3com MSR 20-20 참조 매뉴얼

C

HAPTER

 38: MSTP C

ONFIGURATION

 C

OMMANDS

<Sysname> display stp instance 0 interface Ethernet 1/1 to Ethernet

1/4 GigabitEthernet 1/1 to GigabitEthernet 1/4 brief

MSTID

Port

Role

STP State

Protection

0

Ethernet1/1

ALTE

DISCARDING

LOOP

0

Ethernet1/2

DESI

FORWARDING

NONE

0

Ethernet1/3

DESI

FORWARDING

NONE

0

Ethernet1/4

DESI

FORWARDING

NONE

0

GigabitEthernet1/1

DESI

FORWARDING

NONE

0

GigabitEthernet1/2

DESI

FORWARDING

NONE

0

GigabitEthernet1/3

DESI

FORWARDING

NONE

0

GigabitEthernet1/4*

DESI

FORWARDING

NONE

(*) means port in aggregation group 

Any view

None

Use the display stp abnormal-port command to view the information about 
abnormally blocked ports.

Any of the following reasons may cause a port to be abnormally blocked:

■

Root guard action

■

Loop guard action

■

MSTP BPDU format compatibility protection action

# View information about abnormally blocked ports.

<Sysname> display stp abnormal-port

MSTID

Blocked Port

Reason

1

Ethernet1/0

ROOT-Protected

2

Ethernet1/1

LOOP-Protected

2

Ethernet1/2

Formatcompatibility-Protected 

Table 103   Description on the fields of the display stp command

MSTID 

MST instance ID in the MST region 

Port 

Port name, corresponding to each MST instance 

Role Port 

role 

STP State 

MSTP status on the port, including forwarding, discarding, and 
learning 

Protection 

Protection type on the port, including root guard, loop guard, 
and BPDU guard 

(*) means port in aggregation 
group 

* indicates a port in an aggregation group