interval of time between each configuration BPDU sent by the root bridge. Possible values:
1 – 10 seconds. Default is 2.
• Priority – A parameter used to identify the root bridge in a network. The bridge with the lowest value has the
highest priority and is the root. Possible values: 0 – 65,535. Default is 32,768.
STP Port Parameters
Spanning Tree Protocol port parameters priority and path cost are preconfigured with default values. If the default
parameters meet your network requirements, no other action is required.
You can configure the following STP port parameters:
• Port Priority – This parameter can be used to assign a higher (or lower) priority to a port. In the event that
traffic is re-routed, this parameter gives the port forwarding preference over lower priority ports within a VLAN
or on the Routing Switch (when no VLANs are configured for the system). Ports are re-routed based on their
priority. A higher numerical value means a lower priority; thus, the highest priority is 0. Possible values: 0 –
255. Default is 128.
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