Configuration Commands
130
Table 104 Multiple Spanning Tree Configuration commands
Command Description
spanning-tree mstp maximum-hop
<4-60>
Configures the maximum number of bridge hops a packet may to
traverse before it is dropped. The range is from 4 to 60 hops. The
default is 20.
Command mode: Global configuration
spanning-tree mode
{mst|rstp|pvst}
Selects the spanning-tree mode, as follows:
• Rapid Spanning Tree mode (rstp)
• Multiple Spanning Tree mode (mstp)
• Per VLAN Spanning Tree (pvst)
The default mode is pvst.
Command mode: Global configuration
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.
