Administrator Guide

Enabling Spanning Tree Protocol Globally................................................................................................................ 953
Adding an Interface to the Spanning Tree Group...................................................................................................954
Modifying Global Parameters.......................................................................................................................................955
Modifying Interface STP Parameters........................................................................................................................ 956
Enabling PortFast........................................................................................................................................................... 956
Prevent Network Disruptions with BPDU Guard.................................................................................................... 957
Selecting STP Root........................................................................................................................................................ 958
STP Root Guard..............................................................................................................................................................959
Root Guard Scenario................................................................................................................................................959
Configuring Root Guard.......................................................................................................................................... 960
Enabling SNMP Traps for Root Elections and Topology Changes..................................................................... 960
STP Loop Guard..............................................................................................................................................................960
Configuring Loop Guard........................................................................................................................................... 961
Displaying STP Guard Configuration.......................................................................................................................... 962
Chapter 56: SupportAssist........................................................................................................ 963
Configuring SupportAssist Using a Configuration Wizard.................................................................................... 964
Configuring SupportAssist Manually.......................................................................................................................... 964
Configuring SupportAssist Activity............................................................................................................................ 966
Configuring SupportAssist Company......................................................................................................................... 967
Configuring SupportAssist Person..............................................................................................................................968
Configuring SupportAssist Server.............................................................................................................................. 968
Viewing SupportAssist Configuration........................................................................................................................ 969
Chapter 57: System Time and Date............................................................................................ 971
Network Time Protocol.................................................................................................................................................. 971
Protocol Overview.................................................................................................................................................... 972
Configure the Network Time Protocol.................................................................................................................972
Enabling NTP..............................................................................................................................................................972
Configuring NTP Broadcasts..................................................................................................................................973
Disabling NTP on an Interface................................................................................................................................973
Configuring a Source IP Address for NTP Packets.......................................................................................... 973
Configuring NTP Authentication........................................................................................................................... 974
Configuring NTP control key password...............................................................................................................976
Configuring the NTP Step-Threshold.................................................................................................................. 976
Time and Date..................................................................................................................................................................976
Configuration Task List ...........................................................................................................................................976
Setting the Time and Date for the Switch Software Clock............................................................................ 977
Setting the Timezone............................................................................................................................................... 977
Set Daylight Saving Time........................................................................................................................................ 978
Setting Daylight Saving Time Once...................................................................................................................... 978
Setting Recurring Daylight Saving Time.............................................................................................................. 978
Configuring a Custom-defined Period for NTP time Synchronization......................................................... 979
Chapter 58: Tunneling ...............................................................................................................981
Configuring a Tunnel.......................................................................................................................................................981
Configuring Tunnel Keepalive Settings......................................................................................................................982
Configuring a Tunnel Interface.................................................................................................................................... 982
Configuring Tunnel allow-remote Decapsulation.....................................................................................................983
28
Contents