Configuration Commands

 

Table 104 Multiple Spanning Tree Configuration commands

 

 

 

 

 

Command

Description

 

 

 

 

 

spanning-tree mstp maximum-hop

Configures the maximum number of bridge hops a packet may to

<4-60>

traverse before it is dropped. The range is from 4 to 60 hops. The

 

 

default is 20.

 

 

Command mode: Global configuration

 

 

 

 

 

spanning-tree mode

Selects the spanning-tree mode, as follows:

 

{mstrstppvst}

• 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.

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