3Com 4.2.2 - Manual

A BOUT T HIS G UIDE This guide describes how to use the Transcend ATM and VLAN Network Management application. Introduction The ATM and VLAN Management Guide describes the features and functionalities that are implemented using the ATM and VLAN Management Tools. Audience Description This guide is in...

10 A BOUT T HIS G UIDE Conventions Table 2 and Table 3 list conventions that are used throughout this guide. Table 1 Organization of the ATM and VLAN Management User Guide If you are looking for: Turn to: A comprehensive description of the basic components and concepts of the ATM and VLAN Management...

Equipment Conventions 11 Equipment Conventions In this guide the term “Edge device” refers to any of the following: SuperStack II Switch 2700, 7200/7400 ATM/Ethernet Interface Card, 7600 Fast Ethernet Interface Card, Super Stack II Switch 1000/3000,NetBuilder II, CoreBuilder 4000,Super Stack II Swit...

1 ATM AND VLAN M ANAGEMENT O VERVIEW This chapter introduces you to the ATM and VLAN Management application. The following topics are discussed: ■ What is ATM and VLAN Management? ■ ATM and VLAN Management Maps ■ ATM and VLAN Management Tools ■ ATM and VLAN Management Assistants What is ATM and VLAN...

1-2 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW ■ Tools ■ Assistants or Wizards These components are network models that represent network information, based on the physical and logical structure of the network. The maps represent the network model and status information. Different maps are avail...

1-4 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW ATM and VLAN Management Maps The ATM and VLAN Management application includes the following maps: ■ ATM Device Manager map ■ ATM Network map ■ LAN Emulation map ■ Virtual LAN map ■ VLAN Policy map ■ Gigabit Network map ATM Device Manager Map The ATM...

1-6 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-2 shows an example of the graph and statistics of a CoreBuilder device. For example, to access teh device statistics window, select the device in the ATMvLAN Devices window and then from the ATMvLAN menu select Graph Assistant . Figure 1-2 ...

ATM and VLAN Management Maps 1-7 the branch and then select the Zoom icon. See page 1-27 for a description of the Zoom icon. Figure 1-3 Access to the ATM Devices Map through the Topology Browser To display the selected device in the Topology View, select the device in the Component View and then sel...

1-8 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW to various ATM devices, such as a SuperStack II switch 2700 and other CoreBuilder modules. The lines connecting the ATM switching domains indicate the P-NNI (Private Network to Network Interface) links between them. The ATM Network Map provides: ■ D...

1-10 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-6 shows the hierarchy in the Topology Browser from which you can access the ATM Network map. Figure 1-6 Access to the ATM Network Map through the Topology Browser To display a selected switch in the Topology Browser, select a switch in the...

ATM and VLAN Management Maps 1-11 ■ ATM device display in the LAN emulation process ■ Display of the LECS, LES,and LEC port connectivity ■ Isolation of LEC, LES, and LECS faults ■ Mapping of ELANs to VLAN ports display ■ Monitoring of LANE services performance Figure 1-7 LAN Emulation Map Main Displ...

1-12 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-8 LAN Emulation Submap/Backbone and Services Window

1-14 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Virtual LANs Map The Virtual LANs Map (see Figure 1-10), is used to manage the logical connectivity of the end-user through the Virtual LANs. The Virtual LANs maps provide views of the connectivity between Ethernet/ATM ports to the different VLANs....

1-16 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-12 shows the hierarchy in the Topology Tool from which you can access the Virtual LANs Map. Figure 1-12 Access to the Virtual LANs Map using the Topology Tool Component View To display components of the Virtual LANs map in the Topology Vie...

1-18 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-14 shows the hierarchy in the Topology Tool from which you can access the VLAN Policies Map. Figure 1-14 Access to the ATMvLAN Policies Map using the Topology Tool To display a component of the Policies Map in the Topology View, select the...

1-20 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-16 shows the hierarchy in the Topology Tool from which you can access the ATM and VLAN Gigabit Network Map. Figure 1-16 Access to the ATM and VLAN Gigabit Network Map using the Topology Tool To display a component of the Gigabit Ethernet M...

ATM and VLAN Management Tools 1-21 using the Topology icon. The Transcend Topology Browser can be used to perform all the network management tasks that are performed using the ATM and VLAN Management Maps and their assistants. The rest of the application tools are used for displaying graphs and stat...

1-22 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW The ATMvLAN Application Toolbar. Icon Display Icon Name Description Topology Opens the Transcend Topology Browser. The Topology Tool consists of the Component View and Topology View. You can perform most network management tasks using this tool. Se...

ATM and VLAN Management Tools 1-23 Figure 1-17 The ATMvLAN Toolbar Topology Tool The Transcend Topology Browser, formerly called the Wizard Tool is available as a part of the TEM 4.2.2 Unix release. The Topology Tool (see Figure 1-18), is designed to manage Virtual LANs and switched networks and can...

1-24 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW various network management tasks required to manage Virtual LANs and switched networks. Figure 1-18 The Transcend Topology Browser In the absence of a management platform (such as HPOV etc.), this tool can be used a the primary GUI for managing the...

ATM and VLAN Management Tools 1-25 The Topology View shows the layer 2 physical topology of large switched infrastructures (networks with more than 500 Switches) in a single hierarchy. For example, all the devices, such as ATM switches, Fast-Ethernet Switches, and there corresponding edge devices, a...

1-26 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW ■ Refresh - This tool updates the network status. The Topology Tool includes the following features: ■ Rearrange - You can rearrange the components for display by dragging them on the Component View to the desired location. ■ Search - This feature ...

