Dell PowerSwitch S5212F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 485

MST configuration OS10(config)# spanning-tree mst OS10(config)# spanning-tree mst forward-time 16 OS10(config)# spanning-tree mst hello-time 5 OS10(config)# spanning-tree mst max-age 10 OS10(config)# spanning-tree mst max-hops 30 View MSTP parameter values OS10# show spanning-tree active Spanning tree enabled protocol msti with force-version mst MSTI 0 VLANs mapped 1,31-4093 Executing IEEE compatible Spanning Tree Protocol Root ID Priority 32768, Address 3417.4455.667f Root Bridge hello time 2, max age 20, forward delay 15, max hops 20 Bridge ID Priority 32768, Address 90b1.1cf4.a523 Configured hello time 10, max age 40, forward delay 30, max hops 40 CIST regional root ID Priority 32768, Address 90b1.1cf4.a523 CIST external path cost 500 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ethernet1/1/5 128.276 128 500 FWD 0 32768 3417.4455.667f 128.146 ethernet1/1/6 128.280 128 500 BLK 0 32768 3417.4455.667f 128.150 Interface Name Role PortID Prio Cost Sts Cost Link-type Edge ethernet1/1/5 Root 128.276 128 500 FWD 0 AUTO No ethernet1/1/6 Altr 128.280 128 500 BLK 0 AUTO No Interface parameters Adjust two interface parameters to increase or decrease the likelihood that a port becomes a forwarding port. Port cost Port priority Interface type value. The greater the port cost, the less likely the port is a forwarding port. Influences the likelihood that a port is selected as a forwarding port if several ports have the same port cost. Default values for the port cost by interface: • 100-Mb/s Ethernet interfaces - 200000 • 1-Gigabit Ethernet interfaces - 20000 • 10-Gigabit Ethernet interfaces - 2000 • Port-channel with 100 Mb/s Ethernet interfaces - 180000 • Port-channel with 1-Gigabit Ethernet interfaces - 18000 • Port-channel with 10-Gigabit Ethernet interfaces - 1800 1. Change the port cost of an interface in INTERFACE mode, from 1 to 200000000. spanning-tree msti number cost 1 2. Change the port priority of an interface in INTERFACE mode, from 0 to 240 in increments of 16, default 128. spanning-tree msti number priority 32 View MSTi interface configuration OS10(conf-if-eth1/1/7)# do show spanning-tree msti 0 interface ethernet 1/1/7 ethernet1/1/7 of MSTI 0 is Designated Forwarding Edge port: No (default) Link type: point-to-point (auto) Boundary: Yes, Bpdu-filter: Disable, Bpdu-Guard: Disable, Shutdown-on-Bpdu-Guard-violation: No Root-Guard: Disable, Loop-Guard: Disable Bpdus (MRecords) Sent: 69, Received: 0 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ethernet1/1/7 0.284 0 1 FWD 0 32768 90b1.1cf4.9b8a 0.284 Layer 2 485