Reference Guide

Configuring Storm Control from CONFIGURATION Mode...................................................... 915
53 Spanning Tree Protocol (STP)......................................................................... 917
Protocol Overview.............................................................................................................................917
Configure Spanning Tree..................................................................................................................917
Related Configuration Tasks....................................................................................................... 917
Important Points to Remember........................................................................................................918
Configuring Interfaces for Layer 2 Mode.........................................................................................918
Enabling Spanning Tree Protocol Globally...................................................................................... 919
Adding an Interface to the Spanning Tree Group............................................................................921
Modifying Global Parameters...........................................................................................................922
Modifying Interface STP Parameters................................................................................................923
Enabling PortFast.............................................................................................................................. 923
Prevent Network Disruptions with BPDU Guard....................................................................... 924
Selecting STP Root........................................................................................................................... 926
STP Root Guard.................................................................................................................................927
Root Guard Scenario...................................................................................................................927
Configuring Root Guard.............................................................................................................928
Enabling SNMP Traps for Root Elections and Topology Changes.................................................929
Configuring Spanning Trees as Hitless............................................................................................ 929
STP Loop Guard................................................................................................................................930
Configuring Loop Guard.............................................................................................................931
Displaying STP Guard Configuration............................................................................................... 932
54 System Time and Date...................................................................................... 933
Network Time Protocol....................................................................................................................933
Protocol Overview......................................................................................................................934
Configure the Network Time Protocol...................................................................................... 935
Enabling NTP...............................................................................................................................935
Setting the Hardware Clock with the Time Derived from NTP.................................................936
Configuring NTP Broadcasts......................................................................................................936
Disabling NTP on an Interface....................................................................................................936
Configuring a Source IP Address for NTP Packets....................................................................936
Configuring NTP Authentication................................................................................................ 937
Dell Networking OS Time and Date.................................................................................................939
Configuration Task List ..............................................................................................................939
Setting the Time and Date for the Switch Hardware Clock......................................................940
Setting the Time and Date for the Switch Software Clock.......................................................940
Setting the Timezone..................................................................................................................941
Set Daylight Saving Time.............................................................................................................941
Setting Daylight Saving Time Once............................................................................................941
Setting Recurring Daylight Saving Time.....................................................................................942