Users Guide

51 Storm Control.......................................................................................................................................... 834
Configure Storm Control.............................................................................................................................................. 834
Configuring Storm Control from INTERFACE Mode..........................................................................................834
Configuring Storm Control from CONFIGURATION Mode............................................................................... 835
52 Spanning Tree Protocol (STP)................................................................................................................ 836
Protocol Overview.........................................................................................................................................................836
Configure Spanning Tree..............................................................................................................................................837
Related Configuration Tasks.................................................................................................................................. 837
Important Points to Remember................................................................................................................................... 837
Configuring Interfaces for Layer 2 Mode................................................................................................................... 838
Enabling Spanning Tree Protocol Globally..................................................................................................................839
Adding an Interface to the Spanning Tree Group...................................................................................................... 841
Modifying Global Parameters........................................................................................................................................841
Modifying Interface STP Parameters......................................................................................................................... 842
Enabling PortFast.......................................................................................................................................................... 842
Prevent Network Disruptions with BPDU Guard................................................................................................ 843
Selecting STP Root....................................................................................................................................................... 844
STP Root Guard............................................................................................................................................................ 845
Root Guard Scenario...............................................................................................................................................845
Configuring Root Guard..........................................................................................................................................846
Enabling SNMP Traps for Root Elections and Topology Changes..........................................................................847
Configuring Spanning Trees as Hitless........................................................................................................................847
STP Loop Guard............................................................................................................................................................ 847
Configuring Loop Guard..........................................................................................................................................848
Displaying STP Guard Configuration...........................................................................................................................849
53 SupportAssist..........................................................................................................................................850
Configuring SupportAssist Using a Configuration Wizard........................................................................................ 851
Configuring SupportAssist Manually............................................................................................................................851
Configuring SupportAssist Activity............................................................................................................................. 853
Configuring SupportAssist Company..........................................................................................................................854
Configuring SupportAssist Person..............................................................................................................................855
Configuring SupportAssist Server...............................................................................................................................855
Viewing SupportAssist Configuration......................................................................................................................... 856
54 System Time and Date.............................................................................................................................858
Network Time Protocol................................................................................................................................................ 858
Protocol Overview.................................................................................................................................................. 859
Configure the Network Time Protocol................................................................................................................. 859
Enabling NTP........................................................................................................................................................... 860
Configuring NTP Broadcasts................................................................................................................................. 860
Disabling NTP on an Interface................................................................................................................................ 861
Configuring a Source IP Address for NTP Packets............................................................................................. 861
Configuring NTP Authentication............................................................................................................................ 861
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