Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module Configuration Guide - Page 594
Root Guard Configuration, SNMP Traps for Root Elections and Topology Changes
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www.dell.com | support.dell.com Root Guard Configuration You enable STP root guard on a per-port or per-port-channel basis. FTOS Behavior: The following conditions apply to a port enabled with STP root guard: • Root guard is supported on any STP-enabled port or port-channel interface except when used as a stacking port. • Root guard is supported on a port in any Spanning Tree mode: • Spanning Tree Protocol (STP) (STP) • Rapid Spanning Tree Protocol (RSTP) • Multiple Spanning Tree Protocol (MSTP) • Per-VLAN Spanning Tree Plus (PVST+) • When enabled on a port, root guard applies to all VLANs configured on the port. • 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. To enable the root guard on an STP-enabled port or port-channel interface in instance 0, use the spanning-tree 0 rootguard command. Task Enable root guard on a port or port-channel interface. 0: Enables root guard on an STP-enabled port assigned to instance 0. mstp: Enables root guard on an MSTP-enabled port. rstp: Enables root guard on an RSTP-enabled port. pvst: Enables root guard on a PVST-enabled port. Command Syntax Command Mode spanning-tree {0 | mstp | rstp | pvst} rootguard INTERFACE INTERFACE PORT-CHANNEL To disable STP root guard on a port or port-channel interface, use the no spanning-tree 0 rootguard command in INTERFACE Configuration mode. To verify the STP root guard configuration on a port or port-channel interface, use the show spanning-tree 0 guard [interface interface] command in Global Configuration mode. SNMP Traps for Root Elections and Topology Changes To enable SNMP traps for STP state changes, use the snmp-server enable traps stp command. To enable SNMP traps for RSTP, MSTP, and PVST+ collectively, use the snmp-server enable traps xstp command. 592 | Spanning Tree Protocol (STP)
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