Users Guide

Congure Spanning Tree...............................................................................................................................................825
Related Conguration Tasks................................................................................................................................... 826
Important Points to Remember................................................................................................................................... 826
Conguring Interfaces for Layer 2 Mode....................................................................................................................827
Enabling Spanning Tree Protocol Globally...................................................................................................................828
Adding an Interface to the Spanning Tree Group...................................................................................................... 830
Modifying Global Parameters....................................................................................................................................... 830
Modifying Interface STP Parameters...........................................................................................................................831
Enabling PortFast.......................................................................................................................................................... 832
Prevent Network Disruptions with BPDU Guard.................................................................................................833
Selecting STP Root....................................................................................................................................................... 835
STP Root Guard.............................................................................................................................................................835
Root Guard Scenario...............................................................................................................................................835
Conguring Root Guard..........................................................................................................................................836
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................837
Conguring Spanning Trees as Hitless........................................................................................................................ 837
STP Loop Guard.............................................................................................................................................................837
Conguring Loop Guard..........................................................................................................................................838
Displaying STP Guard Conguration........................................................................................................................... 839
51 SupportAssist...........................................................................................................................................840
Conguring SupportAssist Using a Conguration Wizard.........................................................................................841
Conguring SupportAssist Manually............................................................................................................................841
Conguring SupportAssist Activity............................................................................................................................. 843
Conguring SupportAssist Company..........................................................................................................................844
Conguring SupportAssist Person.............................................................................................................................. 844
Conguring SupportAssist Server...............................................................................................................................845
Viewing SupportAssist Conguration..........................................................................................................................846
52 System Time and Date............................................................................................................................. 848
Network Time Protocol.................................................................................................................................................848
Protocol Overview...................................................................................................................................................849
Congure the Network Time Protocol..................................................................................................................850
Enabling NTP........................................................................................................................................................... 850
Conguring NTP Broadcasts.................................................................................................................................. 851
Disabling NTP on an Interface................................................................................................................................ 851
Conguring a Source IP Address for NTP Packets..............................................................................................851
Conguring NTP Authentication............................................................................................................................852
Conguring a Custom-dened Period for NTP time Synchronization..............................................................854
Dell Networking OS Time and Date.............................................................................................................................855
Conguration Task List .......................................................................................................................................... 855
Setting the Time and Date for the Switch Software Clock............................................................................... 855
Setting the Timezone..............................................................................................................................................855
Set Daylight Saving Time........................................................................................................................................856
Setting Daylight Saving Time Once.......................................................................................................................856
Setting Recurring Daylight Saving Time............................................................................................................... 856
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