Filter
Top Products
Installation and Getting Started Guide
• 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.
You can apply the following parameters on an individual port level.
• 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 switch or routing switch (when no VLANs are configured for the system). Ports are re-routed based
on their priority. The highest value is routed first. Possible values: 0 – 255. Default is 128. This value
overrides the system-wide STP priority.
• Path Cost – This parameter can be used to assign a higher or lower path cost to a port. This value can be
used to bias traffic toward or away from a certain path during periods of rerouting. For example, if you wish to
bias traffic away from a certain port, assign it a higher value than other ports within the VLAN or all other ports
(when VLANs are not active on the switch or routing switch). Possible values are 0 – 65,535 and the default
values are 1000/port speed for half-duplex ports and (1000/port speed)/2 for full-duplex ports.
Enabling Single STP
To enable single STP, use one of the following methods.
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 single STP. You need to enable single STP 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.
NOTE: If STP is disabled on a VLAN, you must enable STP on the VLAN before enabling single STP.
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
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.
NOTE: If the device has only one port-based VLAN, the CLI command for enabling single-instance STP 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 the STP priority and set the priority to 10 for port 1/1.
5 - 18