Allied Telesis AT-S87 - Manual (Page 4)

Contents
4
Creating a Port Trunk........................................................................................................................................52
Modifying a Trunk .............................................................................................................................................54
Removing a Trunk.............................................................................................................................................55
Chapter 6: Port Mirroring ..............................................................................................................................57
Port Mirroring Overview ....................................................................................................................................58
Configuring Port Mirroring .................................................................................................................................59
Modifying a Port Mirror......................................................................................................................................62
Chapter 7: VLANs ..........................................................................................................................................63
VLAN Overview.................................................................................................................................................64
Port-based VLAN Overview ..............................................................................................................................66
VLAN Name................................................................................................................................................66
Group ID .....................................................................................................................................................66
General Rules for Creating a
Port-based VLAN ..............................................................................................................................................66
Tagged VLAN Overview ...................................................................................................................................67
Tagged and Untagged Ports ......................................................................................................................67
Port VLAN Identifier....................................................................................................................................68
General Rules for Creating a Tagged VLAN ..............................................................................................68
Creating a Port-Based VLAN ............................................................................................................................69
Creating a Port-Based VLAN......................................................................................................................69
Modifying a Port-Based VLAN....................................................................................................................70
Viewing a Port-Based VLAN.......................................................................................................................71
Creating a Tagged VLAN..................................................................................................................................72
Creating a Tagged VLAN ...........................................................................................................................72
Modifying a Tagged VLAN..........................................................................................................................74
Viewing a Tagged VLAN ............................................................................................................................75
Changing a Port’s VLAN Mode .........................................................................................................................76
Chapter 8: Class of Service (CoS) ................................................................................................................79
CoS Overview ...................................................................................................................................................80
Scheduling..................................................................................................................................................82
Strict Priority Scheduling ......................................................................................................................83
Weighted Round Robin Priority Scheduling .........................................................................................83
Configuring CoS................................................................................................................................................84
Mapping CoS Priorities to Egress Queues .......................................................................................................86
Specifying the Scheduling Algorithm ................................................................................................................87
Chapter 9: IGMP .............................................................................................................................................89
IGMP Snooping Overview.................................................................................................................................90
Enabling or Disabling IGMP Snooping..............................................................................................................92
Chapter 10: STP and RSTP ...........................................................................................................................93
STP Overview ...................................................................................................................................................94
Bridge Priority and the Root Bridge ............................................................................................................94
Path Costs and Port Costs...................................................................................................................95
Port Priority ..........................................................................................................................................97
Forwarding Delay and Topology Changes...........................................................................................97
Hello Time and Bridge Protocol Data Units (BPDUs) ..........................................................................98
Point-to-Point and Edge Ports..............................................................................................................98
Mixed STP and RSTP Networks ..............................................................................................................100
Spanning Tree and VLANs.......................................................................................................................100
Enabling or Disabling Spanning Tree .............................................................................................................102
Configuring the STP Bridge Settings ..............................................................................................................105
Configuring the Spanning Tree Port Settings .................................................................................................107
Chapter 11: Security ....................................................................................................................................109