Dell Z9500 Command Reference Manual page 1465

Hide thumbs Also See for Z9500:

Table of Contents

Not configured.

This guide is platform-specific. For command information about other platforms,

refer to the relevant Dell Networking OS Command Line Reference Guide.

The following is a list of the Dell Networking OS version history for this command.

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.

When used in a PVST+ network, loop guard is performed per-port or per-port

channel at a VLAN level. If no BPDUs are received on a VLAN interface, the port or

port-channel transitions to a Loop-Inconsistent (blocking) state only for this VLAN.

Per-VLAN Spanning Tree Plus (PVST+)

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

Introduced on the S-Series.

Introduced on the C-Series.

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

NOTE: 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.