ATM and VLAN Management Tools 1-27 Topology Tool ATMvLAN Objects Toolbar Icon Display Icon Name Description Zoom Zooms in on the selected branch. Performs the same zoom action as when you select an icon and then select ATMvLAN - > Zoom Physical in the ATM and VLAN management maps. ConfigurationAs...

1-28 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Bandwidth Tool The Bandwidth icon opens the Network Node Interface Traffic Tool, NNIx, (see Figure 1-19), and displays all the ATM switches and traffic patterns on the NNI and UNI levels of switches. The NNIx Browser and Maps provide a graphical di...

ATM and VLAN Management Tools 1-29 Figure 1-19 The Network Node Interface Traffic Tools Report Tool The Report icon opens the Network Node Interface Tabular Tool, NNIt, see Figure 1-20, and is identical to the Bandwidth Tool, except that the information is displayed in a report (tabular) format. The...

1-30 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-20 The Network Node Interface Tabular Tool Locator Tool The Locator Tool, (see Figure 1-21) functions as a search and modification tool to the ATM and VLAN application’s databases. These databases are built using other tools. For example, ...

ATM and VLAN Management Tools 1-31 The Locator Tool uses a search string that is color-coded and displays all other parameters for the selected string in the bottom portion of the dialog box. Figure 1-21 The Locator Tool Users Tool The Users Tool opens the Build UDB tool, see Figure 1-22, is used to...

1-32 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Since the Build UDB Tool requires lots of CPU as well as generates a lot of SNMP traffic, we recommend that you use this tool during periods of low network activity. Figure 1-22 The Build UDB Tool

ATM and VLAN Management Tools 1-33 Profile Tool The Profile icon opens the VnPro Tool that lists all the network devices and their associated VLANs. This tool provides a comprehensive inventory of all the VLANs in the network. Figure 1-23 The VnPro Tool The top section displays the VLAN Configuratio...

1-34 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Highlight a line in the display.The bottom section displays the information for the selected line. The bottom section of the VnPro Tool is used for display purposes only. The Options menu allows you to perform the following: ■ Move ■ Refresh ■ Save...

ATM and VLAN Management Tools 1-35 The Quit option exits the VnPro Tool. A VLAN may be defined without ports when the VLAN is defined in the edge device (Vbridge is allocated) however, the VLAN ports are not associated with the VLAN at this point.

1-36 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Tasks Tool The Tasks icon opens the Spider Tool (see Figure 1-25), that provides a graphical display of the underlying distributed processes in the ATM and VLAN Management application. This is only a graphical display tool used to illustrate the un...

ATM and VLAN Management Tools 1-37 Figure 1-26 Fast Setup Wizard Step 1 To select the CoreBuilder 7000 1 Enter the CoreBuilder 7000 IP Address or select an address from the drop down menu. 2 SNMP Community String. 3 Click Next. Panel 2 is displayed.

1-38 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-27 Fast Setup Wizard Step 2 1 Enter the Network prefix in the General Parameters wizard panel. 2 Click Next. Panel 3 is displayed.

ATM and VLAN Management Tools 1-39 Figure 1-28 Fast Setup Wizard Step 3 1 Select whether you want the Resident LECS Service to be enabled on the selected CoreBuilder. Toggling it on, immediately enables the LES Service. The resident LECS Service does not need to be enabled for the LES Service to be ...

1-40 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-29 Fast Setup Wizard Step 4 1 Enter the prefix and user-part addresses of the Active LECS table. 2 Click Next. Panel 5 is displayed.

ATM and VLAN Management Tools 1-41 Figure 1-30 Fast Setup Wizard Step 5 1 Enter the maximum number of NNI hops. 2 Select the port settings. The port settings may be either UNI, NNI or GW. Click Next. Panel 6 is displayed.

1-42 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-31 Fast Setup Wizard Step 6 1 Enter the Switch IP address, subnet mask and default gateway. 2 Enter the NMS address. Figure 1-32 Fast Setup Final panel

ATM and VLAN Management Tools 1-43 This panel is to review your settings. Use the scroll bar to view your settings. Click Prev to change settings. Click Finish to apply the settings. NMS Setup The ATMvLAN NMSetup Wizard allows you to setup the NMS by following the instructions on the screen. To use ...

1-44 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-34 NMS Setup Step 2 Delegation PDP Enter the Device Set and the Target Poller and click Next. Setup 3 is displayed. See Figure 1-35

1-46 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Figure 1-36 NMS Setup Step 4 Advanced Options Define the number of seconds that the application will wait for the network to settle down before it start the LES failure verification process. This number could be tuned down to about 120 seconds if t...

1-48 C HAPTER 1: ATM AND VLAN M ANAGEMENT O VERVIEW Toggle on the appropriate fields and click Next. The final panel is displayed showing your final NMS Setup settings. See Figure 1-38 NMS Final Panel Review Settings ATM and VLAN Management Assistants ATM and VLAN Management Assistants are launched ...

2-2 C HAPTER 2: C ONFIGURING AND L AUNCHING THE ATM AND VLAN M ANAGER Click on the NMSetup icon in the ATMvLAN Toolbar. The NMSetup Wizard Panel is displayed. See Figure 2-1. Figure 2-1 NMSetup Step 1 For a detailed description of the NMSetup Tool see page 1-43. Configuring SNMP SmartAgents on Devic...

Configuring SNMP SmartAgents on Devices 2-3 (NMS). This allows the NMS to access these devices directly over the ATM network instead of going across routers. 3 Configure the IP address, and default gateway of Bridge 0 in each of the edge device units. See the device Installation and Setup Guide for ...

