Reference v4.1.0 Instruction Manual

Network OS Command Reference 567

53-1003115-01

protocol spanning-tree

Designates the context for spanning tree.

Synopsis protocol spanning-tree {mstp | rstp | stp | pvst | rpvst}

no protocol spanning-tree

Operands mstp Specifies the Multiple Spanning Tree Protocol (MSTP).

rstp Specifies the Rapid Spanning Tree (RSTP).

stp Specifies the Spanning Tree Protocol (STP).

pvst Specifies Per-VLAN Spanning Tree Protocol Plus (PVST+).

rpvst Specifies Rapid Per-VLAN Spanning Tree Protocol Plus (R-PVST+).

Defaults STP is not enabled. STP is not required in a loop-free topology.

Command Modes Global configuration mode

Description Use this command to create a context for the protocol specified.

Usage Guidelines Consider enabling STP to detect or avoid loops. You must turn off one form of STP before turning

on another form.

Packet drops or packet flooding may occur if you do not enable xSTP on all devices connected on

both sides of parallel links.

If xSTP is enabled over VCS, this command must be executed on all RBridge nodes.

Brocade Network OS v4.1.0 supports PVST+ and R-PVST+only. The PVST and R-PVST protocols are

proprietary to Cisco and are not supported.

Enter no protocol spanning-tree to delete the context and all the configurations defined within the

context or protocol for the interface.

Examples To enable the Spanning Tree Protocol:

switch(config)# protocol spanning-tree stp