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Chapter 18: Classifiers
188
Figure 56. User Priority and VLAN Fields within an Ethernet Frame
You can identify a traffic flow of tagged packets using the user priority
value. A classifier for this type of traffic flow instructs a port to watch for
tagged packets containing the specified user priority level.
The priority level criteria can contain only one value, and the value must
be from 0 (zero) to 7. Multiple classifiers are required if a port is to watch
for several different traffic flows of different priority levels.
VLAN ID
A tagged Ethernet frame also contains within it a field of 12 bits that
specifies the ID number of the VLAN to which the frame belongs. The
field, illustrated in Figure 56, can be used to identify a traffic flow.
A classifier can contain only one VLAN ID. To create a port policy that
applies to several different VLAN IDs, multiple classifiers are required.
Protocol (Layer 2)
Traffic flows can be identified by the protocol specified in the Ethertype
field of the MAC header in an Ethernet II frame. Possible values are:
IP
ARP
RARP
Protocol Number
Preamble
Destination
Address
Source
Address
Type/
Length Frame Data CRC
64 bits 48 bits 48 bits
16
bits
368 to 12000 bits
32 bits
Tag Protocol Identifier
User
Priority
CFI VLAN Identifier
16 bits
3 bits
1
bit
12 bits
- User’s Guide 1
- Contents 3
- Document Conventions 10
- Contacting Allied Telesis 12
- Chapter 1 13
- Switch’s IP Address 14
- Save Configuration 17
- Web Browser Tools 18
- Basic Switch Parameters 21
- Setting Up the IP Access List 24
- Deleting an IP 26
- Adding System 31
- Administration 31
- Information 31
- Modifying 32
- Deleting 33
- Viewing System Information 36
- Rebooting a Switch 39
- Pinging a Remote System 41
- Average Time 43
- Virtual LANs 45
- VLAN Overview 46
- Tagged VLAN 48
- Tagged and Untagged Ports 49
- Port VLAN Identifier 49
- Chapter 3: Virtual LANs 50
- Creating a Tagged VLAN 51
- Modifying a Tagged VLAN 53
- Deleting a Tagged VLAN 55
- Creating a Port-Based VLAN 56
- Modifying a Port-Based VLAN 57
- Deleting a Port-Based VLAN 59
- Quality of Service (QoS) 61
- Configuring CoS 67
- Port Configuration 71
- Chapter 5: Port Configuration 74
- Port Trunking 77
- Port Trunking Overview 78
- Static Port Trunk Guidelines 79
- Creating a Port Trunk 80
- Modifying a Port Trunk 82
- 7. Click Apply 83
- Disabling a Port Trunk 84
- LACP Port Trunks 85
- LACP Overview 86
- Chapter 7: LACP Port Trunks 88
- LACP System Priority 90
- Key Parameter 90
- LACP Port Priority Value 90
- Displaying LACP Group Status 94
- Selecting Port Priority 96
- Chapter 8 99
- SNMP Overview 100
- Community String Attributes 101
- Creating an SNMP Community 104
- Modifying an SNMP Community 105
- Deleting an SNMP Community 106
- Creating a Host Table 107
- Modifying a Host Table Entry 108
- Deleting a Host Table Entry 109
- Enabling or Disabling Traps 110
- Modifying Traps 111
- Deleting Traps 112
- IGMP Snooping 113
- Overview 114
- Configuring IGMP Snooping 116
- Chapter 9: IGMP Snooping 118
- Bandwidth Control 119
- Setting Bandwidth Control 121
- Chapter 10: Bandwidth Control 122
- Port Mirroring 123
- Configuring Port Mirroring 125
- Disabling Port Mirroring 126
- Static Multicast MAC Address 127
- Protocols 133
- Path Costs and 136
- Port Costs 136
- Hello Time and 138
- Bridge Protocol 138
- Data Units 138
- Point-to-Point Ports 139
- (Full-duplex Mode) 139
- Edge Port 140
- Point-to-Point and Edge Port 141
- Workstation 141
- Mixed STP and RSTP Networks 142
- Spanning Tree and VLANs 143
- Configuring the 148
- Basic RSTP Port 148
- Settings 148
- Advanced RSTP 150
- Port Settings 150
- Chapter 14 157
- Authentication 159
- Authenticator 159
- AT-GS950/8POE 160
- Port-based 161
- Network Access 161
- Guidelines 161
- Switch A 163
- Switch B 163
- Guest VLANs 164
- Chapter 15 169
- Configuring the RADIUS Client 171
- Destination MAC Filter 173
- Power over Ethernet (PoE) 179
- Port Power Priority 181
- Setting Power over Ethernet 182
- Classifiers 185
- Classifier Criteria 187
- VLAN ID 188
- Protocol (Layer 2) 188
- DSCP (DiffServ Code Point) 189
- Protocol 189
- Creating Classifiers 192
- Chapter 18: Classifiers 194
- Access Control Policies 195
- ACP Components 197
- Creating Profile Action 199
- Creating an In-profile Action 201
- Creating a Policy 206
- Displaying a Policy Sequence 208
- Management Software Updates 209
- Statistics 219
- Chapter 21: Statistics 222
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