Users Guide

Deriving Interface Indices..............................................................................................................................................773
Monitor Port-Channels..................................................................................................................................................774
Troubleshooting SNMP Operation...............................................................................................................................775
49 Storm Control.......................................................................................................................................... 776
Congure Storm Control...............................................................................................................................................776
Conguring Storm Control from INTERFACE Mode........................................................................................... 776
Conguring Storm Control from CONFIGURATION Mode.................................................................................777
PFC Storm...................................................................................................................................................................... 777
Detect PFC Storm................................................................................................................................................... 778
Restore Queue Drop State......................................................................................................................................778
View Details of Storm Control PFC....................................................................................................................... 778
50 Spanning Tree Protocol (STP)................................................................................................................. 780
Protocol Overview......................................................................................................................................................... 780
Congure Spanning Tree...............................................................................................................................................780
Related Conguration Tasks....................................................................................................................................781
Important Points to Remember.................................................................................................................................... 781
Conguring Interfaces for Layer 2 Mode....................................................................................................................782
Enabling Spanning Tree Protocol Globally...................................................................................................................783
Adding an Interface to the Spanning Tree Group...................................................................................................... 785
Modifying Global Parameters....................................................................................................................................... 785
Modifying Interface STP Parameters.......................................................................................................................... 786
Enabling PortFast...........................................................................................................................................................787
Prevent Network Disruptions with BPDU Guard.................................................................................................788
Selecting STP Root....................................................................................................................................................... 790
STP Root Guard.............................................................................................................................................................790
Root Guard Scenario............................................................................................................................................... 790
Conguring Root Guard...........................................................................................................................................791
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................792
Conguring Spanning Trees as Hitless........................................................................................................................ 792
STP Loop Guard.............................................................................................................................................................792
Conguring Loop Guard..........................................................................................................................................793
Displaying STP Guard Conguration........................................................................................................................... 794
51 SupportAssist...........................................................................................................................................795
Conguring SupportAssist Using a Conguration Wizard........................................................................................ 796
Conguring SupportAssist Manually........................................................................................................................... 796
Conguring SupportAssist Activity..............................................................................................................................798
Conguring SupportAssist Company..........................................................................................................................799
Conguring SupportAssist Person...............................................................................................................................799
Conguring SupportAssist Server...............................................................................................................................800
Viewing SupportAssist Conguration.......................................................................................................................... 801
52 System Time and Date.............................................................................................................................803
Network Time Protocol.................................................................................................................................................803
Protocol Overview...................................................................................................................................................804
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