Users Guide

Protocol Overview.........................................................................................................................................................864
Congure Spanning Tree.............................................................................................................................................. 865
Related Conguration Tasks...................................................................................................................................865
Important Points to Remember................................................................................................................................... 865
Conguring Interfaces for Layer 2 Mode....................................................................................................................866
Enabling Spanning Tree Protocol Globally...................................................................................................................867
Adding an Interface to the Spanning Tree Group...................................................................................................... 869
Modifying Global Parameters.......................................................................................................................................869
Modifying Interface STP Parameters.......................................................................................................................... 870
Enabling PortFast........................................................................................................................................................... 871
Prevent Network Disruptions with BPDU Guard..................................................................................................871
Selecting STP Root........................................................................................................................................................873
STP Root Guard.............................................................................................................................................................873
Root Guard Scenario................................................................................................................................................874
Conguring Root Guard.......................................................................................................................................... 874
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................875
Conguring Spanning Trees as Hitless........................................................................................................................ 875
STP Loop Guard.............................................................................................................................................................876
Conguring Loop Guard.......................................................................................................................................... 877
Displaying STP Guard Conguration............................................................................................................................878
50 SupportAssist.......................................................................................................................................... 879
Conguring SupportAssist Using a Conguration Wizard........................................................................................880
Conguring SupportAssist Manually...........................................................................................................................880
Conguring SupportAssist Activity............................................................................................................................. 882
Conguring SupportAssist Company..........................................................................................................................883
Conguring SupportAssist Person.............................................................................................................................. 884
Conguring SupportAssist Server...............................................................................................................................884
Viewing SupportAssist Conguration......................................................................................................................... 885
51 System Time and Date..............................................................................................................................887
Network Time Protocol................................................................................................................................................. 887
Protocol Overview...................................................................................................................................................888
Congure the Network Time Protocol..................................................................................................................888
Enabling NTP........................................................................................................................................................... 889
Conguring NTP Broadcasts................................................................................................................................. 889
Disabling NTP on an Interface............................................................................................................................... 890
Conguring a Source IP Address for NTP Packets.............................................................................................890
Conguring NTP Authentication........................................................................................................................... 890
Conguring a Custom-dened Period for NTP time Synchronization..............................................................893
Dell Networking OS Time and Date.............................................................................................................................893
Conguration Task List ...........................................................................................................................................893
Setting the Time and Date for the Switch Software Clock................................................................................893
Setting the Timezone..............................................................................................................................................894
Set Daylight Saving Time........................................................................................................................................894
Setting Daylight Saving Time Once.......................................................................................................................894
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