ProLiant BL p-Class GbE2 Interconnect Switch ISCLI Reference Guide

Configuration Commands 101
Table 105 Multiple Spanning Tree Configuration commands
Command Description
show spanning-tree mstp
mrst
Displays the current RSTP/MSTP configuration.
Command mode: All
NOTE:
• IEEE 802.1w standard-based RSTP implementation runs on one STG (i.e. same as one spanning tree
instance) only. As a result, if ‘rstp’ mode is selected, then only a single RSTP instance (default for STG 1) is
supported for all VLANs, including the Default VLAN 1.
• If multiple spanning tree instances are required, then select ‘mstp’ mode so that multiple VLANs are
handled by multiple spanning tree instances, as specified by IEEE 802.1s standard-based MSTP
implementation.
• IEEE 802.1s MSTP supports rapid convergence using IEEE 802.1w RSTP.
• PVST+ does not support rapid convergence in current versions.
NOTE:
The following configurations are unsupported:
• HP PVST+ (default Spanning Tree setting) is NOT interoperable with Cisco Rapid PVST+.
• HP MSTP/RSTP (with mode set to either ‘mstp’ or ‘rstp’) is NOT interoperable with Cisco Rapid PVST+.
The following configurations are supported:
• HP PVST+ (default Spanning Tree setting) is interoperable with Cisco PVST+.
• HP MSTP/RSTP (with mode set to ‘mstp’) is interoperable with Cisco MST/RSTP.
Common Internal Spanning Tree configuration
The Common Internal Spanning Tree (CIST) provides compatibility with different MSTP regions and with devices
running different Spanning Tree instances. It is equivalent to Spanning Tree Group 0.
The following table describes the commands used to configure CIST commands.
Table 106 CIST Configuration commands
Command Description
spanning-tree mstp cist-
add-vlan <1-4095>
Adds VLANs to the CIST. Enter one VLAN per line, and press Enter to add the VLANs.
Command mode: Global configuration
default spanning-tree
mstp cist
Resets all CIST parameters to their default values.
Command mode: Global configuration
show spanning-tree mstp
cist
Displays the current CIST configuration.
Command mode: All
CIST bridge configuration
CIST bridge parameters are used only when the switch is in MSTP mode. CIST parameters do not affect operation of
STP/PVST.
The following table describes the commands used to configure CIST Bridge Configuration commands.
Table 107 CIST Bridge Configuration commands
Command Description
spanning-tree mstp cist-
bridge priority {<0-65535>}
Configures the CIST bridge priority. The bridge priority parameter controls
which bridge on the network is the MSTP root bridge.
To make this switch the root bridge, configure the bridge priority lower than
all other switches and bridges on your network. The lower the value, the
higher the bridge priority. The range is 0 to 65535, and the default is
32768.
This command does not apply to RSTP. See the "Bridge Spanning Tree
configuration" section for more information.
Command mode: Global configuration