Disabling The Spanning Tree Pvst Interoperability Mode - HP Bc1500 - BladeSystem - Blade PC Supplementary Manual

which then assigns the traffic to the appropriate internal MSTP instance. Before transmitting outgoing or
uplink packets, the PVST interoperability feature translates the MSTP BPDU back to RSTP. This process
allows internal operation with MSTP and external operation with other Per-VLAN spanning tree protocols
to eliminate bridging multiple per-VLAN Root instances. When communicating with an 802.1D peer, the
BPDU transmission will fall back to 802.1D as per the specification of the standard.
This feature is intended for CCI deployments that require any of the following:
•
Two (or more) VLAN configurations for the HP PC Blade Switch.
•
Any network scenario where the HP PC Blade Switch will be used to conjoin different spanning tree
domains or instances. For example, Cisco PVST or Rapid PVST.
Please note that in this mode, all uplink ports are configured to operate only in Access mode. This config-
uration permits the use link aggregation capabilities but not 802.1q (VLAN tagging).
Non-PVST deployments may utilize the IEEE-based spanning tree protocols (classic, rapid, or Multi) along
with 802.1Q to achieve a highly redundant and fault tolerant configuration.
NOTE: When operating with PVST Interoperability Mode enabled, adding custom VLANs requires
assigning instances to internal MSTP Instances to keep them separated. The instance must be configured
to use the same MSTI for common spanning tree networks.

Disabling the spanning tree PVST Interoperability mode

To completely disable the PVST Interop feature and return the switch to a clean IEEE 802.1s MSTP environ-
ment, use the following commands at the CLI console prompt:
enable
configure
no spanning-tree mst mstp-rstp
spanning-tree mst configuration
instance 1 remove vlan 1
instance 2 remove vlan 2
instance 15 remove vlan 3-4093
exit
NOTE: Configure the spanning tree mode, VLAN settings, port configuration, and other relevant switch
parameters to match the remaining requirements of the infrastructure, including MST Instance 1 - 15
should be configured with a Priority of 6440. To use a different priority, further configuration may be nec-
essary. Setting the priority to 32768 will remove references in the running configuration.
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