Release Notes

1917 | spanning-tree (Configuration Inter-
face)
Dell Networking W-Series ArubaOS 6.4.x| Reference Guide
Usage Guidelines
Dell supports global instances of RSTP and PVST+. Therefore, the ports on industry-standard routers/switches
must be on the default or untagged VLAN for interoperability with controllers.
ArubaOS supports RSTP on the following interfaces:
l FastEthernet IEEE 802.3—fastethernet
l Gigabitethernet IEEE 802.3—gigabitethernet
l Port Channel ID—port-channel
In addition to port state changes, RSTP introduces port roles for all the interfaces.
RSTP (802.1w)
Port Role
Description
Root The port that receives the best BPDU on a bridge.
Designated The port can send the best BPDU on the segment to which it is connected.
Alternate The port offers an alternate path, in the direction of root bridge, to that provided by
bridge’s root port.
Backup The port acts as a backup for the path provided by a designated port in the direction of
the spanning tree.
Example
The RSTP default values are adequate for most implementation. Use caution when making changes to the
spanning tree values.
(host) (config-if) #spanning-tree cost 345
(host) (config-if) #spanning-tree point-to-point ?
(host) (config-if) #spanning-tree portfast ?
(host) (config-if) #spanning-tree vlan range 2-8,11
Related Commands
spanning-tree (Global Configuration)
Command History
Release Modification
ArubaOS 6.0 Added support for PVST+ and VLAN and VLAN Range
ArubaOS 3.4 Upgraded STP to RSTP with full backward compatibility.
ArubaOS 1.0 Introduced the Spanning Tree Protocol (STP).