Dell PowerSwitch S5212F-ON OS10 Enterprise Edition User Guide Release 10.4.3.0 - Page 357

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 Configured hello time 2, max age 20, forward delay 15 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ethernet1/1/6:3 128.282 128 2000 FWD 0 32768 3417.4455.667f 128.152 ethernet1/1/6:4 128.283 128 2000 BLK 0 32768 3417.4455.667f 128.153 Interface Name Role PortID Prio Cost Sts Cost Link-type Edge ethernet1/1/6:3 Root 128.282 128 2000 FWD 0 AUTO No ethernet1/1/6:4 Altr 128.283 128 2000 BLK 0 AUTO No EdgePort forward traffic EdgePort allows the interface to forward traffic approximately 30 seconds sooner as it skips the Blocking and Learning states. The spanning-tree bpduguard enable command causes the interface hardware to shut down when it receives a BPDU. CAUTION: Configure EdgePort only on links connecting to an end station. EdgePort can cause loops if you enable it on an interface connected to a network. • Enable EdgePort on an interface in INTERFACE mode. spanning-tree port type edge Configure EdgePort and view interface status OS10(conf-if-eth1/1/5)# spanning-tree port type edge View interface status OS10# show spanning-tree interface ethernet 1/1/5 ethernet1/1/5 of RSTP 1 is designated Forwarding Edge port:yes port guard :none (default) Link type is point-to-point (auto) Boundary: YES bpdu filter :disable bpdu guard :disable bpduguard shutdown-on- violation :disable RootGuard: disable LoopGuard disable Bpdus (MRecords) sent 610, received 5 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ethernet1/1/5 128.272 128 500 FWD 0 32768 90b1.1cf4.a911 128.272 Layer 2 357