Administrator Guide

STP Root Guard.............................................................................................................................................................923
Root Guard Scenario............................................................................................................................................... 923
Conguring Root Guard..........................................................................................................................................924
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................925
Conguring Spanning Trees as Hitless........................................................................................................................925
STP Loop Guard.............................................................................................................................................................925
Conguring Loop Guard.......................................................................................................................................... 927
Displaying STP Guard Conguration............................................................................................................................927
54 SupportAssist.......................................................................................................................................... 929
Conguring SupportAssist Using a Conguration Wizard........................................................................................930
Conguring SupportAssist Manually........................................................................................................................... 930
Conguring SupportAssist Activity............................................................................................................................. 932
Conguring SupportAssist Company..........................................................................................................................933
Conguring SupportAssist Person.............................................................................................................................. 934
Conguring SupportAssist Server...............................................................................................................................934
Viewing SupportAssist Conguration......................................................................................................................... 935
55 System Time and Date.............................................................................................................................937
Network Time Protocol................................................................................................................................................. 937
Protocol Overview...................................................................................................................................................938
Congure the Network Time Protocol..................................................................................................................938
Enabling NTP............................................................................................................................................................939
Conguring NTP Broadcasts................................................................................................................................. 939
Disabling NTP on an Interface............................................................................................................................... 940
Conguring a Source IP Address for NTP Packets.............................................................................................940
Conguring NTP Authentication........................................................................................................................... 940
Dell Networking OS Time and Date.............................................................................................................................943
Conguration Task List ...........................................................................................................................................943
Setting the Time and Date for the Switch Software Clock................................................................................943
Setting the Timezone..............................................................................................................................................943
Set Daylight Saving Time........................................................................................................................................944
Setting Daylight Saving Time Once.......................................................................................................................944
Setting Recurring Daylight Saving Time............................................................................................................... 945
56 Tunneling................................................................................................................................................. 947
Conguring a Tunnel......................................................................................................................................................947
Conguring Tunnel Keepalive Settings........................................................................................................................948
Conguring a Tunnel Interface.....................................................................................................................................948
Conguring Tunnel Allow-Remote Decapsulation......................................................................................................949
Conguring the Tunnel Source Anylocal.....................................................................................................................949
57 Uplink Failure Detection (UFD)................................................................................................................. 951
Feature Description........................................................................................................................................................ 951
How Uplink Failure Detection Works...........................................................................................................................952
UFD and NIC Teaming...................................................................................................................................................953
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