Users Guide

Table Of Contents
Configure a Spanning Tree Protocol
Dell EMC Networking recommends configuring one of the supported spanning tree protocols (MSTP, RSTP, or RPVST+) on both VLT
peers.
Use a spanning tree protocol for initial loop prevention during the VLT startup phase and for orphan ports. Configure the spanning tree
protocol in the network before you configure VLT on peer switches.
NOTE:
RPVST+ is enabled by default.
RPVST+ configuration
Configure RPVST+ on both the VLT peers. This creates an RPVST+ instance for every VLAN configured in the system. With RPVST+
configured on both VLT nodes, OS10 supports a maximum of 60 VLANs. The RPVST+ instances in the primary VLT peer control the VLT
port channels on both the primary and secondary peers.
NOTE:
RPVST+ is the default STP mode running on the switch. Use the following command only if you have another
variant of the STP running on the switch.
Enable RPVST+ on each peer node in CONFIGURATION mode.
spanning-tree mode rapid-pvst
Configure RPVST+ — peer 1
OS10(config)# spanning-tree mode rapid-pvst
Configure RPVST+ — peer 2
OS10(config)# spanning-tree mode rapid-pvst
View RPVST+ information on VLTi
OS10# show spanning-tree virtual-interface
Virtual Link Trunking
1175