Reference Guide

Table Of Contents
Recover from a Card Problem State on a Stack...............................................................................................935
Chapter 55: Storm Control........................................................................................................ 936
Configure Storm Control...............................................................................................................................................936
Configuring Storm Control from INTERFACE Mode........................................................................................936
Configuring Storm Control from CONFIGURATION Mode.............................................................................937
Chapter 56: Spanning Tree Protocol (STP)............................................................................... 938
Protocol Overview..........................................................................................................................................................938
Configure Spanning Tree.............................................................................................................................................. 938
Important Points to Remember...................................................................................................................................939
Configuring Interfaces for Layer 2 Mode..................................................................................................................940
Enabling Spanning Tree Protocol Globally................................................................................................................. 941
Adding an Interface to the Spanning Tree Group...................................................................................................942
Modifying Global Parameters.......................................................................................................................................943
Modifying Interface STP Parameters.........................................................................................................................944
Enabling PortFast............................................................................................................................................................944
Prevent Network Disruptions with BPDU Guard.............................................................................................. 945
Selecting STP Root........................................................................................................................................................ 947
STP Root Guard.............................................................................................................................................................. 947
Root Guard Scenario................................................................................................................................................ 947
Configuring Root Guard...........................................................................................................................................948
Enabling SNMP Traps for Root Elections and Topology Changes..................................................................... 949
Configuring Spanning Trees as Hitless...................................................................................................................... 949
STP Loop Guard..............................................................................................................................................................949
Configuring Loop Guard.......................................................................................................................................... 950
Displaying STP Guard Configuration...........................................................................................................................951
Chapter 57: SupportAssist........................................................................................................ 952
Configuring SupportAssist Using a Configuration Wizard.................................................................................... 952
Configuring SupportAssist Manually.......................................................................................................................... 953
Configuring SupportAssist Activity............................................................................................................................ 954
Configuring SupportAssist Company......................................................................................................................... 956
Configuring SupportAssist Person............................................................................................................................. 956
Configuring SupportAssist Server.............................................................................................................................. 957
Viewing SupportAssist Configuration........................................................................................................................ 958
Chapter 58: System Time and Date........................................................................................... 960
Network Time Protocol................................................................................................................................................. 960
Protocol Overview.....................................................................................................................................................961
Configure the Network Time Protocol................................................................................................................. 961
Enabling NTP.............................................................................................................................................................. 961
Configuring NTP Broadcasts..................................................................................................................................962
Disabling NTP on an Interface............................................................................................................................... 962
Configuring a Source IP Address for NTP Packets.......................................................................................... 962
Configuring NTP Authentication........................................................................................................................... 963
Configuring NTP control key password...............................................................................................................965
Configuring the NTP Step-Threshold.................................................................................................................. 965
Configuring a Custom-defined Period for NTP time Synchronization.........................................................965
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