2-4 C HAPTER 2: C ONFIGURING AND L AUNCHING THE ATM AND VLAN M ANAGER CAUTION: Do not start the ATM and VLAN Network Manager until all the ATM and VLAN devices have been discovered and appear in the IP Map of the management platform. Setting Up for Distributed Polling Polling in SNMP management is t...

Configuring SNMP SmartAgents on Devices 2-5 The following steps must be followed when installing distributed pollers: 1 Install the Transcend ATM and VLAN Management application on the central machine on top of an open management platform such a HPOV. In a distributed polling environment, this machi...

2-6 C HAPTER 2: C ONFIGURING AND L AUNCHING THE ATM AND VLAN M ANAGER An Example of Distributed Polling . Figure 2-2 A Listing of Contents from the C:\TranscendNT\ATMvLAN\runtime\cnf\mediationd.cnf Line one displays the range of IP addresses (IP address 100.200.100) with their last address field, ad...

Device Configuration for VLANs in ATM Networks 2-7 Device Configuration for VLANs in ATM Networks A Virtual LAN is logical port group spanning a single device or multiple devices on a network forming a single broadcast or flooding domain. When LAN Emulation protocols are used to create broadcast dom...

2-8 C HAPTER 2: C ONFIGURING AND L AUNCHING THE ATM AND VLAN M ANAGER 3 The Network Management Station should be connected directly to the switch running the primary LECS. This will ensure that the NMS always has access to the LECS so that it can enable the backup LES when the primary LES fails. See...

Device Configuration for VLANS in Non-ATM Networks 2-9 Device Configuration for VLANS in Non-ATM Networks Virtual LANs in non-ATM (Fast Ethernet) environments are created by using Layer 2 encapsulation or Tagging as a means to create broadcast or flooding domains. Ports that are common to multiple V...

2-10 C HAPTER 2: C ONFIGURING AND L AUNCHING THE ATM AND VLAN M ANAGER Starting Up the ATM and VLAN Manager This section describes the start-up procedure for the ATM and VLAN Management application for the HPOV/OVW platform: Setting Up and Customizing the ATM and VLAN Management Application Before y...

Starting Up the ATM and VLAN Manager 2-11 discovery database, you can manually discover devices using the Manual Device Discovery Assistant. See “Using the Manual Device Discovery Assistant” on page 4-2. Verify that your network is up and running. As the application begins, it is modeling (understan...

2-12 C HAPTER 2: C ONFIGURING AND L AUNCHING THE ATM AND VLAN M ANAGER not customize the colors and alias settings, device view VLAN moves can not be applied. 1 Select the Virtual LANs icon and then select the Configuration Assistant icon. This displays the Virtual LANs configuration window. Figure ...

Starting Up the ATM and VLAN Manager 2-13 These files and directories must be backed-up before installing/upgrading to a newer release of the ATM and VLAN Management application. The ATMvLAN NMSetup Wizard allows you to modify these configuration files. This customization will take effect upon resta...

2-14 C HAPTER 2: C ONFIGURING AND L AUNCHING THE ATM AND VLAN M ANAGER Restart the ATM VLAN Application Unload the ATMvLAN Maps and then reload them. To unload, select all six ATMvLAN root icons. From the ATMvLAN menu select Unload Transcend ATMvLAN Maps. This allows all the configuration files, col...

Device Discovery 2-15 Device Discovery Devices are discovered only if they are up and respond to SNMP queries. The devices must appear in the management platform's IP Map first. Re-discovering Devices You can update the application to include new ATM and VLAN devices while the application is running...

3 U SING THE ATM AND VLAN M ANAGEMENT A PPLICATION This chapter describes how to use the ATM and VLAN management application user interface. The following topics are discussed: ■ Navigating ATM and VLAN Maps ■ Using the ATM and VLAN Tools ■ Using the ATM and VLAN Assistants Navigating ATM and VLAN M...

3-2 C HAPTER 3: U SING THE ATM AND VLAN M ANAGEMENT A PPLICATION To navigate through a submap: Click on an icon then select Zoom Physical from the ATMvLAN menu. You can also navigate through submaps using the Topology Tool. Double click on the Component View entry to see the sub-maps. Table 3-1 Wind...

Navigating ATM and VLAN Maps 3-3 ATMvLAN Devices Map The ATMvLAN Devices Map displays all the ATM and VLAN devices on the network. Each device is represented by an icon. Each device is color coded according to its current status in the network Figure 3-2 The ATMvLAN Devices Window For the SuperStack...

3-4 C HAPTER 3: U SING THE ATM AND VLAN M ANAGEMENT A PPLICATION To display a device front panel using the Transcend Topology Browser: 1 Select the device in the Component View portion of Topology Browser. 2 Select the Zoom icon in the Topology Browser toolbar. or Double click on the device in the C...

3-8 C HAPTER 3: U SING THE ATM AND VLAN M ANAGEMENT A PPLICATION Virtual LANS Map The Virtual LANs Map is used to display the VLANs and the associated segments in the network. Figure 3-7 The Virtual LANs Window To locate the Virtual LANs in the Topology Browser Topology View: 1 Select the Virtual LA...

3-12 C HAPTER 3: U SING THE ATM AND VLAN M ANAGEMENT A PPLICATION To display the LAN Emulation components in the Topology Browser: 1 Select the component in the Topology Browser Component View. 2 Select the Cross Reference Tool. ATM Network Map You can examine the overall structure of the ATM Networ...

Navigating ATM and VLAN Maps 3-13 Figure 3-11 The ATM Network Map To display the ATM Network components in the Topology View: 1 Select the component in the Topology Browser Component View. 2 Select the Cross Reference Tool. Table 3-6 Window Access from the ATM Network Map Window Name Select Action D...

