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3-31

Multiple Instance Spanning-Tree Operation

Configuring MSTP

Example. To configure BPDU protection on ports 1 to 10 with SNMP traps

enabled, enter:

HP Switch(config)# spanning-tree 1-10 bpdu protection

HP Switch(config)# spanning-tree trap errant-bpdu

The following steps will then be set in process:

1. When an STP BPDU packet is received on ports 1-10, STP treats it as an

unauthorized transmission attempt and shuts down the port that the

BPDU came in on.

2. An event message is logged and an SNMP notification trap is generated.

3. The port remains disabled until re-enabled manually by a network admin-

istrator using the interface <port-list> enable command.

Note To re-enable the bpdu-protected ports automatically, configure a timeout

period using the spanning-tree bpdu-protection-timeout command.

Viewing BPDU Protection Status. The show spanning-tree bpdu-protection

command displays a summary listing of ports with BPDU protection enabled.

To display detailed per port status information, enter the specific port

number(s) as shown in Figure 3-8 below.

Figure 3-8. Example of Show Spanning Tree BPDU Protection Command

HP Switch(config)# show spanning-tree bpdu-protection a1

Status and Counters - STP BPDU Protection Information

BPDU Protection Timeout (sec) : 0

Protected Ports : A1

Port Type Protection State Errant BPDUs

---- ------------ ------------- -------------- ---------------

A1 100/1000T Yes Bpdu Error 1

Specifying the port displays

additional status information

for the designated ports.

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