Connectivity Guide

RPVST allows (VLAN, port) based flush until the number of calls sent is equal to the MAC flush threshold value that is
configured.
When the number of calls sent exceeds the configured threshold, RPVST ignores further (VLAN, port) based flush and starts
the MAC flush timer. When the timer starts, the system blocks further flush. When the timer expires for that specific instance,
the system triggers VLAN-based flushing.
By default, the MAC flush threshold value is set to 5. However, Dell EMC recommends that you configure this value based on
the number of ports that participate in the STP topology.
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,
from 1 to 128.
Default Not configured
Command Mode EXEC
Usage
Information
Clear all STP counters on the device per the Ethernet interface or port-channel.
Example
OS10# clear spanning-tree counters interface port-channel 10
Supported
Releases
10.2.0E or later
clear spanning-tree detected-protocol
Forces the MST ports to renegotiate with neighbors.
Syntax
clear spanning-tree detected-protocol [interface {ethernet node/slot/
port[:subport] | port-channel number}]
Parameters
● interface — Enter the interface type:
○ ethernet node/slot/port[:subport] — Enter the Ethernet interface information, from 1
to 48.
○ port-channel number — Enter the port-channel number, from 1 to 128.
Default Not configured
Command Mode EXEC
Usage
Information
Use this command to force the RPVST+ port to re-negotiate with neighbors. If you use this command
without parameters, the command applies to each device port.
Example
OS10# clear spanning-tree detected-protocol interface ethernet 1/1/1
Supported
Release
10.2.0E or later
Layer 2 331