Dell MX5108n OS10 Enterprise Edition User Guide for PowerEdge MX IO Modules Re - Page 211

3 Ensure the same region name is configured in all the bridges running MST. 4 (Optional) Configure the revision number. Configure MST protocol When you enable MST globally, all L2 physical, port-channel, and VLAN interfaces are automatically assigned to MST instance (MSTI) zero (0). Within an MSTI, only one path from any one bridge to another is enabled for forwarding. • Enable MST in CONFIGURATION mode. spanning-tree mode mst Configure and verify MSTP OS10(config)# spanning-tree mode mst OS10(config)# do show spanning-tree show spanning-tree mst configuration Region Name: ravi Revision: 0 MSTI VID 0 1,7-4093 1 2 2 3 3 4 4 5 5 6 Add or remove interfaces By default, all interfaces are enabled in L2 switchport mode, and all L2 interfaces are part of spanning-tree. • Disable spanning-tree on an interface in INTERFACE mode. spanning-tree disable • Enable MST on an interface in INTERFACE mode. no spanning-tree disable Create instances You can create multiple MSTP instances and map VLANs. A single MSTI provides no more benefit than RSTP. To take full advantage of the MST protocol, create multiple MSTIs and map VLANs to them. 1 Enter an instance number in CONFIGURATION mode. spanning tree mst configuration 2 Enter the MST instance number in MULTIPLE-SPANNING-TREE mode (0 to 63). instance instance-number 3 Enter the VLAN and IDs to participate in the MST instance in MULTIPLE-SPANNING-TREE mode (1 to 4096). instance vlan-id Create MST instances OS10(config)# spanning-tree mst configuration OS10(conf-mst)# name force10 OS10(conf-mst)# revision 100 OS10(conf-mst)# instance 1 vlan 2-10 OS10(conf-mst)# instance 2 vlan 11-20 OS10(conf-mst)# instance 3 vlan 21-30 Layer 2 211