Users Guide

53 Storm Control............................................................................................................831
Congure Storm Control.................................................................................................................................................831
Conguring Storm Control from INTERFACE Mode..................................................................................................831
Conguring Storm Control from CONFIGURATION Mode........................................................................................831
54 Spanning Tree Protocol (STP)...................................................................................832
Protocol Overview......................................................................................................................................................... 832
Congure Spanning Tree................................................................................................................................................ 832
Related Conguration Tasks..................................................................................................................................... 832
Important Points to Remember......................................................................................................................................832
Conguring Interfaces for Layer 2 Mode........................................................................................................................833
Enabling Spanning Tree Protocol Globally.......................................................................................................................834
Adding an Interface to the Spanning Tree Group............................................................................................................836
Modifying Global Parameters......................................................................................................................................... 836
Modifying Interface STP Parameters..............................................................................................................................837
Enabling PortFast...........................................................................................................................................................837
Prevent Network Disruptions with BPDU Guard...................................................................................................... 838
Selecting STP Root........................................................................................................................................................840
STP Root Guard.............................................................................................................................................................840
Root Guard Scenario................................................................................................................................................840
Conguring Root Guard............................................................................................................................................ 841
Enabling SNMP Traps for Root Elections and Topology Changes................................................................................... 842
Conguring Spanning Trees as Hitless............................................................................................................................842
STP Loop Guard.............................................................................................................................................................842
Conguring Loop Guard........................................................................................................................................... 843
Displaying STP Guard Conguration...............................................................................................................................844
55 System Time and Date.............................................................................................. 845
Network Time Protocol..................................................................................................................................................845
Protocol Overview................................................................................................................................................... 846
Congure the Network Time Protocol......................................................................................................................846
Enabling NTP........................................................................................................................................................... 846
Conguring NTP Broadcasts....................................................................................................................................847
Disabling NTP on an Interface.................................................................................................................................. 847
Conguring a Source IP Address for NTP Packets................................................................................................... 847
Conguring NTP Authentication.............................................................................................................................. 848
Dell Networking OS Time and Date................................................................................................................................850
Conguration Task List ............................................................................................................................................850
Setting the Time and Date for the Switch Software Clock........................................................................................851
Setting the Timezone................................................................................................................................................851
Set Daylight Saving Time.......................................................................................................................................... 851
Setting Daylight Saving Time Once.......................................................................................................................... 852
Setting Recurring Daylight Saving Time................................................................................................................... 852
56 Tunneling.................................................................................................................. 854
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