3Com MSR 50, MSR 30 Display stp down-port, Display stp history, Syntax display stp down-port, 601

601

Table 104 Description on the fields of the display stp abnormal-port command

Field	Description
MSTID	MST instance ID
Blocked Port	Name of blocked port, which corresponds to the related MST instance
Reason	Reason that caused abnormal blocking of the port.
	■ ROOT-Protected: root guard action
	■ LOOP-Protected: loop guard action
	■ Formatcompatibility-Protected: MSTP BPDU format compatibility
	protection action

display stp down-port

Syntax display stp down-port

View Any view

Parameters None

Description Use the display stp down-portcommand to view the information about ports blocked by STP protection actions.

These actions include:

■BPDU attack guard action

■MSTP BPDU format compatibility protection action

Examples # View the information about ports blocked by STP protection actions.

<Sysname> display stp down-port

Down Port Reason

Ethernet1/0 BPDU-Protected

Ethernet1/1 Formatfrequency-Protected

Table 105 Description on the fields of the display stp abnormal-port command

Field	Description
Down Port	Name of blocked port
Reason	Reason that caused the port to be blocked.
	■ BPDU-Protected: BPDU attack guard action
	■ Formatfrequency-Protected: MSTP BPDU format compatibility
	protection action

display stp history

Syntax display stp [ instance instance-id] history

View Any view