display stp bpdu-statistics

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

Syntax

display stp bpdu-statistics [ interface interface-type interface-number [ instance instance-list ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface interface-type interface-number: Specifies an interface by its type and number.

instance instance-list: Specifies a space-separated list of up to 10 MSTI items. Each item specifies an MSTI or a range of MSTIs in the form of instance-id1 [ to instance-id2 ]. The value for instance-id2 must be equal to or greater than the value for instance-id1. The value range for the instance-id argument is 0 to 4094, and the value 0 represents the CIST.

Usage guidelines

In MSTP mode, the command output is sorted by port name and by MSTI ID on each port.

If you do not specify an MSTI or port, this command applies to all MSTIs on all ports.
If you specify a port but not an MSTI, this command applies to all MSTIs on the port.
If you specify both an MSTI ID and a port, this command applies to the specified MSTI on the port.

In STP, RSTP, or PVST mode, the command output is sorted by port name.

If you do not specify a port, this command applies to all ports.
If you specify a port, this command applies to the port.

Examples

# In MSTP mode, display the BPDU statistics for all MSTIs on Ten-GigabitEthernet 1/0/1.

<Sysname> display stp bpdu-statistics interface ten-gigabitethernet 1/0/1
 Port: Ten-GigabitEthernet1/0/1

 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 01/13/2011
 Config sent                 0
 Config received             0
 RST sent                    0
 RST received                0
 MST sent                    4          10:33:11 01/13/2011
 MST received                151        10:37:43 01/13/2011

 Instance 0:
 Type                        Count      Last Updated
 --------------------------- ---------- -----------------
 Timeout BPDUs               0
 Max-hoped BPDUs             0
 TC detected                 1          10:32:40 01/13/2011
 TC sent                     3          10:33:11 01/13/2011
 TC received                 0

# In PVST mode, display the BPDU statistics for Ten-GigabitEthernet 1/0/1.

<Sysname> system-view
[Sysname] stp mode pvst
[Sysname] display stp bpdu-statistics interface ten-gigabitethernet 1/0/1
 Port: Ten-GigabitEthernet1/0/1

 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 31: 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 sent.
RST sent	Configuration BPDUs received.
RST received	RSTP BPDUs sent.
MST sent	RSTP BPDUs received.
MST received	MSTP BPDUs sent.
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.

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