Dell Force10 S4820T FTOS Command Reference Guide - Page 1473

Table 52-2. show spanning-tree 0 guard Command Example Information Field Sts Guard Type Description 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) spanning-tree 0 c e s 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 Parameters Defaults 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. stp-id cost cost loopguard rootguard portfast [bpdugu ard [shutdo wn-on-v iolation] ] priority priority Enter the STP instance ID. Range: 0 Enter the keyword cost followed by a number as the cost. Range: 1 to 65535 Defaults: • 100 Mb/s Ethernet interface = 19 • 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 (C-, S-, and E-Series TeraScale S4810 and S4820T only) Enter the keyword loopguard to enable STP loop guard on a port or port-channel interface. (C-, S-, and E-Series TeraScale S4810 and S4820T only) Enter the keyword rootguard to enable STP root guard on a port or port-channel 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. Enter keyword priority followed by a number as the priority. Range: zero (0) to 15 Default: 8 cost = depends on the interface type; priority = 8 Spanning Tree Protocol (STP) | 1473