Reference Guide

Related
Commands
show spanning-tree pvst — views the PVST+ configuration.
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.
S4820T
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
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 8.2.1.0 Introduced.
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,
FTOS places the port in the Error-Disable state. This behavior might result in the network not
converging. To prevent FTOS 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+ configuration.
tc-flush-standard
Enable the MAC address flushing after receiving every topology change notification.
S4820T
Syntax
tc-flush-standard
To disable, use the no tc-flush-standard command.
1086