3-14 C HAPTER 3: U SING THE ATM AND VLAN M ANAGEMENT A PPLICATION ATM and VLAN Policies Map The ATM and VLAN Policies Map shows the different automatic VLAN configuration policies you can use to assign to the VLAN devices. Figure 3-12 The ATM and VLAN Policies Map To display the ATMvLAN policies com...

Using the ATM and VLAN Tools 3-15 Using the ATM and VLAN Tools The ATM and VLAN Toolbar automatically appears when you start up the ATM and VLAN Management application. The tools may be used to perform various network tasks and also provide you with an assortment of status displays. The ATMvLAN Tool...

Using the ATM and VLAN Assistants 3-17 VLAN Aliases and Colors Configuration Assistant The VLAN Aliases and Colors Assistant is used to setup the VLAN aliases and colors. To launch the VLAN Aliases and Colors Assistant: 1 From the Root window, select the Virtual LAN icon. 2 Select Configuration Assi...

3-18 C HAPTER 3: U SING THE ATM AND VLAN M ANAGEMENT A PPLICATION ■ Data Direct Figure 3-14 This Window Displays the VC Path Between Two LE Clients. ‘

II O PERATING THE ATM AND VLAN M ANAGER This section provides step-by-step instructions for performing network management tasks using the ATM and VLAN Management application. Chapter 4 Network Configuration Tasks Chapter 5 Network Modification Tasks Chapter 6 Network Troubleshooting Tasks Chapter 7 ...

4-2 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS ■ clear the entire database You can sort all the device types according to all the fields contained in the ATM and VLAN Devices database. After you modify, change, add or delete devices from the ATM and VLAN database you must restart the application for...

Configuring Manual Device Discovery 4-3 The Manual Discovery window is displayed in Figure 4-1. Figure 4-1 Manual Discovery Setup Window All devices appear initially with the default Community Name and Polling Interval settings. These entries may be modified by changing the Community Name in the app...

4-4 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS Adding Devices 1 Enter the device’s parameters in the display fields of section 1 2 Click Add. Modifying Devices 1 Double click on a row In the scrolling region. The device and its parameters appear in the display fields of section 1 or select a Device ...

4-6 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS ■ Set up the LECS database (Set the primary LES and set the backup LES of each ELAN) ■ Activate the Automatic LANE Redundancy Monitor ■ Setup for Quick LANE Redundancy Figure 4-3 The Backbone and Services Configuration Window

Configuring LAN Emulation Services 4-7 To access the Backbone and Services Configuration Assistant: 1 From the LAN Emulation map or Topology Browser LAN Emulation component, select the Backbone and Services icon or branch. 2 Select the Configuration icon from the Topology Browser or from the ATMvLAN...

Configuring LAN Emulation Services 4-9 primary LES is actually down and activate the backup LES upon completion of the vital checks. These vital checks only take a few seconds (10-15 seconds) to complete. Quick LANE redundancy mode is recommended for most networks. When the Quick LANE redundancy mod...

4-10 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS 4 The Network Management Station should have direct access to at least one LECS in the network, when an ELAN fails. 5 Do not use too many primary LESs on a single switch. Distribute the LESs across the backbone. 6 Sixteen is the default number of activ...

Configuring LAN Emulation Services 4-11 When LAN Emulation redundancy is activated on the NMS, see Activating LANE Redundancy, and when a switch running the primary LES fails, the NMS detects the failure. For the description of failure resolution, see “LES Failure Resolution” on page 4-11. The backu...

4-12 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS down. If a LEC cannot bind to the backup LES, it is necessary to check if the LEC can connect to the LES and the LES can in turn, connect back to the LEC. Correct E-IISP planning for route failover/redundancy is required for LANE redundancy to work. Ho...

Configuring LAN Emulation Services 4-13 Since an LECS may be located on the same switch as the primary LES, if the primary LECS (primary LECS is the one on the top of the priority list) fails along with the primary LES, its database cannot be altered by the “LANE Monitor” to point to the backup LES ...

4-14 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS Each ELAN contains two entries of LES addresses. 5 For each ELAN, select the LES that was not automatically changed. 6 Click Apply to update the database. Manual LANE Redundancy operates on only one LECS at a time. You can select the LECS in the Topolo...

Configuring LAN Emulation Services 4-15 a Move the ports in the backup ELAN to a temporary ELAN using the VLAN move option. Then move the ports from the temporary ELAN to the primary ELAN. It is important to first move to temporary ELAN first and this temporary ELANID must be in the LECS database. b...

4-16 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS An Example of Setting Up and Activating LANE Redundancy The following is an example of a simple 2 CoreBuilder 7000 setup demonstrating the LES/BUS and LECS redundancy. Equipment (Hardware) Software 3.1 or later version running on CoreBuilder 7000 and L...

Configuring LAN Emulation Services 4-17 To configure the NMS: 1 Connect the NMS to port 1 on one of the 2700s. 2 Ping all the devices. Be certain that both the CoreBuilder 7000 management ports are connected to the bridge 0 ports on the 2700s. Make sure they appear in the HPOV IP map. 3 Run the ATMv...

4-18 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS To setup LANE Redundancy (LES/BUS/LECS): 1 From the LANE Emulation map or Topology Browser, select the Backbone and services icon or branch. 2 Select the Configure icon or Configuration Assistant from the ATMvLAN menu. The Backbone and Services window ...

