Concept Guide

52 Spanning Tree Protocol (STP)................................................................................................................. 962
Protocol Overview.........................................................................................................................................................962
Congure Spanning Tree.............................................................................................................................................. 963
Related Conguration Tasks...................................................................................................................................963
Important Points to Remember................................................................................................................................... 963
Conguring Interfaces for Layer 2 Mode....................................................................................................................964
Enabling Spanning Tree Protocol Globally.................................................................................................................. 965
Adding an Interface to the Spanning Tree Group...................................................................................................... 967
Modifying Global Parameters....................................................................................................................................... 967
Modifying Interface STP Parameters..........................................................................................................................968
Enabling PortFast.......................................................................................................................................................... 968
Prevent Network Disruptions with BPDU Guard.................................................................................................969
Selecting STP Root........................................................................................................................................................ 971
STP Root Guard..............................................................................................................................................................971
Root Guard Scenario................................................................................................................................................ 971
Conguring Root Guard.......................................................................................................................................... 972
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................973
Conguring Spanning Trees as Hitless........................................................................................................................ 973
STP Loop Guard.............................................................................................................................................................973
Conguring Loop Guard..........................................................................................................................................975
Displaying STP Guard Conguration........................................................................................................................... 975
53 SupportAssist.......................................................................................................................................... 977
Conguring SupportAssist Using a Conguration Wizard........................................................................................ 978
Conguring SupportAssist Manually........................................................................................................................... 978
Conguring SupportAssist Activity............................................................................................................................. 980
Conguring SupportAssist Company...........................................................................................................................981
Conguring SupportAssist Person.............................................................................................................................. 982
Conguring SupportAssist Server...............................................................................................................................982
Viewing SupportAssist Conguration..........................................................................................................................983
54 System Time and Date.............................................................................................................................985
Network Time Protocol.................................................................................................................................................985
Protocol Overview...................................................................................................................................................986
Congure the Network Time Protocol..................................................................................................................986
Enabling NTP............................................................................................................................................................987
Conguring NTP Broadcasts..................................................................................................................................987
Disabling NTP on an Interface................................................................................................................................988
Conguring a Source IP Address for NTP Packets.............................................................................................988
Conguring NTP Authentication........................................................................................................................... 988
Conguring NTP control key password.................................................................................................................991
Conguring a Custom-dened Period for NTP time Synchronization...............................................................991
Dell EMC Networking OS Time and Date....................................................................................................................991
Conguration Task List ........................................................................................................................................... 991
Setting the Time and Date for the Switch Software Clock................................................................................ 991
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