Service Manual

Remove Units or Front End Ports from a Stack..............................................................................................................743
Removing a Unit from an S-Series Stack..................................................................................................................743
Removing Front End Port Stacking.......................................................................................................................... 744
Troubleshoot an S-Series Stack......................................................................................................................................744
Recover from Stack Link Flaps................................................................................................................................. 745
Recover from a Card Problem State on an S-Series Stack....................................................................................... 745
50 Storm Control............................................................................................................747
Congure Storm Control.................................................................................................................................................747
Conguring Storm Control from INTERFACE Mode................................................................................................. 747
Conguring Storm Control from CONFIGURATION Mode........................................................................................747
51 Spanning Tree Protocol (STP)....................................................................................748
Protocol Overview..........................................................................................................................................................748
Congure Spanning Tree................................................................................................................................................ 748
Related Conguration Tasks..................................................................................................................................... 748
Important Points to Remember...................................................................................................................................... 748
Conguring Interfaces for Layer 2 Mode........................................................................................................................ 749
Enabling Spanning Tree Protocol Globally.......................................................................................................................750
Adding an Interface to the Spanning Tree Group............................................................................................................752
Modifying Global Parameters..........................................................................................................................................752
Modifying Interface STP Parameters..............................................................................................................................753
Enabling PortFast...........................................................................................................................................................753
Prevent Network Disruptions with BPDU Guard...................................................................................................... 754
Selecting STP Root........................................................................................................................................................756
STP Root Guard.............................................................................................................................................................756
Root Guard Scenario................................................................................................................................................756
Conguring Root Guard............................................................................................................................................757
Enabling SNMP Traps for Root Elections and Topology Changes................................................................................... 758
Conguring Spanning Trees as Hitless............................................................................................................................758
STP Loop Guard.............................................................................................................................................................758
Conguring Loop Guard........................................................................................................................................... 759
Displaying STP Guard Conguration...............................................................................................................................760
52 System Time and Date............................................................................................... 761
Network Time Protocol...................................................................................................................................................761
Protocol Overview....................................................................................................................................................762
Congure the Network Time Protocol......................................................................................................................762
Enabling NTP........................................................................................................................................................... 762
Conguring NTP Broadcasts....................................................................................................................................763
Disabling NTP on an Interface.................................................................................................................................. 763
Conguring a Source IP Address for NTP Packets................................................................................................... 763
Conguring NTP Authentication...............................................................................................................................764
Dell Networking OS Time and Date................................................................................................................................ 766
Conguration Task List ............................................................................................................................................ 766
Setting the Time and Date for the Switch Software Clock....................................................................................... 767
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