Users Guide

57 System Time and Date............................................................................................................................1029
Network Time Protocol............................................................................................................................................... 1029
Protocol Overview................................................................................................................................................. 1030
Congure the Network Time Protocol................................................................................................................ 1030
Enabling NTP...........................................................................................................................................................1031
Conguring NTP Broadcasts.................................................................................................................................1031
Disabling NTP on an Interface...............................................................................................................................1031
Conguring a Source IP Address for NTP Packets............................................................................................1032
Conguring NTP Authentication.......................................................................................................................... 1032
Conguring NTP control key password...............................................................................................................1034
Time and Date.............................................................................................................................................................. 1035
Conguration Task List .........................................................................................................................................1035
Setting the Time and Date for the Switch Software Clock..............................................................................1035
Setting the Timezone............................................................................................................................................ 1035
Set Daylight Saving Time...................................................................................................................................... 1036
Setting Daylight Saving Time Once..................................................................................................................... 1036
Setting Recurring Daylight Saving Time.............................................................................................................. 1037
Conguring a Custom-dened Period for NTP time Synchronization............................................................ 1038
58 Tunneling ...............................................................................................................................................1039
Conguring a Tunnel.................................................................................................................................................... 1039
Conguring Tunnel Keepalive Settings......................................................................................................................1040
Conguring a Tunnel Interface................................................................................................................................... 1040
Conguring Tunnel allow-remote Decapsulation.......................................................................................................1041
Conguring Tunnel source anylocal Decapsulation...................................................................................................1041
Multipoint Receive-Only Tunnels................................................................................................................................ 1041
Guidelines for Conguring Multipoint Receive-Only Tunnels............................................................................1042
59 Upgrade Procedures...............................................................................................................................1043
Upgrade OverviewGet Help with Upgrades............................................................................................................. 1043
Bootup and Upgrades..................................................................................................................................................1043
60 Uplink Failure Detection (UFD)...............................................................................................................1044
Feature Description......................................................................................................................................................1044
How Uplink Failure Detection Works......................................................................................................................... 1045
UFD and NIC Teaming................................................................................................................................................. 1046
Important Points to Remember..................................................................................................................................1046
Conguring Uplink Failure Detection..........................................................................................................................1047
Clearing a UFD-Disabled Interface.............................................................................................................................1048
Displaying Uplink Failure Detection............................................................................................................................ 1049
Sample Conguration: Uplink Failure Detection........................................................................................................1051
61 Virtual LANs (VLANs)............................................................................................................................. 1053
Default VLAN................................................................................................................................................................1053
Port-Based VLANs.......................................................................................................................................................1054
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