Dell S3100 Command Line Reference Guide for the Series 9.100.0 - Page 1314

Root Bridge hello time 2, max age 20, forward delay 15 Bridge ID Priority 32768, Address 0001.e800.0a56 Configured hello time 2, max age 20, forward delay 15 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID Gi 1/1 8.26 8 4 FWD 0 32768 0001.e800.0a56 8.26 Gi 1/2 8.27 8 4 FWD 0 32768 0001.e800.0a56 8.27 Gi 1/3 8.28 8 4 FWD 0 32768 0001.e800.0a56 8.28 Dell# Usage Information The following describes the show spanning-tree 0 guard command shown in the example. Field Description Interface Name Instance STP interface. STP 0 instance. Sts Port state: root-inconsistent (INCON Root), forwarding (FWD), listening (LIS), blocking (BLK), or shut down (EDS Shut). Guard Type Type of STP guard configured (Root, Loop, or BPDU guard). Example (Guard) Dell#show spanning-tree 0 guard Interface Name Instance Sts Guard type Gi 1/1 0 INCON(Root) Rootguard Gi 1/2 0 LIS Loopguard Gi 1/3 0 EDS (Shut) Bpduguard spanning-tree Assigns a Layer 2 interface to STP instance 0 and configures a port cost or port priority, or enables loop guard, root guard, or the Portfast feature on the interface. Syntax spanning-tree stp-id {cost cost | {loopguard | rootguard} | portfast [bpduguard [shutdown-on-violation]] | priority priority} To disable Spanning Tree group on an interface, use the no spanning-tree stp-id {cost cost | {loopguard | rootguard} | portfast [bpduguard [shutdown-on-violation]] | priority priority} command. Parameters stp-id cost cost Enter the STP instance ID. The range is 0. Enter the keyword cost then a number as the cost. The range is from 1 to 65535. The defaults are: • 1-Gigabit Ethernet interface = 4. • 10-Gigabit Ethernet interface = 2. • Port Channel interface with 100 Mb/s Ethernet = 18. • Port Channel interface with 1 Gigabit Ethernet = 3. • Port Channel interface with 10 Gigabit Ethernet = 1. loopguard Enter the keyword loopguard to enable STP loop guard on a port or port-channel interface. rootguard Enter the keyword rootguard to enable STP root guard on a port or port-channel interface. portfast Enter the keyword portfast to enable Portfast to move the interface into Forwarding [bpduguard mode immediately after the root fails. [shutdown-on-viol ation]] Enter the optional keyword bpduguard to disable the port when it receives a BPDU. 1314 Spanning Tree Protocol (STP)