20 | CLI Basicsw w w . d e l l . c o m | s u p p o r t . d e l l . c o m MULTIPLE SPANNING TREE ModeUse MULTIPLE SPANNING TREE mode to enable and configure the multiple spanning tree protocol(MSTP), as described in Multiple Spanning Tree Protocol (MSTP).To enter MULTIPLE SPANNING TREE mode:1. Verify that you are logged into CONFIGURATION mode.2. Enter the protocol spanning-tree mstp command.You can return to CONFIGURATION mode by using the exit command.PROTOCOL GVRP ModeUse the PROTOCOL GVRP mode to enable and configure generic attribute registration protocol(GARP) virtual LAN (VLAN) registration protocol (GVRP), as described in GARP VLANRegistration (GVRP).To enter PROTOCOL GVRP mode:1. Verify that you are logged into CONFIGURATION mode.2. Enter the protocol gvrp command syntax.You can return to CONFIGURATION mode by using the exit command.ROUTER OSPF ModeUse the ROUTER OSPF mode to configure open shortest path first (OSPF), as described in OpenShortest Path First (OSPFv2).To enter ROUTER OSPF mode:1. Verify that you are logged into CONFIGURATION mode.2. Use the router ospf {process-id} command.The prompt changes to include (conf-router_ospf-id).You can switch to INTERFACE mode by using the interface command or you can switch to ROUTERRIP mode by using the router rip command.ROUTER RIP ModeUse the ROUTER RIP mode to configure routing information protocol (RIP), as described in RoutingInformation Protocol (RIP).To enter ROUTER RIP mode:1. Verify that you are logged into CONFIGURATION mode.2. Enter the router rip command.The prompt changes to include (conf-router_rip).You can switch to INTERFACE mode by using the interface command or you can switch to ROUTEROSPF mode by using the router ospf command.