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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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