HP ProCurve Series 3400cl Release Notes page 99

C a u t i o n
Ports configured with the BPDU filter mode remain active (learning and forward frames); however,
spanning-tree cannot receive or transmit BPDUs on the port. The port remains in a forwarding state,
permitting all broadcast traffic. This can create a network storm if there are any loops (that is, trunks
or redundant links) using these ports. If you suddenly have a high load, disconnect the link and
remove ("no") the bpdu-filter.
Viewing Status of BPDU Filtering
The show spanning-tree <port-list> detail command has been extended to show per-port BPDU filter
mode as shown below.
ProCurve# show spanning-tree a9 detail
Status and Counters - CST Port(s) Detailed Information
Port
Status
BPDU Filtering
Errant BPUDUs received
MST Region Boundary
External Path Cost
External Root Path Cost
Administrative Hello Time : Use Global
Operational Hello Time
AdminEdgePort
OperEdgePort
AdminPointToPointMAC
OperPointToPointMAC
Aged BPDUs Count
Loop-back BPDUs Count
TC ACK Flag Transmitted
TC ACK Flag Received
MST MST
BPDUs Tx BPDUs Rx
---------- ---------- ---------- ---------- ---------- ----------
8 28
Figure 23. Example of BPDU Filter Fields in Show Spanning Tree Detail Command
: A1
: Up
: Yes
: 65
: Yes
: 200000
: 420021
: 2
: No
: No
: Force-True
: Yes
: 0
: 0
: 0
: 0
CFG CFG
BPDUs Tx BPDUs Rx
0 0
Release M.10.10 Enhancements
Rows indicating BPDU filtering
has been enabled and number of
errant BPDUs received.
Column indicating BPDU frames
accepted for processing when
permitted by BPDU filter.
TCN TCN
BPDUs Tx BPDUs Rx
0 0
Enhancements
89