4-20 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS At this stage, the “LANE Monitor” tracks LES/BUS failure and activates redundancy if there is a failure of primary LES. Bridge 0’s LES/BUS is on CoreBuilder 7000 A and its backup is on CoreBuilder 7000 B. Bridge 1's LES/BUS is on CoreBuilder 7000 B and...

Configuring VLAN Aliases and Colors 4-21 All the LECs join the new “admin” ELAN since the LECS points them to the new “admin” LES. It takes approximately 15 seconds to update the LECSs via Transcend Management Software. It takes about two minutes to reboot the switch with the old LES, and about five...

4-22 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS The following steps listed below illustrate the VLAN alias and color setup. This procedure is common for both ATM-based VLANs as well as non-ATM VLAN alias setup. 1 From the Root window select the Virtual LANs icon and then from the ATMvLAN menu select...

Configuring VLAN Aliases and Colors 4-23 5 Click Apply to update the database. If you do not click Apply, none of your changes are entered into the database. Before you begin changing/moving VLANs in the network, you must define the admin and default VLANs using this option. Select the ELAN that the...

4-24 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS To conduct a search based on a specified parameter. 1 Select the parameter from the Search Field. 2 Enter the search string (may be a partial value) in the Value field. 3 Select Search. Figure 4-7 Locator Tool VLAN Aliases and Colors Configuring Policy...

Configuring Policy-based VLAN Auto-configuration 4-25 auto-configuration can be extended to include protocol-based VLAN auto-configuration and application-based VLAN auto-configuration. Automatic Configuration of VLANs and Network Security One of the most important considerations in automatic VLAN c...

4-26 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS Integrated TEM/Unix or TEM/NT Based VLAN Server. This server is integrated with the TEM application and is use in policy- based VLANs. Policy-based VLANs are supported on ATM-based switches such as the CoreBuilder 7000/7x00, SuperStack II Switch 1000 w...

Configuring Policy-based VLAN Auto-configuration 4-27 ATMvLAN application to recognize and communicate with an NT based stand-alone VLAN Server (IP address and SNMP community string). Configuring MAC- based VLAN Auto-configuration Policy This section describes how to configure devices to enforce the...

4-28 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS 4 Using the Build UDB tool, do an inventory of the network so that the MAC address location (device/port/VLAN) where this PC is attached to is learned and stored. Build UDB Tool The Build UDB tool can be configured to do an MAC address inventory of the...

Configuring and Using the MACvDB 4-29 Configuring and Using the MACvDB The MACvDB is used to perform the following two functions: 1 Finding a MAC address in the network. 2 Mapping MAC addresses to VLANs. Finding a MAC Address Locating a MAC address allows the network administrator to see which switc...

4-30 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS The Search History indicates the searches you have perform thus far. To display the contents of your database: ■ Select Search. Once the parameters appear in the display section you can edit or modify the database. It is recommended that you use the Ed...

Configuring and Using the MACvDB 4-31 A warning message appears. Figure 4-9 The Locator Tool/MACvDB Tab Apply the MAC-based VLAN Auto-configuration to the Devices To apply the MAC-based auto-configuration policy to the devices you have to move the devices into the MAC-based policy. To move the devic...

4-32 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS This removes the device from the policy. Once a device or port is put into a policy, all open/unused ports are automatically placed into the default VLAN. You will notice a message on the NMS screen saying that VLAN move has taken place. Verify that Au...

Configuring IP Subnet-based VLAN Auto-configuration 4-33 To configure of IP Subnet -based policy on devices you have to populate the VLAN server database with IP-Subnet to VLAN mapping information. 1 Start the Locator Tool and select the SubnetVdb tab,. 2 Click on the Search button to bring up the S...

4-34 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS ■ Select Search. Once the parameters appear in the display section you can edit or modify the database. Modifying the Subnet To modify the SubnetvDB: 1 Select a row. 2 Use the bottom portion of the dialog box to edit parameters. 3 Select Replace. A war...

Configuring IP Subnet-based VLAN Auto-configuration 4-35 A warning message appears. Figure 4-10 The Locator Tool Subnet vDB Moving Devices into the IP Subnet-based Policy To move the devices into the IP Subnet-based policy: 1 Select the edge device in the ATMvLAN Devices map 2 Select the IP Subnet-b...

4-36 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS Verify that Automatic IP Subnet-based VLAN Auto-configuration Activated. 1 Move the PC from the port on the SuperStack II Switch 2700 to another open port on another SuperStack II 2700 (or another port on the same 2700) The destination device/port must...

4-38 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS Searching the VLAN Server Scalar Parameters To search the VLAN Server Scalar Parameters using the Locator Tool: 1 Click on the Locator Tool icon. 2 Select the VLAN Server Scalar Parameters. Figure 4-11 The Locator Tool VLAN Server Scalar Parameters Con...

Configuring IP Subnet-based VLAN Auto-configuration 4-39 Searching the VLAN Server Member Table To search the VLAN Server Member Table using the Locator Tool: 1 Click on the Locator Tool icon. 2 Select the VLAN Member Table tab. 3 Select the Get Button to download the VLAN Server database to a local...

4-40 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS Configuring or Viewing Administrative Status of ATM and VLAN Components To view or configure administrative status select the icon in the management maps and then select Configuration Assistant from the ATMvLAN menu or select the device component in th...

Configuring or Viewing Administrative Status of ATM and VLAN Components 4-41 Figure 4-13 The LEC Configuration Dialog Box

Configuring or Viewing Administrative Status of ATM and VLAN Components 4-43 LE Server Parameters & Status Configuration Assistant The LE Server Parameters & Status Window is displayed in Figure 4-14. It shows the Parameters and Status Parameters o the selected LES. Figure 4-14 LES Parameter...

