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3Com IntelliJack NJ205 Features Manual

Virtual lans and traffic prioritization
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TECHNICAL BRIEF
3Com
NJ205
®
IntelliJack
™
Switch
Management
Feature:
Virtual LANs
and Traffic
Prioritization

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Summary of Contents for 3Com IntelliJack NJ205

  • Page 1: Switch Management

    TECHNICAL BRIEF 3Com NJ205 ® IntelliJack ™ Switch Management Feature: Virtual LANs and Traffic Prioritization...

  • Page 2: Table Of Contents

    Benefits Support for port-based VLANs enables the 3Com IT and business benefits. For example, it can help: • Reduce the costs of IT equipment moves, upgrades, and other changes •...

  • Page 3: Vlan Configuration And Setup

    3 C O M ® N J 2 0 5 I N T E L L I J A C K ™ VLAN Configuration and Setup S W I T C H — V L A N S & T R A F F I C P R I O R I T I Z AT I O N Forwarding Outbound-Traffic to the LAN For most outbound data traffic, the PAN ports add VID tags to the Ethernet frames prior to them reaching the LAN (uplink) port.
  • Page 4 Forward frame to PAN port Figure 2. 3Com Central Configuration Manager GUI enables point-and-click remote administration of NJ205 IntelliJack Switches. S W I T C H — V L A N S & T R A F F I C P R I O R I T I Z AT I O N...

  • Page 5: Setting The Pan Port Associations

    Setting the PAN Port Associations The PAN (device) ports can support up to four different VLAN domains. 3Com Central Configuration Manager lets you assign individual ports to four separate VLANs, all ports to the same VLAN, or any combination in between. The following example illus- trates how the Port Associations are used to create two port groups assigned to separate VLANs—where the ports in one group cannot share traffic with ports in the other.
  • Page 6 ® N J 2 0 5 I N T E L L I J A C K ™ The 3Com Central Configuration Manager GUI enables point-and-click remote administration of NJ205 IntelliJack Switches. Figure 4. Port associations enable you to assign a VLAN broadcast domain to a single PAN port or group of associated ports.

  • Page 7: Setting Outgoing And Incoming Tag Schemes

    To reset the LAN port and recover network communications, the NJ205 IntelliJack Switch must be connected to a hub or flat VLAN. It can then be reconfigured with the proper VID using 3Com Central Configuration Manager. 1. Put a check the Outgoing Tag Scheme Note: This setting affects both VLAN and traffic priority sorting on a bridge-wide basis.

  • Page 8: What Is Traffic Prioritization

    3 C O M ® N J 2 0 5 I N T E L L I J A C K ™ What is Traffic Prioritization? S W I T C H — V L A N S & T R A F F I C P R I O R I T I Z AT I O N IEEE 802.1D/D17 (which incorporates IEEE 802.1p) traffic prioritization lets IT staff establish packet-based control over network traffic.

  • Page 9: Traffic Prioritization Configuration And Setup

    3 C O M ® N J 2 0 5 I N T E L L I J A C K ™ Traffic Prioritization Configuration and Setup Figure 6. The ingress mode is applied to prioritized traffic coming from the LAN before they are sent downstream to the PAN ports.
  • Page 10 S W I T C H — V L A N S & T R A F F I C P R I O R I T I Z AT I O N Configuring traffic priority levels is accomplished using 3Com Central Configuration Manager: 1.

  • Page 11: Setting Up Traffic Priority Schedule Policy

    Use this setting to modify how the switch will receive frames from each queue: 1. Open 3Com Central Configuration Manager 2. From the list of devices, select an NJ205 IntelliJack Switch and then select You can also highlight and right-click its IP address and select Hardware Settings 3.

  • Page 12: Business Application

    24-hour delay that cost the company many thousands of dollars. This disaster might have been avoided if IT staff had installed 3Com NJ205 IntelliJack Switches in all offices and conference rooms as part of the infrastructure upgrade. Using port-based VLANs, all VoIP transmissions could have been directed through their own subnet, regardless of what conference room was being used.

  • Page 13: Appendix A: Default Settings

    3 C O M ® N J 2 0 5 I N T E L L I J A C K ™ Appendix A: Default Settings S W I T C H — V L A N S & T R A F F I C P R I O R I T I Z AT I O N Global Switch Setting Max Frame Size Counter Mode...

  • Page 14: Appendix B: Additional Notes

    While every effort is made to ensure the information given is accurate, 3Com does not accept liability for any errors or mistakes which may arise. Specifications and other informa- tion in this document may be subject to change without notice.

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