Technical data

RackSwitch G8124 Command Reference
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 Chapter 4: Configuration Commands BMD00076, January 2009
The following list contains guidelines about MSTP configuration and information about
interoperability.
 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.
 The following configurations are unsupported:
 MSTP/RSTP (with mode set to either mstp or rstp) is NOT interoperable with
Cisco Rapid PVST+.
 The following configurations are supported:
 PVRST+ (default Spanning Tree setting) is interoperable with Cisco PVST+.
 MSTP is interoperable with Cisco MST/RSTP.