Troubleshooting Spanning Tree; Testing Spanning Tree - HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual

Bridging—Transmitting Non-IP Traffic or Merging Two Networks

Troubleshooting Spanning Tree

C a u t i o n
N o t e
10-24
In a test environment, the filter keeps all connections up so that you can test
them.
You should not use the global BPDU filter on a live network.
When you enable the filter from the global configuration mode context, the
filter applies to all interfaces on the router. Enter this command:
Syntax: [no] spanning-tree edgeport bpdufilter default
To configure a interface to override the global BPDU filter, move to its
interface configuration mode context and enter this command:
Syntax: spanning-tree bpdufilter [enable | disable]
The enable option removes the interface from the spanning tree. The disable
option enables an interface to run a spanning tree protocol on a router that
blocks it globally. Because the router should always run RSTP or STP, you will
very rarely use this option.
Troubleshooting Spanning Tree
This section describes how to test and troubleshoot the router's spanning tree
functions.
You must enter show and debug commands from the enable mode context
or preface the command with do.

Testing Spanning Tree

You can run spanning tree debug commands to test a router's spanning tree
functions. (Generally, you will not use these debug commands in a live
network.) You can view debug messages to verify that:
the router chooses the correct primary connection
appropriate interfaces move quickly into the forwarding state
when a connection goes down, the network converges within one or two
seconds
The syntax for the debug commands is shown in Table 10-4.