Dell MX9116n EMC SmartFabric OS10 User Guide - Page 440

Interface Name Role PortID Prio Cost Sts Cost Link-type Edge ethernet1/1/1 Altr 128.244 128 500 BLK 0 AUTO No ethernet1/1/2 Altr 128.248 128 500 BLK 0 AUTO No ethernet1/1/3 Root 128.252 128 500 FWD 0 AUTO No ethernet1/1/4 Altr 128.256 128 500 BLK 0 AUTO No Interface parameters Set the port cost and port priority values on interfaces in L2 mode. Port cost Port priority Value based on the interface type. The previous table lists the default values. The greater the port cost, the less likely the port is selected as a forwarding port. Influences the likelihood a port is selected to be a forwarding port in case several ports have the same port cost. • Change the port cost of an interface in INTERFACE mode, from 1 to 200000000. spanning-tree rstp cost cost • Change the port priority of an interface in INTERFACE mode, from 0 to 240, default 128. spanning-tree rstp priority priority-value View current global parameter values OS10# show spanning-tree active Spanning tree enabled protocol rstp with force-version rstp Executing IEEE compatible Spanning Tree Protocol Root ID Priority 32768, Address 90b1.1cf4.9b8a Root Bridge hello time 2, max age 20, forward delay 15 Bridge ID Priority 32768, Address 90b1.1cf4.9b8a We are the root Configured hello time 2, max age 20, forward delay 15 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ethernet1/1/1 244.128 128 500 BLK 0 32768 90b1.1cf4.9b8a 128.244 ethernet1/1/2 248.128 128 500 BLK 0 32768 90b1.1cf4.9b8a 128.248 ethernet1/1/3 252.128 128 500 FWD 0 32768 90b1.1cf4.9b8a 128.252 ethernet1/1/4 256.128 128 500 BLK 0 32768 90b1.1cf4.9b8a 128.256 Interface Name Role PortID Prio Cost Sts Cost Link-type Edge ethernet1/1/1 Altr 128.244 128 500 BLK 0 AUTO No ethernet1/1/2 Altr 128.248 128 500 BLK 0 AUTO No ethernet1/1/3 Root 128.252 128 500 FWD 0 AUTO No ethernet1/1/4 Altr 128.256 128 500 BLK 0 AUTO No Root bridge selection RSTP determines the root bridge. Assign one bridge a lower priority to increase the likelihood that it is selected as the root bridge. • Assign a number as the bridge priority or designate it as the primary or secondary root bridge in CONFIGURATION mode. Configure the priority value range, from 0 to 65535 in multiples of 4096, default 32768. The lower the number assigned, the more likely the bridge becomes the root bridge. spanning-tree rstp priority priority-value View bridge priority and root bridge assignment OS10# show spanning-tree active Spanning tree enabled protocol rstp with force-version rstp 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 Bridge ID Priority 36864, Address 90b1.1cf4.a523 440 Layer 2