Owners Manual

Modifying Interface STP Parameters................................................................................................ 921
Enabling PortFast...............................................................................................................................921
Prevent Network Disruptions with BPDU Guard....................................................................... 922
Selecting STP Root........................................................................................................................... 924
STP Root Guard................................................................................................................................ 925
Root Guard Scenario.................................................................................................................. 925
Configuring Root Guard.............................................................................................................926
Enabling SNMP Traps for Root Elections and Topology Changes................................................. 927
Configuring Spanning Trees as Hitless............................................................................................ 927
STP Loop Guard................................................................................................................................928
Configuring Loop Guard............................................................................................................ 929
Displaying STP Guard Configuration............................................................................................... 930
54 System Time and Date...................................................................................931
Network Time Protocol.................................................................................................................... 931
Protocol Overview...................................................................................................................... 932
Configure the Network Time Protocol...................................................................................... 933
Enabling NTP...............................................................................................................................933
Setting the Hardware Clock with the Time Derived from NTP.................................................933
Configuring NTP Broadcasts......................................................................................................934
Disabling NTP on an Interface....................................................................................................934
Configuring a Source IP Address for NTP Packets....................................................................934
Configuring NTP Authentication................................................................................................935
Dell Networking OS Time and Date.................................................................................................938
Configuration Task List ..............................................................................................................938
Setting the Time and Date for the Switch Hardware Clock......................................................938
Setting the Time and Date for the Switch Software Clock....................................................... 938
Setting the Timezone..................................................................................................................939
Set Daylight Saving Time............................................................................................................ 939
Setting Daylight Saving Time Once............................................................................................939
Setting Recurring Daylight Saving Time.................................................................................... 940
55 Tunneling ........................................................................................................942
Configuring a Tunnel........................................................................................................................942
Configuring Tunnel Keepalive Settings............................................................................................943
Configuring a Tunnel Interface........................................................................................................944
Configuring Tunnel allow-remote Decapsulation..........................................................................944
Configuring Tunnel source anylocal Decapsulation.......................................................................945
56 Uplink Failure Detection (UFD)................................................................... 946
Feature Description.......................................................................................................................... 946
How Uplink Failure Detection Works...............................................................................................947