Allied-telesis AT-S88 Manual do Utilizador Página 4

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Contents
4
SNMP Overview................................................................................................................................................44
Default SNMP Community Strings ............................................................................................................. 45
Setting Up the SNMP Community Table...........................................................................................................46
Setting Up the Host Table.................................................................................................................................47
Setting Up SNMP Trap Receivers .................................................................................................................... 49
Chapter 6: Port Trunking ...............................................................................................................................51
Port Trunking Overview .................................................................................................................................... 52
Static Port Trunk Overview.........................................................................................................................52
Static Port Trunk Guidelines ................................................................................................................ 53
Creating a Port Trunk........................................................................................................................................54
Modifying a Trunk ............................................................................................................................................. 56
Removing a Trunk............................................................................................................................................. 57
Chapter 7: Port Mirroring ..............................................................................................................................59
Port Mirroring Overview .................................................................................................................................... 60
Configuring Port Mirroring ................................................................................................................................. 61
Modifying a Port Mirror......................................................................................................................................64
Chapter 8: VLANs .......................................................................................................................................... 65
VLAN Overview................................................................................................................................................. 66
Port-based VLAN Overview ..............................................................................................................................68
VLAN Name................................................................................................................................................68
Group ID .....................................................................................................................................................68
General Rules for Creating a Port-based VLAN......................................................................................... 68
Tagged VLAN Overview ................................................................................................................................... 69
Tagged and Untagged Ports ......................................................................................................................69
Port VLAN Identifier....................................................................................................................................70
General Rules for Creating a Tagged VLAN ..............................................................................................70
Creating a Port-Based VLAN ............................................................................................................................ 71
Creating a Port-Based VLAN...................................................................................................................... 71
Modifying a Port-Based VLAN.................................................................................................................... 72
Viewing a Port-Based VLAN.......................................................................................................................73
Creating a Tagged VLAN.................................................................................................................................. 74
Creating a Tagged VLAN ........................................................................................................................... 74
Modifying a Tagged VLAN..........................................................................................................................76
Viewing a Tagged VLAN ............................................................................................................................ 77
Changing a Port’s VLAN Mode .........................................................................................................................78
Chapter 9: Class of Service (CoS) ................................................................................................................81
CoS Overview ...................................................................................................................................................82
Scheduling..................................................................................................................................................84
Strict Priority Scheduling ......................................................................................................................84
Weighted Round Robin Priority Scheduling .........................................................................................85
Configuring CoS................................................................................................................................................ 86
Mapping CoS Priorities to Egress Queues .......................................................................................................88
Specifying the Scheduling Algorithm ................................................................................................................89
Chapter 10: IGMP ...........................................................................................................................................91
IGMP Snooping Overview.................................................................................................................................92
Enabling or Disabling IGMP Snooping.............................................................................................................. 94
Chapter 11: STP and RSTP ...........................................................................................................................95
STP Overview ...................................................................................................................................................96
Bridge Priority and the Root Bridge ............................................................................................................ 96
Path Costs and Port Costs................................................................................................................... 97
Port Priority ..........................................................................................................................................99
Forwarding Delay and Topology Changes...........................................................................................99
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