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Command Line Interface Reference Guide HP BladeSystem PC Blade Switch

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HP PC Blade Switch CLI Reference Guide www.hp.com 22-39
Spanning-Tree Commands
spanning-tree mst mstp-rstp
The spanning-tree mst mstp-rstp interface configuration command configures the port to
convert RSTP packets to MSTP instances. Use the no form of this command to disable this
feature.
When interoperating with switches that do not support or are not configured for Per VLAN
Spanning-Tree (PVST/PVST+) disable this feature and configure the HP PC Blade switch to use
the matching IEEE standard Spanning-Tree Protocol mode.
.
When MSTP-to-RSTP is enabled (enabled by default), attempting to put any switch port into
trunk or general mode will cause the following error message: Port <Number>, extension
separated-bridge exist. This feature does not support VLAN Trunking (a.k.a VLAN Tagging).
Syntax
spanning-tree mst mstp-rstp
no spanning-tree mst mstp-rstp
Parameters
This command has no arguments or keywords.
Default Setting
Enabled.
Command Modes
Global Configuration mode
Command Usage
This feature can only be enabled when the switch is configured for spanning-tree mode mstp.
This is a non-standard feature that maps an individual PVST instance [e.g., Cisco PVST/PVST+
or Rapid PVST/PVST+] to an individual MSTP instance over a statically assigned VLAN.
Ingress BPDUs are handled by the internal MSTP instance for which the participating static
VLAN switch port is assigned.
The egress Spanning-Tree BPDU will have a bridge ID composed of the configured priority for
the switch multiplied by 4096, plus the VLAN ID assigned to the egress port, concatenated to the
bridge MAC address.
By default, all external switch port egress IEEE 802.1w BPDUs. If the port encounters a legacy
IEEE 802.1D BPDU, the conversion process will communicate with the legacy version.
For this feature to work as expected, only one VLAN can be assigned to each switch port on both
the upstream and downstream switch. Since the switch ports are Access mode, the VLANs on
each side of the link do not need to have the same VLAN ID. If desirable, the VLAN assigned to
the HP PC Blade Switch can be changed so that its ID matches the VLAN ID of the upstream
switch.