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AT-S39 User’s Guide
129
The type of MAC address described above is referred to as a dynamic
MAC address. Dynamic MAC addresses are addresses that the switch
learns by examining the source MAC addresses of the frames received
on the ports.
Dynamic MAC addresses are not stored indefinitely in the MAC address
table. The switch deletes a dynamic MAC address from the table if it does
not receive any frames from the node over a specified period of time.
The switch assumes that the node with that MAC address is no longer
active and that its MAC address can be purged from the table. This
prevents the MAC address table from becoming filled with addresses of
nodes that are no longer active.
The period of time that the switch waits before purging an inactive
dynamic MAC address is called the aging timer. This value is adjustable
on the AT-8024 and AT-8024GB Switches. The default value is 300
seconds (5 minutes). For instructions on changing the aging timer, refer
to Changing the Aging Time on page 139.
The MAC address table can also store static MAC addresses. A static MAC
address, once entered in the table, remains in the table indefinitely and
is never deleted, even when the end node is inactive.
You might need to enter static MAC addresses of end nodes the switch
will not learn in its normal dynamic learning process, or if you want a
MAC address to remain permanently in the table, even when the end
node is inactive.
- User’s Guide 1
- Table of Contents 3
- Section III 6
- List of Figures 8
- How This Guide is Organized 10
- Document Conventions 11
- Contacting Allied Telesyn 13
- Management Software Updates 14
- Overview 15
- Local Management Session 18
- Telnet Management Session 19
- Section I: Overview 20
- SNMP Management Session 21
- Local and Telnet Management 22
- Starting a Local or Telnet 23
- Starting a Local 25
- Enhanced 27
- Stacking 27
- Local Session 28
- How Do You 33
- Assign an IP 33
- Address? 33
- Enhanced Stacking 46
- Enhanced Stacking Overview 47
- IP Address 49
- Enter new setup (M/S/U) -> 51
- Returning to 53
- Displaying Port Status 55
- 2 - Speed .............. 0100 59
- Displaying Uplink Information 62
- Port Security Overview 65
- Configuring Port Security 67
- Port Trunking 72
- Port Trunking Overview 73
- Creating a Port Trunk 75
- Enter Trunk Port(s) -> 76
- Deleting a Port Trunk 77
- Port Mirroring Overview 79
- Creating a Port Mirror 80
- Deleting a Port Mirror 81
- STP Overview 83
- Redundant 84
- Finding and 84
- Resolving 84
- Configuring STP Port Settings 88
- VLAN Overview 91
- Port-based VLAN Overview 93
- Port-based 95
- Drawbacks to 96
- Example 1 97
- Example 2 98
- (PVID 3) 99
- Ports 21 - 24 (PVID 4) 99
- Tagged VLAN Overview 100
- AT-S39 User’s Guide 101
- General Rules 102
- Tagged VLAN 102
- Basic VLAN Mode Overview 105
- Modifying a VLAN 112
- The VLAN has been modified 115
- Displaying VLAN Information 116
- Deleting a VLAN 117
- Deleting All VLANs 119
- Changing a PVID Value 120
- Setting a Switch’s VLAN Mode 122
- MAC Address Table 127
- MAC Address Overview 128
- Displaying MAC Addresses 130
- Viewing MAC Addresses by Port 133
- XXXXXX XXXXXX 134
- Adding Static MAC Addresses 137
- Deleting MAC Addresses 138
- Changing the Aging Time 139
- Class of Service 140
- Class of Service Overview 141
- Configuring CoS 142
- IGMP Snooping 143
- IGMP Snooping Overview 144
- Activating IGMP Snooping 146
- Broadcast Frame Control 151
- Ethernet Statistics 157
- Displaying Port Statistics 158
- Displaying Switch Statistics 161
- Obtaining Software Updates 164
- Management Session 165
- Return to Previous Menu 166
- Web Browser Management 171
- Starting a Web Browser 172
- Switch’s IP Address 173
- Quitting from a 175
- Web Browser 175
- Management 175
- Basic Switch Parameters 176
- Viewing System Information 182
- Resetting a Switch 186
- Port Parameters 187
- Configuring Port Parameters 188
- Port Security 196
- Port Trunks 198
- Port Mirroring 201
- Spanning Tree Protocol 204
- Virtual LANs 210
- Creating a VLAN 211
- Displaying VLANs 217
- Enabling or Disabling VLANs 219
- Changing a PVID 220
- Viewing the MAC Address Table 223
- Configuring IGMP Snooping 232
- AT-S39 Default Settings 238
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