HP 5400ZL - Manual (Page 195)

Multiple Instance Spanning-Tree Operation
Troubleshooting an MSTP Configuration
Field
RST BPDUs Tx
RST BPDUs Rx
MST BPDUs Tx
MST BPDUs Rx
MSTI MSGs Tx
MSTI MSGs Rx
Description
Number of (802.1w) RST BPDUs that are transmitted through the port. This counter is
maintained by the CIST (default MST instance 0) on a per-port basis.
Number of (802.1w) RST BPDUs that are received on the port. This counter is maintained
by the CIST (default MST instance 0) on a per-port basis.
Number of (802.1s) MST BPDUs that are transmitted through the port. This counter is
maintained by the CIST (default MST instance 0) on a per-port basis.
Number of (802.1s) MST BPDUs that are received on the port. This counter is maintained
by the CIST (default MST instance 0) on a per-port basis.
Number of times that a configuration message for a specific MSTI was encoded in (802.1s)
MST BPDUs that are transmitted through the port. This counter is maintained on a per-MSTI
per-port basis.
Number of times that the MSTI detected a configuration message destined to the MSTI in
(802.1s) MST BPDUs received on the port. This counter is maintained on a per-MSTI per-
port basis.
Troubleshooting MSTP Operation
Table 4-2. Troubleshooting MSTP Operation
Problem
Duplicate packets on a VLAN, or packets not
arriving on a LAN at all.
A switch intended to operate in a region does
not receive traffic from other switches in the
region.
Possible Cause
The allocation of VLANs to MSTIs may not be identical among all
switches in a region.
An MSTP switch intended for a particular region may not have the same
configuration name or region revision number as the other switches
intended for the same region. The MSTP configuration name (spanning­
tree config-name command) and MSTP configuration revision number
(spanning-tree config-revision command) must be identical on all MSTP
switches intended for the same region.
Another possible cause is that the set of VLANs and VLAN ID-to-MSTI
mappings (spanning-tree instance vlan command) configured on the
switch may not match the set of VLANs and VLAN ID-to-MSTI mappings
configured on other switches in the intended region.
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