Service Manual

Adding a Stack Unit............................................................................................................. 1039

Adding a Standalone Switch to a Stack...........................................................................1039

Merging Two Stacks............................................................................................................1040

Split a Stack............................................................................................................................1041

Managing Redundant Stack Management......................................................................1041

Resetting a Unit on a Stack................................................................................................1042

Verify a Stack Configuration..............................................................................................1042

Using Show Commands...............................................................................................1042

Troubleshooting a Switch Stack....................................................................................... 1045

Failure Scenarios.............................................................................................................1047

Upgrading a Switch Stack.............................................................................................1050

Upgrading a Single Stack Unit......................................................................................1051

57 Storm Control................................................................................................................... 1053

Configure Storm Control................................................................................................... 1053

Configuring Storm Control from INTERFACE Mode..............................................1054

Configuring Storm Control from CONFIGURATION Mode..................................1054

58 Spanning Tree Protocol (STP)....................................................................................... 1056

Protocol Overview...............................................................................................................1056

Configure Spanning Tree....................................................................................................1057

Related Configuration Tasks........................................................................................ 1057

Important Points to Remember.................................................................................. 1057

Configuring Interfaces for Layer 2 Mode........................................................................1058

Enabling Spanning Tree Protocol Globally.....................................................................1059

Adding an Interface to the Spanning Tree Group.........................................................1062

Removing an Interface from the Spanning Tree Group..............................................1062

Modifying Global Parameters............................................................................................1062

Modifying Interface STP Parameters................................................................................1063

Enabling PortFast................................................................................................................. 1064

Prevent Network Disruptions with BPDU Guard...........................................................1065

Global BPDU Filtering..........................................................................................................1067

Interface BPDU Filtering.....................................................................................................1068

Selecting STP Root.............................................................................................................. 1068

STP Root Guard....................................................................................................................1069

Root Guard Scenario.....................................................................................................1069

Configuring Root Guard............................................................................................... 1070

Enabling SNMP Traps for Root Elections and Topology Changes............................ 1071

Configuring Spanning Trees as Hitless............................................................................ 1071

STP Loop Guard....................................................................................................................1072

Configuring Loop Guard...............................................................................................1073

Displaying STP Guard Configuration............................................................................... 1074