Concept Guide

Selecting STP Root......................................................................................................................................................1023
STP Root Guard........................................................................................................................................................... 1023
Root Guard Scenario..............................................................................................................................................1023
Conguring Root Guard.........................................................................................................................................1024
Enabling SNMP Traps for Root Elections and Topology Changes......................................................................... 1025
STP Loop Guard...........................................................................................................................................................1025
Conguring Loop Guard........................................................................................................................................ 1026
Displaying STP Guard Conguration.......................................................................................................................... 1027
56 SupportAssist.........................................................................................................................................1028
Conguring SupportAssist Using a Conguration Wizard...................................................................................... 1029
Conguring SupportAssist Manually..........................................................................................................................1029
Conguring SupportAssist Activity.............................................................................................................................1031
Conguring SupportAssist Company.........................................................................................................................1032
Conguring SupportAssist Person.............................................................................................................................1033
Conguring SupportAssist Server..............................................................................................................................1033
Viewing SupportAssist Conguration........................................................................................................................ 1034
57 System Time and Date............................................................................................................................1036
Network Time Protocol............................................................................................................................................... 1036
Protocol Overview..................................................................................................................................................1037
Congure the Network Time Protocol.................................................................................................................1037
Enabling NTP.......................................................................................................................................................... 1038
Conguring NTP Broadcasts................................................................................................................................1038
Disabling NTP on an Interface.............................................................................................................................. 1038
Conguring a Source IP Address for NTP Packets............................................................................................1039
Conguring NTP Authentication.......................................................................................................................... 1039
Conguring NTP control key password............................................................................................................... 1041
Time and Date.............................................................................................................................................................. 1042
Conguration Task List .........................................................................................................................................1042
Setting the Time and Date for the Switch Software Clock..............................................................................1042
Setting the Timezone............................................................................................................................................ 1042
Set Daylight Saving Time...................................................................................................................................... 1043
Setting Daylight Saving Time Once..................................................................................................................... 1043
Setting Recurring Daylight Saving Time..............................................................................................................1044
Conguring a Custom-dened Period for NTP time Synchronization............................................................ 1045
58 Tunneling ...............................................................................................................................................1046
Conguring a Tunnel....................................................................................................................................................1046
Conguring Tunnel Keepalive Settings...................................................................................................................... 1047
Conguring a Tunnel Interface....................................................................................................................................1047
Conguring Tunnel allow-remote Decapsulation...................................................................................................... 1048
Conguring Tunnel source anylocal Decapsulation.................................................................................................. 1048
Multipoint Receive-Only Tunnels................................................................................................................................1048
Guidelines for Conguring Multipoint Receive-Only Tunnels............................................................................1049
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