Connectivity Guide
To fasten the spanning-tree state transitions, you can set the link type to point-to-point. To set the link type to point-to-point:
• Use the following command in INTERFACE mode.
spanning-tree link-type point-to-point
MAC ush optimization
OS10 oers a MAC address clearing technique that optimizes the number of MAC ush calls sent by the Spanning Tree Protocol (STP)
module. For more information about this feature, see MAC ush optimization.
RSTP allows per port-based ush until the number of calls sent is equal to the MAC ush threshold value that you have congured.
When the number of calls that are sent reaches the congured threshold, RSTP ignores further per-port based ush and starts the MAC
ush timer. When the timer expires, RSTP invokes an entire table ush, where it requests one ush for all the ports.
RSTP is single instance and hence MAC ush optimization is not required. However, to enable this feature, congure the MAC ush timer
to a non-zero value. This conguration is applied globally and applies for RSTP, MSTP, and RPVST. This conguration is retained when you
change the STP mode.
For RSTP, the threshold is set to a higher value (65,535) because RSTP does not require this optimization. Even when this feature is
enabled, the global ush is invoked only after the ush count reaches 65,535.
RSTP 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 congured
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
360 Layer 2