Administrator Guide

Table Of Contents
Configuring Spanning Trees as Hitless...................................................................................................................... 686
STP Loop Guard..............................................................................................................................................................686
Configuring Loop Guard.......................................................................................................................................... 687
Displaying STP Guard Configuration.......................................................................................................................... 688
Chapter 49: System Time and Date............................................................................................689
Network Time Protocol................................................................................................................................................. 689
Protocol Overview....................................................................................................................................................690
Configure the Network Time Protocol................................................................................................................ 690
Enabling NTP............................................................................................................................................................. 690
Configuring NTP Broadcasts.................................................................................................................................. 691
Disabling NTP on an Interface................................................................................................................................ 691
Configuring a Source IP Address for NTP Packets...........................................................................................691
Configuring NTP Authentication........................................................................................................................... 692
Dell Networking OS Time and Date............................................................................................................................694
Configuration Task List .......................................................................................................................................... 694
Setting the Time and Date for the Switch Software Clock............................................................................694
Setting the Timezone...............................................................................................................................................694
Set Daylight Saving Time........................................................................................................................................695
Setting Daylight Saving Time Once......................................................................................................................695
Setting Recurring Daylight Saving Time..............................................................................................................696
Chapter 50: Tunneling .............................................................................................................. 698
Configuring a Tunnel...................................................................................................................................................... 698
Configuring Tunnel Keepalive Settings......................................................................................................................699
Configuring a Tunnel Interface....................................................................................................................................699
Configuring Tunnel allow-remote Decapsulation.....................................................................................................700
Configuring Tunnel source anylocal Decapsulation................................................................................................ 700
Guidelines for Configuring Multipoint Receive-Only Tunnels................................................................................701
Multipoint Receive-Only Type and IP Unnumbered Interfaces for Tunnels...................................................... 701
Chapter 51: Upgrade Procedures............................................................................................... 702
Chapter 52: Virtual LANs (VLANs)............................................................................................. 703
Default VLAN................................................................................................................................................................... 703
Port-Based VLANs..........................................................................................................................................................704
VLANs and Port Tagging...............................................................................................................................................704
Configuration Task List..................................................................................................................................................705
Creating a Port-Based VLAN................................................................................................................................. 705
Assigning Interfaces to a VLAN.............................................................................................................................706
Moving Untagged Interfaces..................................................................................................................................707
Assigning an IP Address to a VLAN...................................................................................................................... 708
Configuring Native VLANs............................................................................................................................................708
Enabling Null VLAN as the Default VLAN................................................................................................................. 709
Chapter 53: Virtual Link Trunking (VLT).....................................................................................710
Overview............................................................................................................................................................................710
VLT on Core Switches...............................................................................................................................................711
Enhanced VLT............................................................................................................................................................. 711
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