Administrator Guide

49 Spanning Tree Protocol (STP)................................................................................................................. 865
Protocol Overview.........................................................................................................................................................865
Congure Spanning Tree.............................................................................................................................................. 866
Related Conguration Tasks...................................................................................................................................866
Important Points to Remember................................................................................................................................... 866
Conguring Interfaces for Layer 2 Mode....................................................................................................................867
Enabling Spanning Tree Protocol Globally...................................................................................................................868
Adding an Interface to the Spanning Tree Group.......................................................................................................870
Modifying Global Parameters....................................................................................................................................... 870
Modifying Interface STP Parameters...........................................................................................................................871
Enabling PortFast...........................................................................................................................................................872
Prevent Network Disruptions with BPDU Guard................................................................................................. 872
Selecting STP Root........................................................................................................................................................874
STP Root Guard............................................................................................................................................................. 874
Root Guard Scenario............................................................................................................................................... 875
Conguring Root Guard.......................................................................................................................................... 875
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................876
Conguring Spanning Trees as Hitless........................................................................................................................ 876
STP Loop Guard............................................................................................................................................................. 877
Conguring Loop Guard.......................................................................................................................................... 878
Displaying STP Guard Conguration............................................................................................................................879
50 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
51 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
Conguring a Custom-dened Period for NTP time Synchronization..............................................................894
Dell 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..............................................................................................................................................895
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