Reference Guide

Forward-time Amount of time required for an interface to transition from the Discarding to the Learning state or from the
Learning to the Forwarding state.
Hello-time Time interval within which the bridge sends BPDUs.
Max-age Length of time the bridge maintains conguration information before it refreshes information by recomputing the
RPVST+ topology.
• Modify the forward-time (in seconds) in CONFIGURATION mode (4 to 30, default 15).
spanning-tree vlan vlan-id forward-time seconds
• Modify the hello-time (in seconds) in CONFIGURATION mode (1 to 10, default 2). With large congurations (involving more number of
ports), Dell EMC recommends increasing the hello-time.
spanning-tree vlan vlan-id hello-time seconds
• Modify the max-age (in seconds) in CONFIGURATION mode (6 to 40, default 20).
spanning-tree vlan vlan-id max-age seconds
View RPVST+ global parameters
OS10# show spanning-tree active
Spanning tree enabled protocol rapid-pvst with force-version rstp
VLAN 1
Executing IEEE compatible Spanning Tree Protocol
Root ID Priority 32769, Address 90b1.1cf4.a523
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID Priority 32769, Address 90b1.1cf4.a523
We are the root of VLAN 1
Configured hello time 2, max age 20, forward delay 15
RPVST+ commands
clear spanning-tree counters
Clears the counters for STP.
Syntax
clear spanning-tree counters [interface {ethernet node/slot/port[:subport] |
port—channel number}}]
Parameters
• interface — Enter the interface type:
• ethernet node/slot/port[:subport] — Deletes the spanning-tree counters from a physical
port.
• port-channel number — Deletes the spanning-tree counters for a port-channel interface (1 to 128).
Default Not congured
Command Mode EXEC
Usage Information Clear all STP counters on the device per Ethernet interface or port-channel.
Example
OS10# clear spanning-tree counters interface port-channel 10
Supported Releases 10.2.0E or later
Layer 2 159