Dell Z9500 Command Reference Manual page 1589

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shutdown-on-

priority priority

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 an Error Disable state if a

BPDU appears and a message is logged so that the administrator can take

corrective action.

Rapid Spanning Tree Protocol (RSTP)

(OPTIONAL) Enter the keywords shutdown-on-violation

to hardware disable an interface when a BPDU is received

and the port is disabled.

Enter keyword priority then a value in increments of 16 as

the priority. The range is from 0 to 240. The default is 128.

Enter the keyword loopguard to enable loop guard on an

RSTP port or port-channel interface.

Enter the keyword rootguard to enable root guard on an

RSTP port or port-channel interface.

Introduced on the Z9500.

Introduced on the S4820T.

Introduced on the Z9000.

Added support for the optional guard keyword on the C-

Series, S-Series, and E-Series TeraScale.

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.

Introduced on the E-Series.

NOTE: A port configured as an edge port, on an RSTP switch, immediately

transitions to the Forwarding state. Only configure ports connected to end-

hosts as edge ports. Consider an edge port similar to a port with a spanning-

tree portfast enabled.