Concept Guide

Important Points to Remember.................................................................................................................................... 951
Conguring Interfaces for Layer 2 Mode....................................................................................................................952
Enabling Spanning Tree Protocol Globally.................................................................................................................. 953
Adding an Interface to the Spanning Tree Group......................................................................................................955
Modifying Global Parameters.......................................................................................................................................955
Modifying Interface STP Parameters..........................................................................................................................956
Enabling PortFast.......................................................................................................................................................... 956
Prevent Network Disruptions with BPDU Guard.................................................................................................957
Selecting STP Root....................................................................................................................................................... 959
STP Root Guard.............................................................................................................................................................959
Root Guard Scenario...............................................................................................................................................959
Conguring Root Guard..........................................................................................................................................960
Enabling SNMP Traps for Root Elections and Topology Changes........................................................................... 961
Conguring Spanning Trees as Hitless.........................................................................................................................961
STP Loop Guard............................................................................................................................................................. 961
Conguring Loop Guard..........................................................................................................................................963
Displaying STP Guard Conguration........................................................................................................................... 963
53 SupportAssist..........................................................................................................................................965
Conguring SupportAssist Using a Conguration Wizard........................................................................................966
Conguring SupportAssist Manually...........................................................................................................................966
Conguring SupportAssist Activity............................................................................................................................. 968
Conguring SupportAssist Company..........................................................................................................................969
Conguring SupportAssist Person...............................................................................................................................970
Conguring SupportAssist Server............................................................................................................................... 970
Viewing SupportAssist Conguration...........................................................................................................................971
54 System Time and Date............................................................................................................................. 973
Network Time Protocol................................................................................................................................................. 973
Protocol Overview................................................................................................................................................... 974
Congure the Network Time Protocol.................................................................................................................. 974
Enabling NTP............................................................................................................................................................975
Conguring NTP Broadcasts..................................................................................................................................975
Disabling NTP on an Interface................................................................................................................................976
Conguring a Source IP Address for NTP Packets............................................................................................. 976
Conguring NTP Authentication............................................................................................................................976
Conguring NTP control key password................................................................................................................ 979
Conguring a Custom-dened Period for NTP time Synchronization.............................................................. 979
Dell EMC Networking OS Time and Date...................................................................................................................979
Conguration Task List ...........................................................................................................................................979
Setting the Time and Date for the Switch Software Clock................................................................................979
Setting the Timezone..............................................................................................................................................980
Set Daylight Saving Time........................................................................................................................................980
Setting Daylight Saving Time Once.......................................................................................................................980
Setting Recurring Daylight Saving Time................................................................................................................ 981
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