display stp bpdu-statistics

Syntax

display stp bpdu-statistics [ interface interface-type interface-number [ instance instance-id ] ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

interface interface-type interface-number: Displays the BPDU statistics on a specified port, where interface-type interface-number indicates the port type and number.

instance instance-id: Displays the BPDU statistics of a specified MSTI on a specified port. The value of instance-id ranges from 0 to 16, where 0 represents the CIST.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

exclude: Displays all lines that do not match the specified regular expression.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display stp bpdu-statistics to display the BPDU statistics on ports.

In MSTP mode, follow these guidelines:

If you do not specify any MSTI or port, this command displays the BPDU statistics of all MSTIs on all ports. The displayed information is sorted by port name and by MSTI ID on each port.
If you specify a port but not an MSTI, this command displays the BPDU statistics of all MSTIs on the port. The displayed information is sorted by MSTI ID.
If you specify both an MSTI ID and a port, this command displays the BPDU statistics of the specified MSTI on the port.

In STP, RSTP, or PVST mode, follow these guidelines:

If you do not specify any port, this command displays the BPDU statistics of on all ports. The displayed information is sorted by port name.
If you specify a port, this command displays the BPDU statistics on the port.

Examples

# In MSTP mode, display the BPDU statistics of all MSTIs on Ethernet 1/0/1.

<Sysname> display stp bpdu-statistics interface ethernet 1/0/1
 Port: Ethernet1/0/1

 Instance-independent:

 Type                        Count      Last Updated
 --------------------------- ---------- -----------------
 Invalid BPDUs               0
 Looped-back BPDUs           0
 MAX-aged BPDUs              0
 TCN sent                    0
 TCN received                0
 TCA sent                    0
 TCA received                2          10:33:12 01/13/2010
 Config sent                 0
 Config received             0
 RST sent                    0
 RST received                0
 MST sent                    4          10:33:11 01/13/2010
 MST received                151        10:37:43 01/13/2010

 Instance 0:

 Type                        Count      Last Updated
 --------------------------- ---------- -----------------
 Timeout BPDUs               0
 MAX-hoped BPDUs             0
 TC detected                 1          10:32:40 01/13/2010
 TC sent                     3          10:33:11 01/13/2010
 TC received                 0

 Instance 1:

 Type                        Count      Last Updated
 --------------------------- ---------- -----------------
 Timeout BPDUs               0
 MAX-hoped BPDUs             0
 TC detected                 0
 TC sent                     0
 TC received                 0

 Instance 2:

 Type                        Count      Last Updated
 --------------------------- ---------- -----------------
 Timeout BPDUs               0
 MAX-hoped BPDUs             0
 TC detected                 0
 TC sent                     0
 TC received                 0

# In PVST mode, display the BPDU statistics on Ethernet 1/0/1.

<Sysname> system-view
[Sysname] stp mode pvst
[Sysname] display stp bpdu-statistics interface ethernet 1/0/1
 Port: Ethernet1/0/1

 Type                        Count      Last Updated
 --------------------------- ---------- -----------------
 Invalid BPDUs               0
 Looped-back BPDUs           0
 MAX-aged BPDUs              0
 TCN sent                    0
 TCN received                0
 TCA sent                    0
 TCA received                2          10:33:12 01/13/2010
 Config sent                 0
 Config received             0
 RST sent                    0
 RST received                0
 MST sent                    4          10:33:11 01/13/2010
 MST received                151        10:37:43 01/13/2010
 Timeout BPDUs               0
 MAX-hoped BPDUs             0
 TC detected                 511        10:32:40 01/13/2010
 TC sent                     8844       10:33:11 01/13/2010
 TC received                 1426       10:33:32 01/13/2010

Table 25: Command output

Field	Description
Port	Port name.
Instance-independent	Statistics not related to any particular MSTI.
Type	Statistical item.
Looped-back BPDUs	BPDUs sent and then received by the same port.
Max-Aged BPDUs	BPDUs whose max age was exceeded.
TCN Sent	TCN BPDUs sent.
TCN Received	TCN BPDUs received.
TCA Sent	TCA BPDUs sent.
TCA Received	TCA BPDUs received.
Config Sent	Configuration BPDUs sent.
Config Received	Configuration BPDUs received.
RST Sent	RSTP BPDUs sent.
RST Received	RSTP BPDUs received.
MST Sent	MSTP BPDUs sent.
MST Received	MSTP BPDUs received.
Instance	Statistical information for a particular MSTI.
Timeout BPDUs	Expired BPDUs.
Max-Hoped BPDUs	BPDUs whose maximum hops were exceeded.
TC Detected	TC BPDUs detected.
TC Sent	TC BPDUs sent.
TC Received	TC BPDUs received.

prev	up	next
display stp abnormal-port	home	display stp down-port