Service Manual

Verify a Stack Configuration.............................................................................................................936
Displaying the Status of Stacking Ports......................................................................................937
Remove Units or Front End Ports from a Stack...............................................................................938
Removing a Unit from an S-Series Stack...................................................................................938
Removing Front End Port Stacking............................................................................................ 939
Troubleshoot an S-Series Stack.......................................................................................................940
Recover from Stack Link Flaps................................................................................................... 940
Recover from a Card Problem State on an S-Series Stack.......................................................940
53 Storm Control.................................................................................................942
Configure Storm Control................................................................................................................. 942
Configuring Storm Control from INTERFACE Mode.................................................................942
Configuring Storm Control from CONFIGURATION Mode......................................................942
54 Spanning Tree Protocol (STP)..................................................................... 943
Protocol Overview............................................................................................................................943
Configure Spanning Tree................................................................................................................. 943
Related Configuration Tasks...................................................................................................... 943
Important Points to Remember.......................................................................................................944
Configuring Interfaces for Layer 2 Mode........................................................................................ 944
Enabling Spanning Tree Protocol Globally......................................................................................945
Adding an Interface to the Spanning Tree Group........................................................................... 947
Modifying Global Parameters...........................................................................................................948
Modifying Interface STP Parameters................................................................................................949
Enabling PortFast..............................................................................................................................949
Prevent Network Disruptions with BPDU Guard....................................................................... 950
Selecting STP Root........................................................................................................................... 952
STP Root Guard................................................................................................................................ 953
Root Guard Scenario...................................................................................................................953
Configuring Root Guard.............................................................................................................954
Enabling SNMP Traps for Root Elections and Topology Changes................................................. 955
Configuring Spanning Trees as Hitless............................................................................................ 955
STP Loop Guard................................................................................................................................956
Configuring Loop Guard.............................................................................................................957
Displaying STP Guard Configuration............................................................................................... 958
55 System Time and Date...................................................................................959
Network Time Protocol....................................................................................................................959
Protocol Overview......................................................................................................................960
Configure the Network Time Protocol...................................................................................... 961
Enabling NTP............................................................................................................................... 961
Configuring NTP Broadcasts...................................................................................................... 961
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