Command Line Reference Guide

912 | Multiple Spanning Tree Protocol (MSTP)
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Defaults
cost = depends on the interface type; priority = 128
Command Modes
INTERFACE
Command
History
spanning-tree mstp edge-port
c e s
Configures the interface as an Multiple Spanning Tree edge port and optionally a Bridge Protocol Data
Unit (BPDU) guard.
Syntax
spanning-tree mstp edge-port [bpduguard [shutdown-on-violation]]
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.
priority
priority Enter keyword priority followed by a value in increments of 16 as the priority.
Range: 0 to 240.
Default: 128
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 on E-Series
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 8.2.1.0 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