Dell Force10 S25N-S50N FTOS Command Line Reference Guide FTOS 8.4.2.7 E-Series - Page 1426

www.dell.com | support.dell.com 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 spanning-tree stp-id {cost cost | {loopguard | rootguard} | portfast [bpduguard [shutdown-on-violation]] | priority priority} Parameters stp-id cost cost loopguard rootguard portfast [bpduguard [shutdown-onviolation]] 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 Enter the keyword loopguard to enable STP loop guard on a port or port-channel interface. 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 Defaults cost = depends on the interface type; priority = 8 Command Modes INTERFACE Command History Version 8.5.1.0 Version 8.4.2.1 Version 8.2.1.0 Version 7.7.1.0 Version 7.5.1.0 Version 6.2.1.1 Introduced the loopguard and rootguard options on the E-Series ExaScale. Introduced the loopguard and rootguard options on the E-Series TeraScale, C-Series, and S-Series. Introduced shutdown-on-violation option. Introduced on S-Series. Introduced on C-Series. Introduced. 1426 | Spanning Tree Protocol (STP)