Multiple Instance Spanning-Tree Operation

802.1s Multiple Spanning Tree Protocol (MSTP)

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

ProCurve(config)# spanning-tree a9 bpdu-filter

Viewing BPDU Filtering. The spanning-tree show < port> configuration command displays the BPDU’s filter state.

ProCurve(config)# show spanning-tree a9 config

...

 

 

Column showing BPDU filter status

 

 

 

 

 

 

 

 

 

BPDU

Port Type

Cost

Priority Edge

Point-to-Point

 

 

MCheck Filter

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

+ ---------

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

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

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

A9 100/1000T

Auto

128

Yes

Force-True

Yes

Yes

Figure 5-5. 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.

ProCurve(config)# show configuration

. . .

spanning-treeRows showing ports with BPDU filters enabled spanning-tree A9 bpdu-filter

spanning-tree C7 bpdu-filter spanning-tree Trk2 priority 4

. . .

Figure 5-6. 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 5-7.

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