HP ProCurve Switch 6120G/XG Management Manual page 121

Hp procurve series 6120 blade switches advanced traffic management guide
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Multiple Instance Spanning-Tree Operation
Configuring MSTP
4-22
Syntax: spanning-tree config-revision < revision-number >
This command configures the revision number you designate
for the MST region in which you want the switch to reside.
This setting must be the same for all switches residing in the
same region. Use this setting to differentiate between region
configurations in situations such as the following:
• Changing configuration settings within a region where you
want to track the configuration versions you use
• Creating a new region from a subset of switches in a current
region and want to maintain the same region name.
• Using the pending option to maintain two different
configuration options for the same physical region.
Note that this setting must be the same for all MSTP switches
in the same MST region. (Range: 0 - 65535; Default: 0)
Note: This option is available only when the switch is
configured for MSTP operation.
Syntax: spanning-tree force-version < stp-compatible | rstp-operation |
mstp-operation >
Sets the spanning-tree compatibility mode. This command
forces the switch to emulate behavior of earlier versions of
spanning tree protocol, or return to MSTP behavior. The
command is useful in test or debug applications, and removes
the need to reconfigure the switch for temporary changes in
spanning-tree operation.
stp-compatible: The switch applies 802.1D STP operation on all
ports.
rstp-operation: The switch applies 802.1w operation on all ports
except those ports where it detects a system using 802.1D
Spanning Tree.
mstp-operation: The switch applies 802.1s MSTP operation on
all ports where compatibility with 802.1D or 802.1w spanning
tree protocols is not required.
Note that even when mstp-operation is selected, if the switch
detects an 802.1D BPDU or an 802.1w BPDU on a port, it
communicates with the device linked to that port using STP
or RSTP BPDU packets. Also, if errors are encountered as
described in the "Note on MSTP Rapid State Transitions" on
page 4-18, setting force-version to stp-compatible forces the
MSTP switch to communicate out all ports using operations
that are compatible with IEEE 802.1D STP.

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