Configuring or Viewing Administrative Status of ATM and VLAN Components 4-45 Ethernet Port Parameters & Status Configuration Assistant The window shows the Port Parameters and the Port Status of the selected Ethernet port. Ethernet Port Parameters & Status Window is displayed in Figure 4-15....

4-46 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS The port parameters are: The Port Status is: ATM Port Parameters & Status ATM Port Parameters & Status Window is displayed in Figure 4-16. It shows the Port Parameters and the Port Status of the selected ATM port. Table 4-8 Port Parameters Para...

Configuring or Viewing Administrative Status of ATM and VLAN Components 4-47 Figure 4-16 LsOc3Portx x Window/ATM Port Parameters and Status To access the window: 1 From Switch x.x.x.x, select an ATM port or from an ATM SuperStack, select an ATM port on a SuperStack II Switch 2700 module. 2 With the ...

4-48 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS The port status is: SuperStack II Switch 2700 Parameter and Status Information The SuperStack II Switch 2700 Parameter and Status Information window is displayed in Figure 4-17. The window shows system and chassis Information. This information is read-...

4-50 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS ■ From an ATM SuperStack, select “System patch” for a SuperStack II Switch 2700 module and then with the device view displayed, select Configuration Assistant from the ATMvLAN menu . The system information is: The chassis information is: CoreBuilder 70...

Configuring or Viewing Administrative Status of ATM and VLAN Components 4-51 Figure 4-18 CoreBuilder Module ATM Port Parameters & Status To access the window: From a CoreBuilder.x.x.x.x, select an ATM port and then with the device view displayed, select Configuration Assistant from the ATMvLAN m...

Configuring or Viewing Administrative Status of ATM and VLAN Components 4-53 CoreBuilder 7000 Module Parameter and Status Information CoreBuilder 7000 Module Parameter and Status Information Window is displayed in Figure 4-19. It shows system and chassis information. This information is read-only. F...

4-54 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS The System Information is: The Chassis Information is: Table 4-19 System Information Parameters Meaning Description A textual description of the SuperStack II Switch 2700 module. Sys Oid System Object Id. Vendor identification of the CoreBuilder 7000 m...

Configuring or Viewing Administrative Status of ATM and VLAN Components 4-55 CoreBuilder 7000 Module Switch Board Parameters & Status CoreBuilder 7000 Module.x.x.x.x Parameters & Status Window is displayed in. It shows the Module Parameters and the Status of a CoreBuilder 7000 Module. Figure...

Configuring PVCs 4-57 Configuring PVCs You can configure Permanent Virtual Channels between ATM devices. To configure Permanent Virtual Channels between ATM devices: 1 Locate the ATM devices that are to be connected. See “Locate the ATM Devices” on page 4-57. 2 Display existing VCs between ATM devic...

4-58 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS VPI is in the range 0:4 and VCI in the range 64:511 The new PVC is displayed in the window. Pinpointing Channel Congestion If you want to locate channel congestion, you can examine the ATM Paths using the VC Path Assistant. Congestion can be pinpointed...

Configuring PVCs 4-59 Figure 4-21 VC Path Statistics The VC Statistics window shows the traffic through each link of the trail in a bar graph. If the traffic is normal, the height of each bar should be approximately the same. However if the height of successive bars in the direction of the flow decr...

4-60 C HAPTER 4: N ETWORK C ONFIGURATION T ASKS To examine Virtual Channels: 1 In the ATM Network window, double click on an ATM Switch Domain and select Zoom Physical from the ATMvLAN menu. The Virtual Path window is displayed as shown in Figure 4-22. 2 Select any two ATM devices in the ATM Switch ...

5 N ETWORK M ODIFICATION T ASKS This chapter describes how to perform the following ATM and VLAN Management network modification tasks. The following topics are described: ■ VLAN Moves ■ Enabling and Disabling Ports ■ Manual LECS Database Modification VLAN Moves There are two types of VLAN moves: ■ ...

5-2 C HAPTER 5: N ETWORK M ODIFICATION T ASKS Several methods are provided for moving Ethernet segments between VLANs. They are detailed in the following sections. ■ Using the VLAN Move Operation ■ Drag-and-Drop Ethernet Segments Between VLAN Windows. ■ For the SuperStack II Switch 2700 or CoreBuild...

VLAN Moves 5-3 To locate Ethernet segments: 1 In the Root window, double click on the Virtual LANs icon or highlight the icon and from the ATMvLAN menu select Zoom Physical. Alternatively, you can descend through the LAN Emulation windows to the LANE User window. See “Using the LAN Emulation Window”...

5-4 C HAPTER 5: N ETWORK M ODIFICATION T ASKS The VN-vLAN_name window appears as in Figure 5-2, with the Ethernet segments associated with the selected VLAN displayed. Figure 5-2 The VN_name window 3 Reposition the VN-vLAN_name window so that it is separate from the Virtual LANs window. 4 In the VN-...

VLAN Moves 5-5 The port icons, colored brown, are part of the admin VLAN. These icons cannot be moved from the admin VLAN to other VLANs in SuperStack II Switch 2700 or CoreBuilder with the 7X00 card units.These ports can be moved from the admin VLAN to other VLANs in SuperStack II Switch 1000/3000 ...

5-6 C HAPTER 5: N ETWORK M ODIFICATION T ASKS Using the LAN Emulation Window 1 In the Root window, double click on the LAN Emulation icon or highlight the icon and select the Zoom icon. 2 Double click on the source LANE User or highlight the icon and select the Zoom icon . The LANE User window is di...

