Dell Force10 S25N-S50N FTOS Command Line Reference Guide FTOS 8.4.2.7 E-Series - Page 950

www.dell.com | support.dell.com Command History Version 7.6.1.0 Version 7.5.1.0 Version 6.5.1.0 Added support for S-Series Added support for C-Series Introduced on E-Series spanning-tree mstp c e s Configures a Layer 2 MSTP interface as an edge port with (optionally) a Bridge Protocol Data Unit (BPDU) guard, or enables the root guard or loop guard feature on the interface. Syntax spanning-tree mstp {edge-port [bpduguard [shutdown-on-violation]] | loopguard | rootguard} Parameters edge-port bpduguard shutdown-onviolation loopguard rootguard Enter the keyword edge-port to configure the interface as a Multiple Spanning Tree edge port. (OPTIONAL) Enter the keyword portfast to enable Portfast to move the interface into forwarding mode immediately after the root fails. Enter the keyword bpduguard to disable the port when it receives a BPDU. (OPTIONAL) Enter the keyword shutdown-on-violation to hardware disable an interface when a BPDU is received and the port is disabled. Enter the keyword loopguard to enable STP loop guard on an MSTP port or port-channel interface. Enter the keyword rootguard to enable root guard on an MSTP port or port-channel interface. Command Modes INTERFACE Command History Version 8.5.1.0 Version 8.4.2.1 Version 8.2.1.0 Version 7.6.1.0 Version 7.5.1.0 Version 6.1.1.0 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 hardware shutdown-on-violation option Added support for S-Series Added support for C-Series Support for BPDU guard added Usage Information On an MSTP switch, a port configured as an edge port will immediately transition to the forwarding state. Only ports connected to end-hosts should be configured as an edge port. Consider an edge port similar to a port with spanning-tree portfast enabled. If shutdown-on-violation is not enabled, BPDUs will still be sent to the RPM CPU. Root guard and loop guard cannot be enabled at the same time on a port. For example, if you configure loop guard on a port on which root guard is already configured, the following error message is displayed: % Error: RootGuard is configured. Cannot configure LoopGuard. When used in an MSTP network, if root guard blocks a boundary port in the CIST, the port is also blocked in all other MST instances. 950 | Multiple Spanning Tree Protocol (MSTP)