Manage VLANs using SNMP............................................................................................................. 769Creating a VLAN.......................................................................................................................... 769Assigning a VLAN Alias................................................................................................................ 770Displaying the Ports in a VLAN................................................................................................... 770Add Tagged and Untagged Ports to a VLAN.............................................................................. 770Managing Overload on Startup......................................................................................................... 771Enabling and Disabling a Port using SNMP...................................................................................... 772Fetch Dynamic MAC Entries using SNMP........................................................................................ 772Deriving Interface Indices................................................................................................................. 774Monitor Port-Channels..................................................................................................................... 775Troubleshooting SNMP Operation................................................................................................... 77646 Storm Control..................................................................................................... 777Configure Storm Control.................................................................................................................. 777Configuring Storm Control from INTERFACE Mode..................................................................777Configuring Storm Control from CONFIGURATION Mode.......................................................77747 Spanning Tree Protocol (STP)......................................................................... 779Protocol Overview............................................................................................................................ 779Configure Spanning Tree..................................................................................................................779Related Configuration Tasks....................................................................................................... 779Important Points to Remember....................................................................................................... 780Configuring Interfaces for Layer 2 Mode.........................................................................................780Enabling Spanning Tree Protocol Globally...................................................................................... 781Adding an Interface to the Spanning Tree Group........................................................................... 783Modifying Global Parameters........................................................................................................... 784Modifying Interface STP Parameters................................................................................................ 785Enabling PortFast.............................................................................................................................. 785Prevent Network Disruptions with BPDU Guard....................................................................... 786Selecting STP Root........................................................................................................................... 788STP Root Guard................................................................................................................................ 789Root Guard Scenario.................................................................................................................. 789Configuring Root Guard............................................................................................................. 790Enabling SNMP Traps for Root Elections and Topology Changes..................................................791Configuring Spanning Trees as Hitless.............................................................................................791STP Loop Guard................................................................................................................................ 792Configuring Loop Guard.............................................................................................................793Displaying STP Guard Configuration............................................................................................... 79448 System Time and Date...................................................................................... 795Network Time Protocol.................................................................................................................... 795Protocol Overview...................................................................................................................... 796
