Dell PowerSwitch S4820T 9.50.1 Configuration Guide for the S4820T System - Page 927
Enabling SNMP Traps for Root Elections and Topology Changes, Configuring Spanning Trees as Hitless
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• Enable root guard on a port or port-channel interface. INTERFACE mode or INTERFACE PORT-CHANNEL mode spanning-tree {0 | mstp | rstp | pvst} rootguard - 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. To disable STP root guard on a port or port-channel interface, use the no spanning-tree 0 rootguard command in an interface configuration mode. To verify the STP root guard configuration on a port or port-channel interface, use the show spanningtree 0 guard [interface interface] command in a global configuration mode. Enabling SNMP Traps for Root Elections and Topology Changes To enable SNMP traps individually or collectively, use the following commands. • Enable SNMP traps for spanning tree state changes. snmp-server enable traps stp • Enable SNMP traps for RSTP, MSTP, and PVST+ collectively. snmp-server enable traps xstp Configuring Spanning Trees as Hitless Configuring spanning trees as hitless is supported only on S4820T platform. You can configure STP, RSTP, MSTP, and PVST+ to be hitless (configure all or none as hitless). When configured as hitless, critical protocol state information is synchronized between the RPMs so that RPM failover is seamless and no topology change is triggered. To be hitless per spanning tree type or for all spanning tree types, use the following commands. • Configure LACP to be hitless. CONFIGURATION mode redundancy protocol lacp • Configure all spanning tree types to be hitless. CONFIGURATION mode redundancy protocol xstp Example of Configuring all Spanning Tree Types to be Hitless Dell(conf)#redundancy protocol xstp Dell#show running-config redundancy ! redundancy protocol xstp Dell# Spanning Tree Protocol (STP) 927
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