CLI Guide

spanning-tree pvst
Congure 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.
Syntax
spanning-tree pvst {edge-port [bpduguard [shutdown-on-violation]] | bpdufilter]
| err-disable | vlan vlan-range {cost number | priority value} | rootguard}
Parameters
edge-port Enter the keywords edge-port to congure 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.
bpdulter (OPTIONAL) Enter the keyword bpdufilter to stop sending and receiving BPDUs on
port fast enabled ports.
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.
• Port Channel with two 40 Mbps Ethernet = 600.
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.
rootguard Enter the keyword rootguard to enable root guard on a PVST+ port or port-channel
interface.
Defaults Not congured.
Command Modes INTERFACE
Supported Modes Full—Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
The BPDU guard option prevents the port from participating in an active STP topology in case a BPDU appears on
a port unintentionally, or is miscongured, or is subject to a DOS attack. This option places the port into the Error
Per-VLAN Spanning Tree Plus (PVST+) 1043