Dell C9000 Series Reference Manual page 1648

Networking command-line reference guide

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Not configured.

Command Modes

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.

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 misconfigured, or is subject to a

DOS attack. This option places the port into the Error Disable state if a BPDU appears,

and a message is logged so that the administrator can take corrective action.

If you do not enable shutdown-on-violation, BPDUs are still sent to the route

process module (RPM) CPU.

You cannot enable root guard and loop guard at the same time on a port. For

example, if you configure loop guard on a port on which root guard is already

configured, the following error message is displayed: % Error: RootGuard is

configured. Cannot configure LoopGuard.

Enter the keyword rootguard to enable root guard on a PVST+

port or port-channel interface.

Introduced on the C9010.

Introduced on the Z9500.

Introduced on the S4820T.

Introduced on the Z9000.

Introduced the loopguard and rootguard options on the E-

Series TeraScale, C-Series, and S-Series.

Introduced on the S4810.

Introduced the hardware shutdown-on-violation option.

Introduced on the S-Series.

Introduced on the C-Series.

Added the optional Bridge Port Data Unit (BPDU) guard.

A port configured as an edge port, on a PVST switch, immediately

transitions 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.

Per-VLAN Spanning Tree Plus (PVST+)

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