Dell Force10 MXL Blade - Page 457

Per-VLAN Spanning Tree Plus (PVST+) | 457
By default bpdu filtering on an interface is disabled.
Example
Figure 24-8. spanning-tree pvst vlan Command Example
Related
Commands
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 err-disabled state if they receive a PVST+ BPDU when they are members
of an untagged VLAN.
Command Modes
INTERFACE
Command
History
Usage
Information
Some non-Dell Force10 systems which have hybrid ports participating in PVST+ transmit two kinds of
BPDUs: an 802.1D BPDU and an untagged PVST+ BPDU.
Dell Force10 systems do not expect PVST+ BPDU on an untagged port. If this happens, FTOS places
the port in error-disable state. This behavior might result in the network not converging. To prevent
FTOS from executing this action, use the command no spanning-tree pvst err-disable cause
invalid-pvst-bpdu
.
Related
Commands
Note: A port configured as an edge port, on a PVST switch, 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 a spanning-tree portfast enabled.
FTOS(conf-if-te-1/1)#spanning-tree pvst vlan 3 cost 18000
FTOS(conf-if-te-1/1)#end
FTOS(conf-if-te-1/1)#show config
!
interface TenGigabitEthernet 1/1
no ip address
switchport
spanning-tree pvst vlan 3 cost 18000
no shutdown
FTOS(conf-if-te-1/1)#end
FTOS#
show spanning-tree pvst View PVST+ configuration
Version 8.3.16.1 Introduced on MXL 10/40GbE Switch IO Module
show spanning-tree pvst View the PVST+ configuration.