Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.14.1.0 - Page 785

Enabling SNMP Traps for Root Elections and Topology Changes To enable SNMP traps, use the following command. • Enable SNMP traps for RSTP, MSTP, and PVST+ collectively. snmp-server enable traps xstp Modifying Interface Parameters On interfaces in Layer 2 mode, you can set the port cost and port priority values. • Port cost - a value that is based on the interface type. The previous table lists the default values. The greater the port cost, the less likely the port is selected to be a forwarding port. • Port priority - influences the likelihood that a port is selected to be a forwarding port in case that several ports have the same port cost. To change the port cost or priority of an interface, use the following commands. • Change the port cost of an interface. INTERFACE mode spanning-tree rstp cost cost The range is from 0 to 65535. The default is listed in the previous table. • Change the port priority of an interface. INTERFACE mode spanning-tree rstp priority priority-value The range is from 0 to 15. The default is 128. To view the current values for interface parameters, use the show spanning-tree rstp command from EXEC privilege mode. Enabling SNMP Traps for Root Elections and Topology Changes To enable SNMP traps collectively, use this command. Enable SNMP traps for RSTP, MSTP, and PVST+ collectively. snmp-server enable traps xstp Influencing RSTP Root Selection RSTP determines the root bridge, but you can assign one bridge a lower priority to increase the likelihood that it is selected as the root bridge. To change the bridge priority, use the following command. Rapid Spanning Tree Protocol (RSTP) 785