HP 6208M-SX, 6308M-SX manual Configuring Single-Instance Spanning Tree Protocol STP, HP9308#wr mem

■"Enabling or Disabling Spanning Tree Protocol (STP)" on page 8-31 in Book 1: Installation and Getting Started, that was shipped with your device

■Book 2: Advanced Configuration and Management (included on the Product Documentation CD-ROM shipped with your device):

•"Spanning Tree Protocol" on page 17-7

•"Enable Spanning Tree on a VLAN" on page 17-19

•"spanning-tree" on page B-153

Configuring Single-Instance Spanning Tree Protocol (STP)

Beginning with software release 05.2.14, you can configure either single-instance or multiple-instance spanning tree on the HP 9304M, 9308M, and 6308M-SX routing switches, and the HP 6208M-SX Switch. When single-instance STP is enabled, all VLANS on the device belong to the same spanning tree VLAN—with a shared STP VLAN ID of 4094. When multi-instance STP is used, each VLAN has a unique spanning tree ID.

To enable single-instance STP:

1.Enable single-instance STP globally.

2.Enable STP on each interface on which you want STP to operate.

•On the 9304M, 9308M, and 6308M-SX routing switches, you can enable STP on a per port or per VLAN basis.

•On the 6208M switch, enabling single-instance STP initially applies to all VLANs in the switch. You can use the no spanning tree command to disable STP on individual VLANs in the switch.

Example of Single-Instance STP Configuration: Beginning at the User EXEC level of the CLI, execute the following:

HP9308>enable
HP9308#configure terminal	Enables single-instance STP globally.
HP9308(config)#spanning-tree single
HP9308#wr mem	Saves the configuration change to memory.
	Single instance STP must be enabled for each VLAN that participates in the
	spanning-tree algorithm. The configuration file will show whether STP is enabled
	for a specific VLAN. In the following example, VLAN 100 is configured for STP
	(participating in the STP algorithm), while VLAN 101 is not.
HP9308(config)#vlan 100	Continuing from above, this command enables single-instance STP on VLAN 100.
HP9308(config-vlan-100)#span
HP9308(config)#wr mem	("100" is the <vlan ID>.)
	Saves the configuration change to memory.

After executing the above commands, the show config command will list the following VLAN/STP information:

ver 05.2.1x

!

span single

!

vlan 100 by port tagged ethe 3/1 to 3/2 span

!

vlan 101 by port tagged ethe 3/1 to 3/2 no span

Shows the software version number for the device.

Indicates single-instance STP is enabled on the device.

"span" indicates single-instance STP is configured on VLAN 100.

(Note: on the 6208M-XS switch, the word "span" does not appear, even though the device has been enabled for that VLAN.)

"no span" indicates that STP is not configured on VLAN 101.

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