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Chapter 7: LACP Port Trunks
90
LACP System Priority
It is possible for two devices interconnected by an aggregate trunk to
encounter a conflict when they form the trunk. For example, the two
devices might not support the same number of active ports in an
aggregate trunk or might not agree on which ports are active and which
are in standby mode.
If a conflict does occur, the two devices need a mechanism for resolving
the problem and deciding whose LACP settings take precedence. This is
the function of the system LACP priority value. A hexadecimal value of
from 1 to FFFF, this value is used whenever the devices encounter a
conflict creating a trunk—the lower the number, the higher the priority. As
a result, the settings on the device with the higher priority take precedence
over the settings on the other device. If both devices have the same
system LACP priority value, the settings on the switch with the lowest
MAC address take precedence. In the AT-S106 Management software,
the MAC address is called the System ID.
The LACP System Priority is pre-assigned and you cannot alter this
parameter.
Key Parameter
The key parameter is a hexadecimal value from 1 to FFFF that identifies
an aggregator. Each aggregator on a switch must have a unique key
parameter value. The key is restricted to a switch. Two aggregators on
different switches can have the same key without generating a conflict.
The switch automatically assigns these keys and you cannot be change
this parameter.
LACP Port Priority Value
The switch uses a port’s LACP priority to determine which ports are active
and which are in the standby mode in situations where the number of ports
in the aggregate trunk exceeds the highest allowed number of active
ports. This parameter is a hexadecimal value in a range of 1 to FFFF,
based on the port number. For instance, the priority values for ports 2 and
11 are 0002 and 000B, respectively. The lower the number, the higher the
priority. Ports with the highest priorities are designated as the active ports
in an aggregate trunk.
For example, if both 802.3ad-compliant devices support up to eight active
ports and there are a total of ten ports in the trunk, the eight ports with the
highest priorities (lowest priority values) are designated as the active
- Management 1
- Software 1
- Web Browser 1
- User’s Guide 1
- Contents 3
- List of Figures 7
- List of Tables 10
- Contacting Allied Telesis 13
- Chapter 1 15
- Switch’s IP Address 16
- Web Browser Tools 20
- Basic Switch Parameters 23
- Setting Up the IP Access List 26
- Deleting an IP 27
- Adding System 33
- Administration 33
- Information 33
- Modifying 34
- Deleting 35
- Viewing System Information 37
- Rebooting a Switch 40
- Pinging a Remote System 42
- 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 58
- Quality of Service (QoS) 59
- Configuring CoS 65
- Port Configuration 69
- Chapter 5: Port Configuration 72
- Static Port Trunking 75
- Port Trunking Overview 76
- Static Port Trunk Guidelines 77
- Creating a Port Trunk 79
- Modifying a Port Trunk 81
- 6. Click Apply 82
- Disabling a Port Trunk 83
- LACP Port Trunks 85
- LACP Overview 86
- LACP System Priority 90
- Key Parameter 90
- LACP Port Priority Value 90
- Displaying LACP Group Status 94
- Chapter 7: LACP Port Trunks 96
- Selecting Port Priority 97
- Chapter 8 99
- SNMP Overview 100
- Community String Attributes 102
- Creating an SNMP Community 105
- Modifying an SNMP Community 106
- Deleting an SNMP Community 107
- Creating a Host Table 108
- Modifying a Host Table Entry 109
- Deleting a Host Table Entry 110
- Enabling or Disabling Traps 111
- Modifying Traps 112
- Deleting Traps 113
- IGMP Snooping 115
- Overview 116
- Configuring IGMP Snooping 118
- Chapter 9: IGMP Snooping 120
- Bandwidth Control 121
- Ingress Rate 123
- Limiting 123
- Egress Rate 123
- Setting Storm Control 124
- Setting Ingress Rate Limiting 126
- Setting Egress Rate Limiting 128
- Chapter 10: Bandwidth Control 130
- Port Mirroring 131
- Configuring Port Mirroring 133
- Disabling Port Mirroring 134
- Static Multicast MAC Address 135
- Tree Protocols 143
- Path Costs and 146
- Port Costs 146
- Hello Time and 148
- Bridge Protocol 148
- Data Units 148
- Point-to-Point 149
- Edge Port 150
- Workstation 150
- Mixed STP and RSTP Networks 151
- Spanning Tree and VLANs 152
- Configuring the 157
- Basic RSTP Port 157
- Settings 157
- Advanced RSTP 159
- Port Settings 159
- Chapter 14 165
- Authentication 167
- Authenticator 167
- Port-based 170
- Network Access 170
- Guidelines 170
- Switch A 171
- Switch B 171
- Guest VLANs 172
- Chapter 15 177
- Configuring the RADIUS Client 179
- Dial-in User Configuration 181
- Configuring a Dial-in User 183
- Delete a Dial-in 184
- Destination MAC Filter 185
- Management Software Updates 189
- Configuration 195
- File Upload 195
- File Download 196
- Figure 64. Result Page 197
- Statistics 201
- Chapter 19: Statistics 204
- Browser Default Parameters 213
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