HP 9304m Installation And Getting Started Manual page 181

Procurve routing switches
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Installation and Getting Started Guide
NOTE: If the device has only one port-based VLAN (the default VLAN), then the device is already running a
single instance of STP. In this case, you do not need to enable SSTP. You need to enable SSTP only if the device
contains more than one port-based VLAN and you want all the ports to be in the same STP broadcast domain.
USING THE CLI
To configure the HP device to run a single spanning tree, enter the following command at the global CONFIG level.
HP9300(config)# spanning-tree single
NOTE: If the device has only one port-based VLAN, the CLI command for enabling SSTP is not listed in the CLI.
The command is listed only if you have configured a port-based VLAN.
To change a global STP parameter, enter a command such as the following at the global CONFIG level:
HP9300(config) spanning-tree single priority 2
This command changes the STP priority for all ports to 2.
To change an STP parameter for a specific port, enter commands such as the following:
HP9300(config) spanning-tree single ethernet 1/1 priority 10
The commands shown above override the global setting for STP priority and set the priority to 10 for port 1/1.
Here is the syntax for the global STP parameters.
Syntax: [no] spanning-tree single [forward-delay <value>]
[hello-time <value>] | [maximum-age <time>] | [priority <value>]
Here is the syntax for the STP port parameters.
Syntax: [no] spanning-tree single [ethernet <portnum> path-cost <value> | priority <value>]
NOTE: Both commands listed above are entered at the global CONFIG level.
USING THE WEB MANAGEMENT INTERFACE
1.
Log on to the device using a valid user name and password for read-write access.
2.
Click the Single checkbox next to Spanning Tree to place a checkmark in the box.
3.
Make sure Enable, not Disable, is selected next to Spanning Tree.
4.
Click Apply to apply the change to the device's running-config.
5.
Select the Save link at the bottom of the panel. Select Yes when prompted to save the configuration change
to the startup-config file on the device's flash memory.
Displaying SSTP information
To display SSTP information, use either of the following methods.
USING THE CLI
To verify that SSTP is in effect, enter the following command at any level of the CLI:
HP9300(config)# show span
Syntax: show span [vlan <vlan-id>]
Here is an example of the information displayed by this command. Notice that the top of the display contains a
message stating that VLAN 2 is not in the SSTP domain. STP was disabled on this port-based VLAN when SSTP
was enabled. As a result, the ports in VLAN 2 were omitted from the SSTP domain. To add the VLAN to the
SSTP domain, enable STP on the VLAN.
Also notice that no VLAN IDs are listed in the VLAN ID column. For SSTP, all ports are members of VLAN 4094,
the SSTP VLAN. When you enable SSTP, all the ports in the single spanning tree, regardless of other VLAN
membership, are configured as members of port-based VLAN 4094. This VLAN is used to implement the single
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