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STP Root Guard.............................................................................................................................................................875
Root Guard Scenario............................................................................................................................................... 875
Conguring Root Guard.......................................................................................................................................... 876
Enabling SNMP Traps for Root Elections and Topology Changes........................................................................... 877
Conguring Spanning Trees as Hitless........................................................................................................................ 877
STP Loop Guard............................................................................................................................................................. 877
Conguring Loop Guard.......................................................................................................................................... 878
Displaying STP Guard Conguration............................................................................................................................879
53 SupportAssist..........................................................................................................................................880
Conguring SupportAssist Using a Conguration Wizard.........................................................................................881
Conguring SupportAssist Manually............................................................................................................................881
Conguring SupportAssist Activity............................................................................................................................. 883
Conguring SupportAssist Company..........................................................................................................................884
Conguring SupportAssist Person.............................................................................................................................. 885
Conguring SupportAssist Server...............................................................................................................................885
Viewing SupportAssist Conguration......................................................................................................................... 886
54 System Time and Date.............................................................................................................................888
Network Time Protocol.................................................................................................................................................888
Protocol Overview...................................................................................................................................................889
Congure the Network Time Protocol..................................................................................................................889
Enabling NTP........................................................................................................................................................... 890
Conguring NTP Broadcasts................................................................................................................................. 890
Disabling NTP on an Interface................................................................................................................................ 891
Conguring a Source IP Address for NTP Packets..............................................................................................891
Conguring NTP Authentication............................................................................................................................ 891
Dell EMC Networking OS Time and Date...................................................................................................................894
Conguration Task List ...........................................................................................................................................894
Setting the Time and Date for the Switch Software Clock................................................................................894
Setting the Timezone..............................................................................................................................................894
Set Daylight Saving Time........................................................................................................................................895
Setting Daylight Saving Time Once.......................................................................................................................895
Setting Recurring Daylight Saving Time............................................................................................................... 896
Conguring a Custom-dened Period for NTP time Synchronization.............................................................. 897
55 Tunneling................................................................................................................................................. 898
Conguring a Tunnel......................................................................................................................................................898
Conguring Tunnel Keepalive Settings........................................................................................................................899
Conguring a Tunnel Interface.....................................................................................................................................899
Conguring Tunnel Allow-Remote Decapsulation......................................................................................................900
Conguring the Tunnel Source Anylocal.....................................................................................................................900
56 Uplink Failure Detection (UFD)................................................................................................................ 902
Feature Description....................................................................................................................................................... 902
How Uplink Failure Detection Works...........................................................................................................................903
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