Administrator Guide

Example (Guard)
Dell#show spanning-tree pvst vlan 5 guard
Interface
Name Instance Sts Guard type
-----------------------------------
Te 0/1 5 INCON(Root) Rootguard
Te 0/2 5 FWD Loopguard
Te 0/3 5 EDS(Shut) Bpduguard
Related
Commands
spanning-tree pvst — configure PVST+ on an interface.
spanning-tree pvst
Configure a PVST+ interface with one of these settings: edge port with optional bridge port data unit (BPDU) guard, port disablement if
an error condition occurs, port priority or cost for a VLAN range, loop guard, or root guard.
C9000 Series
Syntax
spanning-tree pvst {edge-port [bpduguard [shutdown-on-violation]] | err-disable
| vlan vlan-range {cost number | priority value} | loopguard | rootguard}
Parameters
edge-port Enter the keywords edge-port to configure the interface as a PVST+ edge port.
bpduguard
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 keywords shutdown-on-violation to hardware disable an
interface when a BPDU is received and the port is disabled.
err-disable Enter the keywords err-disable to enable the port to be put into the error-disable
state (EDS) if an error condition occurs.
vlan vlan-range Enter the keyword vlan then the VLAN numbers. The range is from 1 to 4094.
cost number Enter the keyword cost then the port cost value. The range is from 1 to 200000.
Defaults:
• 10-Gigabit Ethernet interface = 2000.
• Port Channel interface with one 10 Gigabit Ethernet = 2000.
• Port Channel with two 10 Gigabit Ethernet = 1800.
priority value Enter the keyword priority then the Port priority value in increments of 16. The range
is from 0 to 240. The default is 128.
loopguard Enter the keyword loopguard to enable loop guard on a PVST+ port or port-channel
interface.
rootguard Enter the keyword rootguard to enable root guard on a PVST+ port or port-channel
interface.
Defaults Not configured.
Command Modes INTERFACE
Command History
This guide is platform-specific. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
Per-VLAN Spanning Tree Plus (PVST+) 1199