Users Guide

Deriving Interface Indices..............................................................................................................................................777
Monitor Port-Channels..................................................................................................................................................778
Troubleshooting SNMP Operation...............................................................................................................................779
48 Storm Control.......................................................................................................................................... 780
Congure Storm Control...............................................................................................................................................780
Conguring Storm Control from INTERFACE Mode...........................................................................................780
Conguring Storm Control from CONFIGURATION Mode.................................................................................781
PFC Storm.......................................................................................................................................................................781
Detect PFC Storm................................................................................................................................................... 782
Restore Queue Drop State......................................................................................................................................782
View Details of Storm Control PFC....................................................................................................................... 782
49 Spanning Tree Protocol (STP)................................................................................................................. 784
Protocol Overview......................................................................................................................................................... 784
Congure Spanning Tree...............................................................................................................................................784
Related Conguration Tasks................................................................................................................................... 785
Important Points to Remember....................................................................................................................................785
Conguring Interfaces for Layer 2 Mode....................................................................................................................786
Enabling Spanning Tree Protocol Globally................................................................................................................... 787
Adding an Interface to the Spanning Tree Group...................................................................................................... 789
Modifying Global Parameters....................................................................................................................................... 789
Modifying Interface STP Parameters...........................................................................................................................791
Enabling PortFast........................................................................................................................................................... 791
Prevent Network Disruptions with BPDU Guard.................................................................................................792
Selecting STP Root....................................................................................................................................................... 794
STP Root Guard.............................................................................................................................................................794
Root Guard Scenario............................................................................................................................................... 794
Conguring Root Guard..........................................................................................................................................795
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................796
Conguring Spanning Trees as Hitless........................................................................................................................ 796
STP Loop Guard.............................................................................................................................................................796
Conguring Loop Guard.......................................................................................................................................... 797
Displaying STP Guard Conguration........................................................................................................................... 798
50 SupportAssist.......................................................................................................................................... 799
Conguring SupportAssist Using a Conguration Wizard........................................................................................800
Conguring SupportAssist Manually...........................................................................................................................800
Conguring SupportAssist Activity............................................................................................................................. 802
Conguring SupportAssist Company..........................................................................................................................803
Conguring SupportAssist Person.............................................................................................................................. 803
Conguring SupportAssist Server...............................................................................................................................804
Viewing SupportAssist Conguration......................................................................................................................... 805
51 System Time and Date..............................................................................................................................807
Network Time Protocol.................................................................................................................................................807
Protocol Overview...................................................................................................................................................808
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