VLAN Moves 5-7 In the HPOV platform, use CTRL/MB1for multiple selections or select a rectangle over an area to enclose multiple Ethernet segment icons using the drag/MB1 feature. 3 Open the destination window. You do not need to select anything. 4 Using the middle mouse button, drag the Ethernet seg...

5-8 C HAPTER 5: N ETWORK M ODIFICATION T ASKS When you toggle on a VLAN name, the lines underneath the ports become the alias color of the VLAN, thus making it easier to identify the ports associated with the VLAN. Figure 5-4 SuperStack II Switch 2700 Front Panel Display 2 Click on the destination E...

VLAN Moves 5-9 Automatic VLAN Moves Based on Policies In addition to the manual VLAN Move method above, devices can be setup to automatically configure themselves into VLANs based on policies. Using this method, ports automatically move between VLANs. The changes are dynamically reflected in the VLA...

5-10 C HAPTER 5: N ETWORK M ODIFICATION T ASKS Local VLANs and VLAN Move Local VLANs act as “holding” VLANs in the event that LAN Emulation connectivity is incomplete. Although local VLANs cannot be directly established by the ATMVLAN manager, they can be activated during a VLAN Move operation invol...

VLAN Moves 5-11 Using the information derived from the snooping procedure, the device then attempts to resolve something based on the policy it is trying to enforce. For example, if the policy is a MAC-based auto-VLAN configuration policy, the device will resolve the MAC address to VLAN mapping usin...

5-12 C HAPTER 5: N ETWORK M ODIFICATION T ASKS VLAN server is deployed in the network. This policy is not supported in this release. ■ IP Subnet based automatic VLAN configuration policy Segments or devices assigned to this policy will automatically be configured into various VLANs based on a predef...

Enabling and Disabling Ports 5-13 associated to the segment (or another proxy device) will enforce the policy on that device or segment. Figure 5-5 ATM and VLAN Policy Map You can move segments from one policy to another using the same operations as the VLAN Move. See “Moving Ethernet Segments Betwe...

Manual LECS Database Modification 5-15 Each ELAN contains two entries of LES addresses. 5 For each ELAN, select the LES that was not automatically changed. 6 Click Apply to update the database. Manual LANE Redundancy operates on only one LECS at a time. You can select the LECS in the Topology Tool o...

6-2 C HAPTER 6: N ETWORK T ROUBLESHOOTING T ASKS The icon statuses are listed in Table 6-1 according to the severity of the fault. Device Level Troubleshooting Table 6-2 indicates operating statuses of the ATMvLAN Device icons. Table 6-1 Color Coding Key Status Color Critical Red Major Orange Minor ...

LANE Level Troubleshooting 6-3 LANE Level Troubleshooting Table 6-3 indicates operating statuses of the ATMvLAN Device icons Table 6-3 Color Key for LANE Level LAN Emulation All icons reflect highest priority status of maps below it. Backbone and Services LES Critical Not defined for this version Ma...

Virtual LANs Level Troubleshooting 6-5 Identifying VLAN Splits After the redundancy in the LAN Emulation Server has taken effect, the LAN Emulation Clients (LECs) are moved to the backup services. There may be circumstances where some of the LAN Emulation Clients (LECs) remain connected to the prima...

6-6 C HAPTER 6: N ETWORK T ROUBLESHOOTING T ASKS To unify the split VLANS: ■ Check that all the LAN Emulation Configuration Servers have the same LAN that is displaying the split. ■ Using the Network Management Station, move the ports displayed in the primary VLAN to a temporary VLAN. Move the ports...

Path Assistants for Identifying Connectivity and Performance Problems 6-7 The ATM path assistant also allows you to setup PVCs between the selected endpoint. Tracing a VC Path Between Two ATM End Nodes To trace a VC Path between two ATM nodes perform the following tasks: ■ Select two ATM end nodes i...

7 N ETWORK P ERFORMANCE M EASUREMENT T ASKS This chapter describes how to perform the following ATM and VLAN Management network performance measurement tasks. The following topics are described: ■ Measuring Network -wide ATM Traffic Performance Using the Bandwidth Icon ■ Measuring Device Level Perfo...

7-2 C HAPTER 7: N ETWORK P ERFORMANCE M EASUREMENT T ASKS The historical data collected and stored by the NNIx tool can be graphed viewed as line graphs, pie charts and bar graphs. The following sections describe the various components of the NNIx tool as well as how to configure the tool for histor...

Measuring Network -wide ATM Traffic Performance Using the Bandwidth Icon 7-3 To select a switch for display on the active NNIx Map 1 Click on the ATM Switch entry in the NNIx Browser. 2 Click on the Show (plus) icon. To select a switch hierarchy for display on the active NNIx map 1 Click on the ATM ...

7-4 C HAPTER 7: N ETWORK P ERFORMANCE M EASUREMENT T ASKS Each ATM switch is displayed as a circular icon which is also a pie chart representing the in and out UNI traffic corresponding to that switch. The upper 1/2 portion of the pie represents the maximum percentage of speed of the out traffic and...

Measuring Network -wide ATM Traffic Performance Using the Bandwidth Icon 7-5 ■ NNIx Traffic Polling Configuration Tab ■ Communication Configuration Tab ■ History Configuration Tab ■ Simulation Configuration Tab Map Configuration Tab The Map Configuration tab allows you to configure the radius of the...

7-6 C HAPTER 7: N ETWORK P ERFORMANCE M EASUREMENT T ASKS NNIx Traffic Polling Configuration Tab The NNIx Polling Configuration tab allows you configure the polling interval for data collection of the NNIx Tool. See Figure 7-4. Figure 7-4 The NNIx Polling Configuration Tab The following 3 sub-option...

