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3-29

Multiple Instance Spanning-Tree Operation

Configuring MSTP

For example, to configure BPDU filtering on port a9, enter:

HP Switch(config)# spanning-tree a9 bpdu-filter

Viewing BPDU Filtering. The spanning-tree show <port> configuration

command displays the BPDU’s filter state.

Figure 3-5. Example of BPDU Filter in Show Spanning Tree Configuration Command

BPDU filters per port are displayed as separate entries of the spanning tree

category within the configuration file.

Figure 3-6. Example of BPDU Filters in the Show Configuration Command

Configuring BPDU Protection

BPDU protection is a security feature designed to protect the active STP

topology by preventing spoofed BPDU packets from entering the STP domain.

In a typical implementation, BPDU protection would be applied to edge ports

connected to end user devices that do not run STP. If STP BPDU packets are

received on a protected port, the feature will disable that port and alert the

network manager via an SNMP trap as shown in Figure 3-7.

HP Switch(config)# show spanning-tree a9 config

...

| Path Prio Admin Auto Admin Hello Root TCN BPDU

Port Type | Cost rity Edge Edge PtP Time Guard Guard Flt

----- --------- + --------- ----- ----- ----- ----- ------ ------ ------ ----

A9 100/1000T | Auto 128 No Yes True Global No No Yes

Column showing BPDU filter status

HP Switch(config)# show configuration

. . .

spanning-tree

spanning-tree A9 bpdu-filter

spanning-tree C7 bpdu-filter

spanning-tree Trk2 priority 4

. . .

Rows showing ports with BPDU filters enabled

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