Mode

To be compatible with the different iterations of the IEEE 802.1D standard, the 7450 ESS, 7750 SR, and 7950 XRS support several variants of the Spanning Tree protocol:

See section Spanning Tree Operating Modes for more information about these modes.

CLI Syntax:

config>service>vpls service-id# stp 
mode {rstp | comp-dot1w | dot1w | mstp}

The default variant of the Spanning Tree protocol is rstp.