Dell S3100 Command Line Reference Guide for the Series 9.100.1 - Page 1568

Field Interface Name Instance Sts Guard Type Description STP interface. STP 0 instance. Port state: root-inconsistent (INCON Root), forwarding (FWD), listening (LIS), blocking (BLK), or shut down (EDS Shut). 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 rootguard portfast [bpduguard [shutdown-onviol ation]] Enter the keyword loopguard to enable STP loop guard on a port or portchannel interface. Enter the keyword rootguard to enable STP root guard on a port or portchannel interface. Enter the keyword portfast to enable Portfast to move the interface into Forwarding mode immediately after the root fails. Enter the optional keyword bpduguard to disable the port when it receives a BPDU. Enter the optional keyword shutdown-on-violation to hardware disable an interface when a BPDU is received and the port is disabled. Spanning Tree Protocol (STP) 1568