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Planet Technology WGSW-2840 4.7.5 MAC Address Aging Time, “OK”, MAC Address Aging Time

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4.7.5 MAC Address Aging Time

The Aging Time affects the learning process of the Switch. Dynamic forwarding table entries, which are made up of the source and destination MAC addresses and their associated port numbers, are deleted from the table if they are not accessed within the aging time.

The aging time can be from 30 to 1,000,000 seconds with a default value of 300 seconds. A very long aging time can result in dynamic forwarding table entries that are out-of-date or no longer exist. This may cause incorrect packet forward indecisions by the Switch.

If the Aging Time is too short however, many entries may be aged out too soon. This will result in a high percentage of received packets whose source addresses cannot be found in the forwarding table, in which case the switch will broadcast the packet to all ports, negating many of the benefits of having a switch.

Static forwarding entries are not affected by the aging time.

To set the Aging Time, enter the number in the MAC Address Aging Time field, and click on the “OK” button to save. The valid range is 30~1000 seconds. Default is 300 seconds.

Contents

Page Trademarks Disclaimer FCC Warning CE Mark Warning WEEE Warning Table of Contents 5. TROUBLE SHOOTING 6. APPENDIX 1. INTRODUCTION 1.1 Packet Contents 1.2 How to Use This Manual 1.3 Product Feature 1.4Product Specification Standard Compliance 2. INSTALLATION 2.1 Product Description 2.1.1 Product Overview 2.1.2 Switch Front Panel 2.1.3 LED Indications 2.2 Install the Switch 2.2.1 Desktop Installation 2.2.2 Rack Mounting Step6: 3.CONSOLE MANAGEMENT 3.1Connecting to the Switch 3.2 Login in the Console Interface 3.3 Console Management 3.4 Telnet login 3.5 Commands 3.5.2 Privileged Command 3.5.2.1 Clear command 3.5.2.2 Copy command 3.5.2.3 Disable command 3.5.2.4 Reboot command 3.5.2.5 Set command 3.5.2.6 Show command Page 4. WEB-BASEDMANAGEMENT 4.1 About Web-basedManagement 4.2 Preparing for Web Management 4.3 System Login 4.4 System 4.4.1 IP Configuration 4.4.2SNMP 4.4.2.1 Theory 4.2.2.2 SNMP Configuration “system options” System Name: System Location: Contact: “OK” 4. Management Station Configuration 。Trap Community: must be the same string as “Add community” “Current Management Stations” 4.4.3 Password 4.4.4 CONSOLE 4.4.5 System Upgrade 4.4.6 Saving Parameters 4.4.7 Parameters Backup & Recovery 4.4.8 Load Default 4.4.9 Reboot 4.5 Port Management 4.5.1 Port Configuration 4.5.2 Port Statistics 4.5.3 Port Band Restrict 4.6 Redundancy 4.6.1 Spanning Tree 1. Spanning Tree Protocol Creating a Stable STP Topology STP Port States Each port on a switch using STP exists is in one of the following five states: Blocking Listening 2. STP Parameters Variable Default Spanning-TreeConfiguration Feature User-ChangeableSTA Parameters 3. Illustration of STP Page 4.6.2 Spanning Tree Configuration 1. Spanning Tree Configuration 2. Bridge Information 3. STP Port Configuration 4.6.3 Link Aggregation 4.7 Security 4.7.1 VLAN 4.7.1.1 Theory VLAN Description Port-basedVLAN IEEE 802.1Q VLANs Tagging Untagging 802.1Q VLAN Tags 802.1Q Tag Adding an IEEE802.1Q Tag Port VLAN ID 4.7.1.2 VLAN Configuration Port-base VLAN “Add/Modify” VLAN Confirutation Port List Understand nomenclature of the Switch VLAN Type “port2” Link Type Acces Trunk Access Trunk configuration: 4.7.2 MAC Address Bind 4.7.3 MAC Address Filtering 4.7.4 MAC Address Learning 4.7.5 MAC Address Aging Time 4.8 QoS 4.8.1 Understand QOS QoS Terminology 4.8.2 QOS Configuration 1. MAC-COSMapping 2. VLAN-COSMapping 3. 802.1p-CoSMapping 4. Port-COSMapping 5. COS-QueueMapping 6. Queue Management 4.9 Multicast 4.9.1 IGMP Snooping Theory IGMP Versions 1 and “report” “leave” IGMP Snooping Configuration “Enable” IGMP Snooping Status 4.10 Port Analysis 4.10.1 Port Analysis 4.10.2 Port Mirror 4.11 Storm Control 5. TROUBLE SHOOTING 5.1 Incorrect connections 5.1.1 Faulty or loose cables 5.1.2 Non-standardcables 5.1.3 Improper Network Topologies 5.2.1 Cabling 6. APPENDIX 6.1 Console Port Pin Assignments 6.2 100BASE-TX/10BASE-TPin Assignments