Manual

Accessing the switch 4
Bridge Protocol Data Units ................................................................................................................................... 49
Determining the path for forwarding BPDUs...................................................................................................49
Spanning Tree Group configuration guidelines .................................................................................................... 50
Default Spanning Tree configuration............................................................................................................... 50
Adding a VLAN to a Spanning Tree Group..................................................................................................... 50
Creating a VLAN .............................................................................................................................................50
Rules for VLAN tagged ports ..........................................................................................................................50
Adding and removing ports from STGs...........................................................................................................51
Assigning cost to ports and trunk groups........................................................................................................51
Multiple Spanning Trees.......................................................................................................................................51
Why do we need Multiple Spanning Trees?.................................................................................................... 51
VLAN participation in Spanning Tree Groups .................................................................................................52
Configuring Multiple Spanning Tree Groups...................................................................................................52
Port Fast Forwarding............................................................................................................................................54
Configuring Port Fast Forwarding ...................................................................................................................55
Fast Uplink Convergence .....................................................................................................................................55
Configuration guidelines..................................................................................................................................55
Configuring Fast Uplink Convergence ............................................................................................................55
RSTP and MSTP
Introduction...........................................................................................................................................................56
Rapid Spanning Tree Protocol .............................................................................................................................56
Port state changes ..........................................................................................................................................56
Port type and link type.....................................................................................................................................56
RSTP configuration guidelines........................................................................................................................57
RSTP configuration example ..........................................................................................................................57
Multiple Spanning Tree Protocol ..........................................................................................................................59
MSTP region ...................................................................................................................................................59
Common Internal Spanning Tree.................................................................................................................... 59
MSTP configuration guidelines .......................................................................................................................59
MSTP configuration example..........................................................................................................................59
IGMP Snooping
Introduction...........................................................................................................................................................64
Overview...............................................................................................................................................................64
FastLeave ....................................................................................................................................................... 64
IGMP Filtering .................................................................................................................................................65
Static multicast router...................................................................................................................................... 65
IGMP Snooping configuration example........................................................................................................... 65
Remote monitoring
Introduction...........................................................................................................................................................74
Overview...............................................................................................................................................................74
RMON group 1 — statistics............................................................................................................................. 74
RMON group 2 — history................................................................................................................................77
RMON group 3 — alarms................................................................................................................................79
RMON group 9 — events................................................................................................................................83
High availability
Introduction...........................................................................................................................................................85
Uplink Failure Detection .......................................................................................................................................85
Failure Detection Pair...................................................................................................................................... 86
Spanning Tree Protocol with UFD................................................................................................................... 86
Configuration guidelines..................................................................................................................................86
Monitoring Uplink Failure Detection ................................................................................................................87
Configuring Uplink Failure Detection............................................................................................................... 87
Troubleshooting tools
Introduction...........................................................................................................................................................90
Port Mirroring........................................................................................................................................................90
Configuring Port Mirroring (AOS CLI example)...............................................................................................91
Configuring Port Mirroring (BBI example) .......................................................................................................92
Other network troubleshooting techniques...........................................................................................................94
Console and Syslog messages.......................................................................................................................94
Ping.................................................................................................................................................................94
Trace route......................................................................................................................................................94
Statistics and state information .......................................................................................................................94