Reference Guide

Enabling Spanning Tree Protocol Globally........................................................................................................... 671
Adding an Interface to the Spanning Tree Group.................................................................................................673
Modifying Global Parameters...............................................................................................................................674
Modifying Interface STP Parameters...................................................................................................................675
Enabling PortFast..................................................................................................................................................675
Prevent Network Disruptions with BPDU Guard............................................................................................676
Selecting STP Root............................................................................................................................................... 678
STP Root Guard.....................................................................................................................................................678
Root Guard Scenario......................................................................................................................................678
Configuring Root Guard..................................................................................................................................679
Enabling SNMP Traps for Root Elections and Topology Changes....................................................................... 680
Configuring Spanning Trees as Hitless.................................................................................................................680
STP Loop Guard.................................................................................................................................................... 681
Configuring Loop Guard................................................................................................................................. 682
Displaying STP Guard Configuration.................................................................................................................... 683
45 System Time and Date..........................................................................................................685
Network Time Protocol.........................................................................................................................................685
Protocol Overview..........................................................................................................................................686
Configure the Network Time Protocol............................................................................................................686
Enabling NTP..................................................................................................................................................687
Setting the Hardware Clock with the Time Derived from NTP.......................................................................687
Configuring NTP Broadcasts..........................................................................................................................687
Disabling NTP on an Interface....................................................................................................................... 688
Configuring a Source IP Address for NTP Packets........................................................................................688
Configuring NTP Authentication.................................................................................................................... 689
FTOS Time and Date............................................................................................................................................. 691
Configuration Task List ..................................................................................................................................691
Setting the Time and Date for the Switch Hardware Clock........................................................................... 692
Setting the Time and Date for the Switch Software Clock.............................................................................692
Setting the Timezone......................................................................................................................................692
Set Daylight Saving Time............................................................................................................................... 693
Setting Daylight Saving Time Once................................................................................................................693
Setting Recurring Daylight Saving Time........................................................................................................ 694
46 Tunneling ............................................................................................................................... 697
Configuring a Tunnel.............................................................................................................................................697
47 Upgrade Procedures............................................................................................................ 699
Get Help with Upgrades........................................................................................................................................699
48 Virtual LANs (VLANs)............................................................................................................701