display stp bpdu-statistics
Use display stp bpdu-statistics to display the BPDU statistics for ports.
Syntax
display stp bpdu-statistics [ interface interface-type interface-number [ instance instance-list ] ]
Views
Any view
Predefined user roles
network-admin
network-operator
mdc-admin
mdc-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 PVID inconsistency BPDUs 0
Table 39: Command output
Field | Description |
|---|---|
Port | Port name. |
Instance-Independent | Statistics not related to a specific MSTI. |
Type | Statistical item. |
Looped-back BPDUs | Number of BPDUs sent and then received by the same port. |
Max-aged BPDUs | Number of BPDUs whose max age was exceeded. |
TCN sent | Number of sent TCN BPDUs. |
TCN received | Number of received TCN BPDUs. |
TCA sent | Number of sent TCA BPDUs. |
TCA received | Number of received TCA BPDUs. |
Config sent | Number of sent configuration BPDUs. |
Config received | Number of received configuration BPDUs. |
RST sent | Number of sent RSTP BPDUs. |
RST received | Number of received RSTP BPDUs. |
MST sent | Number of sent MSTP BPDUs. |
MST received | Number of received MSTP BPDUs. |
Instance | Statistics for a specific MSTI. |
Timeout BPDUs | Number of expired BPDUs. |
Max-hoped BPDUs | Number of BPDUs whose maximum hops were exceeded. |
TC detected | Number of detected topology changes. |
TC sent | Number of sent TC BPDUs. |
TC received | Number of received TC BPDUs. |
PVID inconsistency BPDUs | Number of received PVST BPDUs with a PVID inconsistent with the incoming port. |