46 Spanning Tree Protocol (STP)..................................................................... 808
Protocol Overview............................................................................................................................808
Configure Spanning Tree.................................................................................................................808
Related Configuration Tasks...................................................................................................... 808
Important Points to Remember.......................................................................................................809
Configuring Interfaces for Layer 2 Mode........................................................................................ 809
Enabling Spanning Tree Protocol Globally......................................................................................810
Adding an Interface to the Spanning Tree Group............................................................................812
Modifying Global Parameters........................................................................................................... 813
Modifying Interface STP Parameters................................................................................................814
Enabling PortFast.............................................................................................................................. 814
Prevent Network Disruptions with BPDU Guard........................................................................815
Selecting STP Root............................................................................................................................817
STP Root Guard.................................................................................................................................818
Root Guard Scenario...................................................................................................................818
Configuring Root Guard............................................................................................................. 819
Enabling SNMP Traps for Root Elections and Topology Changes.................................................820
Configuring Spanning Trees as Hitless............................................................................................820
STP Loop Guard................................................................................................................................ 821
Configuring Loop Guard.............................................................................................................822
Displaying STP Guard Configuration............................................................................................... 823
47 System Time and Date.................................................................................. 824
Network Time Protocol....................................................................................................................824
Protocol Overview...................................................................................................................... 825
Configure the Network Time Protocol......................................................................................826
Enabling NTP...............................................................................................................................826
Setting the Hardware Clock with the Time Derived from NTP.................................................826
Configuring NTP Broadcasts...................................................................................................... 827
Disabling NTP on an Interface....................................................................................................827
Configuring a Source IP Address for NTP Packets.................................................................... 827
Configuring NTP Authentication................................................................................................828
Dell Networking OS Time and Date................................................................................................. 831
Configuration Task List ...............................................................................................................831
Setting the Time and Date for the Switch Hardware Clock...................................................... 831
Setting the Time and Date for the Switch Software Clock........................................................831
Setting the Timezone..................................................................................................................832
Set Daylight Saving Time............................................................................................................ 832
Setting Daylight Saving Time Once............................................................................................832
Setting Recurring Daylight Saving Time.....................................................................................833
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