3Com NJ220 manual Other Priority & Vlan Settings

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Changing Device Configuration

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14The default setting for the Default Priority Level is 802.1p Priority 0 or 1. You can change this setting to Priority 2 or 3, Priority 4 or 5, or Priority 6 or 7.

The IntelliJack has four traffic queues with two priorities per queue. The lowest numbers (0 and 1) have the lowest priority. The default priority traffic is called “Best Effort” and serves as a baseline priority for all standard Ethernet traffic.

If you want to assign a higher priority to traffic on a particular port (voice traffic, for instance), you can do so. The higher the number the higher the priority (Priority 6 or 7 is the highest). The IntelliJack will send higher priority traffic ahead of lower priority traffic to improve the quality and throughput from that particular port.

15You can associate any of the four ports with any other ports on this IntelliJack to form a VLAN group. You can specify the tag schemes for the VLAN you create.

You can set the VLAN ID (VID) field to any number between 0 and 4094. The default setting is 1, which is the common practice. If all equipment is set at VID 1, you can communicate across all ports.

Since VLANs are used to separate network traffic to make it more manageable and secure, you would change the VID of the individual ports to meet the needs of your network.

In a classroom setting, for example, you may want the teacher to be on a separate VLAN than the students. You could assign VID 10 to Port 1 of the IntelliJack for the teacher and VID 20 to the other ports.

NOTE: The VID of a port must match the upstream switch VLAN assignments. If the IntelliJack’s VID assignments do not match the upstream switch and “add a VLAN tag” is set in the Egress rule, then the traffic that passes from the IntelliJack to the LAN will be dropped at the upstream switch port.

16To change the VLAN mode setting, click the box and select an option from the drop list. You can choose to Disable the VLAN. In this mode, ingress frames are forwarded through default switching rules.

You can also choose Enable unrestricted VLAN. In this mode, the port is associated with the current VLAN ID you have set. Frames ingressed into this port without a VLAN tag or with the same VLAN ID are forwarded within the VLAN. Frames with a different VLAN ID are forwarded according to default switching rules (i.e., based on the destination MAC address). Management packets are able to pass through this port on this setting.

Finally, you can choose Enable restricted VLAN. In this mode, the port is associated with the current VLAN ID you have set. All frames ingressed into this port are forwarded within the same VLAN, and management packets are blocked on this port.

Other Priority & VLAN Settings

17Click the box and select from the drop list to change the Priority Schedule Policy. The default setting is 8,4,2,1 weighted fair queuing scheme.

8,4,2,1 refers to the number of bytes removed from the IntelliJack’s buffer. 8 bytes of the highest priority traffic are removed from the buffer first, then 4 bytes from the second most important, 2 bytes from the third, etc. This is the most common priority scheme because it ensures that important traffic is prioritized but still allows traffic flow for all ports.

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Contents 3Com IntelliJack Switch NJ220 01752-3064 3Com CorporationCampus Drive Marlborough, MAContents Troubleshooting the NJ220 Installing the NJ220 Intellijack Using a particular port Following diagram shows the back view of the IntelliJack Component Purpose 3C Numbers Before You BeginInstalling Using an Integrated Switch with Power Over Ethernet Using a Multi-port Ethernet Power SupplySupply Using the 3Com Local Power Supply Using a Single-port Ethernet Power SupplyInstalling the NJ220 Intellijack Commercial Building Telecommunications Cabling Standard Installing the NJ220 Intellijack Installing the IntelliJack Installing the NJ220 Intellijack Description Connecting Devices toIntelliJack Checking the LEDsInstalling the NJ220 Intellijack Installing Configuration Managers Installing the Configuration Managers Installing the Local and Central Configuration Managers Installing the Configuration Managers Installing the Local and Central Configuration Managers Installing the Configuration Managers Installing the Web Http//java.sun.com Http//YourServerIPAddress8080/3ComIJNJ/main/index.jsp Installing the Configuration Managers Using Local Configuration Manager Using the Local Configuration Manager Setting Advanced Using the Local Configuration Manager Using Central Configuration Manager Using the Central Configuration Manager Discovering NJ220 Devices on Your Network Using the Central Configuration Manager Viewing Device Port Information General TabProduct Information Hardware Settings Viewing Device Properties Using the Central Configuration Manager Statistics Log Snmp Settings Advanced Settings Alert Level Notifying Event Changing Device Identification Settings General ConfigurationChanging Device Configuration Port Based Settings Priority & Vlan ConfigurationOther Priority & Vlan Settings Using the Central Configuration Manager Security Configuration Password802.1X Using the Central Configuration Manager Changing Device Configuration Snmp Configuration Event Alert Levels Advanced ConfigurationPort Based Controls Restoring Default Values Global Setting Default ValuePriority Option Multiplier Rate limiting option Port Setting Default Value Changing Device Configuration Using the Central Configuration Manager Finding Computers Upgrading the NJ220 Upgrading the NJ220 Firmware Using the Central Configuration Manager Upgrading the NJ220 Firmware Using the Central Configuration Manager Troubleshooting the NJ220 Troubleshooting the NJ220 Your 3COM Products Access Software Asia, Pacific Rim Telephone Technical Support and Repair Country Telephone NumberUS and Canada Telephone Technical Support and Repair Contract requests emeacontract@3com.comHardware Network InterfacePerformance Standards Conformance FeaturesMIB Support EnvironmentFfffffffffff Rmon CountersCollisions are not included but are counted in the Excessive Page Product Specifications Regulatory Information Japan Vcci Compliance