Reference Guide

Multiple Spanning Tree Protocol (MSTP) | 813
Parameters
Command Modes
INTERFACE
Command
History
Usage
Information
On an MSTP switch, a port configured as an edge port will immediately transition to the forwarding
state. Only ports connected to end-hosts should be configured as an edge port. Consider an edge port
similar to a port with spanning-tree portfast enabled.
If shutdown-on-violation is not enabled, BPDUs will still be sent to the RPM CPU.
tc-flush-standard
c e s z
Enable the MAC address flushing upon receiving every topology change notification.
Syntax
tc-flush-standard
To disable, use the no tc-flush-standard command.
Defaults
Disabled
Command Modes
CONFIGURATION
Command
History
Usage
Information
By default FTOS implements an optimized flush mechanism for MSTP. This helps in flushing the
MAC addresses only when necessary (and less often) allowing for faster convergence during topology
changes. However, if a standards-based flush mechanism is needed, this knob command can be turned
on to enable flushing MAC addresses upon receiving every topology change notification.
mstp
edge-port
Enter the keywords mstp followed by the keyword edge-port to configure the
interface as a Multiple Spanning Tree edge port.
bpduguard (OPTIONAL) Enter the keyword portfast to enable Portfast to move the interface into
forwarding mode immediately after the root fails.
Enter the keyword
bpduguard to disable the port when it receives a BPDU.
shutdown-on-
violation
(OPTIONAL) Enter the keyword shutdown-on-violation to hardware disable an
interface when a BPDU is received and the port is disabled.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.2.1.0 Introduced hardware shutdown-on-violation option
Version 7.6.1.0 Added support for S-Series
Version 7.5.1.0 Added support for C-Series
Version 6.1.1.0 Support for BPDU guard added
Version 8.3.11.1 Introduced on the Z9000.
Version 7.6.1.0 Added support for S-Series
Version 7.5.1.0 Added support for C-Series
Version 6.5.1.0 Introduced