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VLAN tagging ............................................................................................................................................................. 46
VLANs and IP interfaces ........................................................................................................................................... 49
VLAN topologies and design considerations ....................................................................................................... 49
VLAN configuration rules .................................................................................................................................... 49
Multiple VLANS with tagging ................................................................................................................................... 50
Configuring the example network ................................................................................................................... 51
FDB static entries ........................................................................................................................................................ 57
Trunking support for FDB static entries .............................................................................................................. 57
Configuring a static FDB entry ........................................................................................................................... 57
Spanning Tree Protocol
Introduction ................................................................................................................................................................ 58
Overview ..................................................................................................................................................................... 58
Bridge Protocol Data Units ....................................................................................................................................... 58
Determining the path for forwarding BPDUs ................................................................................................... 58
Spanning Tree Group configuration guidelines ................................................................................................... 59
Default Spanning Tree configuration ............................................................................................................... 59
Adding a VLAN to a Spanning Tree Group .................................................................................................... 59
Creating a VLAN .................................................................................................................................................. 59
Rules for VLAN tagged ports .............................................................................................................................. 59
Adding and removing ports from STGs ............................................................................................................ 60
Assigning cost to ports and trunk groups ........................................................................................................ 60
Multiple Spanning Trees ............................................................................................................................................ 60
Why do we need Multiple Spanning Trees? ................................................................................................... 60
VLAN participation in Spanning Tree Groups ................................................................................................. 61
Configuring Multiple Spanning Tree Groups ................................................................................................... 61
Port Fast Forwarding .................................................................................................................................................. 63
Configuring Port Fast Forwarding ..................................................................................................................... 64
Fast Uplink Convergence ......................................................................................................................................... 64
Configuration guidelines .................................................................................................................................... 64
Configuring Fast Uplink Convergence ............................................................................................................. 64
RSTP and MSTP
Introduction ................................................................................................................................................................ 65
Rapid Spanning Tree Protocol ................................................................................................................................ 65
Port state changes .............................................................................................................................................. 65
Port type and link type ........................................................................................................................................ 65
RSTP configuration guidelines ............................................................................................................................ 66
RSTP configuration example .............................................................................................................................. 66
Multiple Spanning Tree Protocol ............................................................................................................................. 68
MSTP region ........................................................................................................................................................... 68
Common Internal Spanning Tree (CIST) .......................................................................................................... 68
MSTP configuration guidelines ........................................................................................................................... 68
MSTP configuration example ............................................................................................................................. 68
Quality of Service
Introduction ................................................................................................................................................................ 73
Overview ..................................................................................................................................................................... 73
Using ACL filters .......................................................................................................................................................... 74
Summary of packet classifiers ........................................................................................................................... 74
Summary of ACL actions .................................................................................................................................... 75
Understanding ACL precedence ..................................................................................................................... 75
Using ACL Groups ...................................................................................................................................................... 76
ACL Metering and Re-marking ............................................................................................................................... 76
Metering ................................................................................................................................................................ 76
Re-marking ............................................................................................................................................................ 77
Viewing ACL statistics ............................................................................................................................................... 77
ACL configuration examples ................................................................................................................................... 77
Configure Access Control Lists (AOS CLI example) ...................................................................................... 77
Configure Access Control Lists and Groups (BBI example 1) ...................................................................... 78
Using DSCP values to provide QoS ......................................................................................................................... 82
Differentiated Services concepts ..................................................................................................................... 82
Per Hop Behavior ................................................................................................................................................. 82