To be compatible with the different iterations of the IEEE 802.1D standard, the 7210 SAS supports several variants of the Spanning Tree protocol:
rstp - Rapid Spanning Tree Protocol (RSTP) compliant with IEEE 802.1D-2004 - default mode
dot1w - compliant with IEEE 802.1w
comp-dot1w - operation as in RSTP but backwards compatible with IEEE 802.1w (this mode was introduced for interoperability with some MTU types)
mstp - compliant with the Multiple Spanning Tree Protocol specified in IEEE 802.1Q REV/D5.0-09/2005 (this mode of operation is only supported in an mVPLS)
pmstp - compliant with the Multiple Spanning Tree Protocol specified in IEEE 802.1Q REV/D3.0-04/2005 but with some changes to make it backwards compatible to 802.1Q 2003 edition and IEEE 802.1w
See section Spanning tree operating modes for more information about these modes.
— config>service>vpls service-id# stp
— mode {rstp | comp-dot1w | dot1w | mstp|pmstp}
Default: rstp