Displaying The Mstp Configuration; Displaying Debug Information - HP procurve 8100fl series Management And Configuration Manual

Displaying the MSTP Configuration

This command output is useful for quickly verifying the allocation of VLANs
in the switch's MSTP configuration and for viewing the configured region
identifiers.
Syntax: show spanning-tree mst-config
This command displays the switch's regional configuration.
Note: The switch computes the MSTP Configuration Digest from the VID
to MSTI configuration mappings on the switch itself. As required by
the 802.1s standard, all MSTP switches within the same region must
have the same VID to MSTI assignments, and any given VID can be
assigned to either the IST or one of the MSTIs within the region. Thus,
the MSTP Configuration Digest must be identical for all MSTP
switches intended to belong to the same region. When comparing two
MSTP switches, if their Digest identifiers do not match, then they
cannot be members of the same region.
ProCurve(config)#show spanning-tree mst-config
MST Configuration Name
MST Configuration Revision : 0
MST Configuration Digest
0x2E8AC7F86DF7A1175BA6DAD829D8B209
Instance ID
-----------
1
2
Figure 9-7. Example of a Region-Level Configuration Display

Displaying Debug Information

To display information on selected spanning tree instances, settings and
events, the following debug commands can be used from the Privileged Exec
mode of the CLI:
Command
debug spanning-tree <1...16>
debug spanning-tree bpdu
MSTP Show Commands and Troubleshooting
: mstp
:
Mapped VLANs
------------
38-39
44, 55, 66
Function
Logs information about a specified MSTP instance.
Enables debugging for BPDUs. Includes the
following command line options:
• receive - Trace BDPDUs received by the switch.
• transmit - Trace BPDUs sent from the switch.
Spanning-Tree Operation
Refer to the "Note", above.
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