Reference Guide

Adding an Interface to the Spanning Tree Group........................................................................... 816
Modifying Global Parameters........................................................................................................... 817
Modifying Interface STP Parameters................................................................................................818
Enabling PortFast.............................................................................................................................. 818
Prevent Network Disruptions with BPDU Guard........................................................................819
Selecting STP Root............................................................................................................................821
STP Root Guard................................................................................................................................ 822
Root Guard Scenario.................................................................................................................. 822
Configuring Root Guard............................................................................................................. 823
Enabling SNMP Traps for Root Elections and Topology Changes.................................................824
Configuring Spanning Trees as Hitless............................................................................................ 824
STP Loop Guard................................................................................................................................825
Configuring Loop Guard............................................................................................................ 826
Displaying STP Guard Configuration................................................................................................827
47 System Time and Date...................................................................................... 828
Network Time Protocol....................................................................................................................828
Protocol Overview......................................................................................................................829
Configure the Network Time Protocol......................................................................................830
Enabling NTP...............................................................................................................................830
Setting the Hardware Clock with the Time Derived from NTP................................................ 830
Configuring NTP Broadcasts...................................................................................................... 831
Disabling NTP on an Interface.................................................................................................... 831
Configuring a Source IP Address for NTP Packets.....................................................................831
Configuring NTP Authentication................................................................................................832
Dell Networking OS Time and Date.................................................................................................835
Configuration Task List .............................................................................................................. 835
Setting the Time and Date for the Switch Hardware Clock......................................................835
Setting the Time and Date for the Switch Software Clock....................................................... 835
Setting the Timezone................................................................................................................. 836
Set Daylight Saving Time............................................................................................................ 836
Setting Daylight Saving Time Once............................................................................................836
Setting Recurring Daylight Saving Time.....................................................................................837
48 Tunneling ............................................................................................................839
Configuring a Tunnel........................................................................................................................839
Configuring Tunnel Keepalive Settings........................................................................................... 840
Configuring a Tunnel Interface........................................................................................................ 841
Configuring Tunnel allow-remote Decapsulation.......................................................................... 841
Configuring Tunnel source anylocal Decapsulation.......................................................................842
Guidelines for Configuring Multipoint Receive-Only Tunnels....................................................... 842
Multipoint Receive-Only Type and IP Unnumbered Interfaces for Tunnels..................................843