CLI Guide
Disable state if a BPDU appears, and a message is logged so that the administrator can take corrective action.
When BPDU guard and BPDU lter is enabled on the port, then BPDU lter takes the highest precedence.
NOTE: A port congured as an edge port, on a PVST switch, will immediately transition to the
forwarding state. Only ports connected to end-hosts should be congured as an edge port. Consider an
edge port similar to a port with a spanning-tree portfast enabled.
Example
Dell(conf-if-te-0/1)#spanning-tree pvst vlan 3 cost 18000
Dell(conf-if-te-0/1)#end
Dell(conf-if-te-0/1)#show config
!
interface TenGigabitEthernet 0/1
no ip address
switchport
spanning-tree pvst vlan 3 cost 18000
no shutdown
Dell(conf-if-te-0/1)#end
Dell#
Related Commands
show spanning-tree pvst — views the PVST+ conguration.
spanning-tree pvst err-disable
Place ports in an Err-Disabled state if they receive a PVST+ BPDU when they are members an untagged VLAN.
Syntax
spanning-tree pvst err-disable cause invalid-pvst-bpdu
Defaults Enabled; ports are placed in the Err-Disabled state if they receive a PVST+ BPDU when they are members of an
untagged VLAN.
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
Some non-Dell Networking systems which have hybrid ports participating in PVST+ transmit two kinds of BPDUs:
an 802.1D BPDU and an untagged PVST+ BPDU.
Dell Networking systems do not expect PVST+ BPDU on an untagged port. If this happens, the system places the
port in the Error-Disable state. This behavior might result in the network not converging. To prevent the system
from executing this action, use the no spanning-tree pvst err-disable command cause invalid-
pvst-bpdu.
Related Commands
show spanning-tree pvst — views the PVST+ conguration.
Per-VLAN Spanning Tree Plus (PVST+) 1043