White Papers

Table Of Contents
Recover from Stack Link Flaps..............................................................................................................................886
Recover from a Card Problem State on a Stack...............................................................................................886
Chapter 50: Storm Control........................................................................................................ 888
Configure Storm Control...............................................................................................................................................888
Configuring Storm Control from INTERFACE Mode........................................................................................888
Configuring Storm Control from CONFIGURATION Mode.............................................................................889
PFC Storm........................................................................................................................................................................889
Detect PFC Storm.................................................................................................................................................... 889
Restore Queue Drop State..................................................................................................................................... 890
View Details of Storm Control PFC......................................................................................................................890
Chapter 51: Spanning Tree Protocol (STP)................................................................................ 892
Protocol Overview..........................................................................................................................................................892
Configure Spanning Tree.............................................................................................................................................. 892
Important Points to Remember...................................................................................................................................893
Configuring Interfaces for Layer 2 Mode..................................................................................................................894
Enabling Spanning Tree Protocol Globally................................................................................................................ 895
Adding an Interface to the Spanning Tree Group...................................................................................................896
Modifying Global Parameters.......................................................................................................................................897
Modifying Interface STP Parameters........................................................................................................................ 898
Enabling PortFast........................................................................................................................................................... 898
Prevent Network Disruptions with BPDU Guard.............................................................................................. 899
Selecting STP Root.........................................................................................................................................................901
STP Root Guard...............................................................................................................................................................901
Root Guard Scenario.................................................................................................................................................901
Configuring Root Guard.......................................................................................................................................... 902
Enabling SNMP Traps for Root Elections and Topology Changes..................................................................... 903
Configuring Spanning Trees as Hitless...................................................................................................................... 903
STP Loop Guard..............................................................................................................................................................903
Configuring Loop Guard.......................................................................................................................................... 904
Displaying STP Guard Configuration..........................................................................................................................905
Chapter 52: SupportAssist........................................................................................................ 906
Configuring SupportAssist Using a Configuration Wizard.................................................................................... 906
Configuring SupportAssist Manually.......................................................................................................................... 907
Configuring SupportAssist Activity............................................................................................................................ 908
Configuring SupportAssist Company..........................................................................................................................910
Configuring SupportAssist Person.............................................................................................................................. 910
Configuring SupportAssist Server................................................................................................................................911
Viewing SupportAssist Configuration......................................................................................................................... 912
Chapter 53: System Time and Date............................................................................................ 914
Network Time Protocol.................................................................................................................................................. 914
Protocol Overview.....................................................................................................................................................915
Configure the Network Time Protocol................................................................................................................. 915
Enabling NTP.............................................................................................................................................................. 915
Configuring NTP Broadcasts.................................................................................................................................. 916
Disabling NTP on an Interface................................................................................................................................ 916
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