Reference Guide

Managing Overload on Startup.........................................................................................................815
Enabling and Disabling a Port using SNMP......................................................................................816
Fetch Dynamic MAC Entries using SNMP........................................................................................ 816
Deriving Interface Indices.................................................................................................................818
Monitor Port-Channels.....................................................................................................................819
Troubleshooting SNMP Operation.................................................................................................. 820
45 Storm Control..................................................................................................... 821
Configure Storm Control..................................................................................................................821
Configuring Storm Control from INTERFACE Mode................................................................. 821
Configuring Storm Control from CONFIGURATION Mode...................................................... 821
46 Spanning Tree Protocol (STP)........................................................................ 823
Protocol Overview............................................................................................................................823
Configure Spanning Tree................................................................................................................. 823
Related Configuration Tasks.......................................................................................................823
Important Points to Remember....................................................................................................... 824
Configuring Interfaces for Layer 2 Mode.........................................................................................824
Enabling Spanning Tree Protocol Globally......................................................................................825
Adding an Interface to the Spanning Tree Group........................................................................... 827
Modifying Global Parameters...........................................................................................................828
Modifying Interface STP Parameters................................................................................................829
Enabling PortFast..............................................................................................................................829
Prevent Network Disruptions with BPDU Guard.......................................................................830
Selecting STP Root........................................................................................................................... 832
STP Root Guard................................................................................................................................ 833
Root Guard Scenario.................................................................................................................. 833
Configuring Root Guard.............................................................................................................834
Enabling SNMP Traps for Root Elections and Topology Changes................................................. 835
Configuring Spanning Trees as Hitless............................................................................................ 835
STP Loop Guard................................................................................................................................836
Configuring Loop Guard.............................................................................................................837
Displaying STP Guard Configuration............................................................................................... 838
47 System Time and Date...................................................................................... 839
Network Time Protocol....................................................................................................................839
Protocol Overview......................................................................................................................840
Configure the Network Time Protocol...................................................................................... 841
Enabling NTP...............................................................................................................................841
Setting the Hardware Clock with the Time Derived from NTP.................................................842
Configuring NTP Broadcasts......................................................................................................842
Disabling NTP on an Interface....................................................................................................842