Configuring IEEE 802.1w Rapid Spanning Tree Protocol

The IEEE 802.1w Rapid Spanning Tree Protocol can be enabled on a port-based VLAN or on an individual port, and IEEE 802.1w port and bridge parameters can be configured.
  1. Enter the global configuration mode.
    device# configure terminal
  2. Enable IEEE 802.1w on a port-based VLAN or on an individual port.
    device(config)# vlan 10
device(config-vlan-10)# spanning-tree 802-1w

    When configured on a port-based VLAN, changing the IEEE 802.1w state in a VLAN affects only that VLAN, including all the ports specified in the VLAN.

    The spanning-tree 802-1w or spanning-tree single 802-1w command must be used to initially enable IEEE 802.1w on ports. Both commands enable IEEE 802.1w on all ports that belong to the VLAN or to the single spanning tree.

    Note: When you enable or disable IEEE 802.1w within a port-based VLAN, the setting overrides the global setting. Thus, you can enable IEEE 802.1w for the ports within a port-based VLAN even when IEEE 802.1w is globally disabled, or disable the ports within a port-based VLAN when IEEE 802.1w is globally enabled. If you change the IEEE 802.1w state of the LAG virtual interface in a LAG, the change affects all ports in that LAG.
  3. Change IEEE 802.1w bridge parameters by using the max-age, hello-time, and priority keywords.
    device(config-vlan-10)# spanning-tree 802-1w priority 0 hello-time 3 max-age 10
    The changes are applied to individual ports on the bridge. If you have configured a port-based VLAN on the device, you can configure the parameters only at the configuration level for individual VLANs.
  4. Change IEEE 802.1w port parameters by using the path-cost and priority keywords.
    device(config-vlan-10)# spanning-tree 802-1w ethernet 1/1/1 path-cost 15 priority 64

The following example shows how to enable IEEE 802.1w RSTP on a port-based VLAN, VLAN-10. Bridge and port parameters are configured.

device# configure terminal
device(config)# vlan 10
device(config-vlan-10)# spanning-tree 802-1w
device(config-vlan-10)# spanning-tree 802-1w priority 0 hello-time 3 max-age 10
device(config-vlan-10)# spanning-tree 802-1w ethernet 1/1/1 path-cost 15 priority 64

The following example shows how to enable IEEE 802.1w RSTP port parameters on an individual port, Ethernet 1/1/1, and LAG 45, respectively.

device# configure terminal
device(config)# interface ethernet 1/1/1
device(config-if-e1000-1/1/1)#spanning-tree 802-1w admin-edge-port
device# configure terminal
device(config)# interface lag 45
device(config-lag-if-lg45)# spanning-tree 802-1w admin-pt2pt-mac enable

In this section:

  1. Note Regarding Pasting IEEE 802.1w Settings into the Running Configuration
Parent topic: RSTP Parameter Configuration