Measuring Network -wide ATM Traffic Performance Using the Bandwidth Icon 7-7 Communication Configuration Tab The Communication Configuration tab allows you configure the type of data that is monitored and collected. See Figure 7-5. Figure 7-5 NNIx Communication Configuration Tab ■ Good - configures ...

7-8 C HAPTER 7: N ETWORK P ERFORMANCE M EASUREMENT T ASKS History Configuration Tab This History Configuration tab allows you to enable data archiving and also set the storage interval. See Figure 7-6. Figure 7-6 The NNIx History Configuration Tab When History is enabled, polled data is archived int...

Measuring Network -wide ATM Traffic Performance Using the Bandwidth Icon 7-9 Figure 7-7 The NNIx Simulation Configuration Tab How to Graph Live Link and Node data When the NNIx tool is running Link and Node level traffic can be graphed using the Node performance and Link Performance menu options. Th...

7-10 C HAPTER 7: N ETWORK P ERFORMANCE M EASUREMENT T ASKS The bar graph shows the total in/out traffic percentages relative to the switches maximum capacity for a node or link. Figure 7-8 The NNIx Bar Chart The pie chart shows the percentage of in versus out traffic for a node or link. Figure 7-9 T...

Measuring Device Level Performance 7-11 The cumulative pie chart shows the combined throughput percentages of in traffic and the combined throughput percentages of out traffic for nodes and links. Figure 7-10 The NNIx Cumulative Pie Chart Measuring Device Level Performance The Performance Statistics...

7-12 C HAPTER 7: N ETWORK P ERFORMANCE M EASUREMENT T ASKS Toggle legend: Clicking the middle mouse button while the cursor is located inside the history graph will cause the legend to be hidden and the graph to be widened. The widened display contains the same information but is now easier to read....

7-14 C HAPTER 7: N ETWORK P ERFORMANCE M EASUREMENT T ASKS Displaying Port Level Statistics To display port level statistics: 1 Select a port from within the SuperStack II Switch 2700 branch of the Component View of the Topology Browser, or select a port on the front panel display of the SuperStack ...

Displaying Port Level Statistics 7-15 Traffic History graph through the port in frames per second. Four separated sub-graphs are in the performance window: Utilization Dial graph of utilization of maximum bandwidth (10Mbps) of the port. Total Frames Pie chart showing the distribution of all received...

7-16 C HAPTER 7: N ETWORK P ERFORMANCE M EASUREMENT T ASKS Errored Frames Pie chart showing the distribution of errored received and transmitted frames according to the following: LANE Component Statistics The LANE Component Statistics allow you to measure the performance of LAN Emulation Services a...

LANE Component Statistics 7-17 Data/Control Octets pie graph of the ratio between LES transmission rate and BUS transmission rate. To display performance statistics for the LAN Emulation Services: 1 Select an LES icon from the management maps or an LES device component in the Component View of the T...

7-18 C HAPTER 7: N ETWORK P ERFORMANCE M EASUREMENT T ASKS LEC The LEC Graph Assistant, see Figure 7-14, shows statistics of the message traffic through the LEC. The LEC Statistics are: Data frames/sec History graph of the transmission rate of data frames through the LEC. Data Frames Pie graph of th...

LANE Component Statistics 7-19 To display performance statistics for an LAN Emulation Client: 1 Select an LEC icon from the management maps or an LEC device component in the Component View of the Topology Browser. 2 Select the Graph Assistant option from the ATMvLAN menu. Figure 7-14 LEC Graph Assis...

7-20 C HAPTER 7: N ETWORK P ERFORMANCE M EASUREMENT T ASKS LANE User The LANE User statistics parameters graph see Figure 7-15, displays a group of statistics per LEC. The display shows the in traffic and out traffic on the LEC and its segments. These graphs use the Transcend common grapher tool. Yo...

7-22 C HAPTER 7: N ETWORK P ERFORMANCE M EASUREMENT T ASKS Switch Domain Statistics To display the statistics from an ATM switch: 1 Select the ATM switch icon. 2 Select Graph Assistant from the ATMvLAN menu . Figure 7-17 displays the Graph Assistant for the CoreBuilder. Figure 7-17 Graph Assistant f...

A S UPPORTED D EVICES This appendix describes the devices and system software supported for the ATM and VLAN Management application. Table A-0 Supported Devices Device Description CoreBuilder 7000/HD CoreBuilder 7000 is an ATM switch, used in an ATM network and serves as an LE services entity as wel...

A-2 A PPENDIX A: S UPPORTED D EVICES SuperStack II Switch 3000 SuperStack II Switch 3000 is a Fast Ethernet switch. It allows Fast Ethernet switching and connectivity form Fast Ethernet to ATM. It can be used as a Backbone switch to connect multiple LS1000 devices, thus creating a FE/Ethernet networ...

B T ROUBLE S HOOTING System Problems The following system problems can arise during a session: Icons Present at Startup Problem: The Enterprise VLAN icons are already present in the Root window when the application is started. The reason is that HPOV was previously terminated abnormally. Note: this ...

B-2 A PPENDIX B: T ROUBLE S HOOTING Problem Starting the Application Problem: If you are having problems starting the application or discovering devices, you can enable the error log feature of the Enterprise VLAN application. Action: Generate an application error log. To activate the log you need t...

System Messages B-3 the icons to appear and the application to startup. This situation occurs when the station has a defined DNS and cannot reach it. Action: Remove the DNS definition or check how the station can reach the DNS. This is a system problem due to the DNS definition. Slow System Startup ...

C-2 A PPENDIX C: ATM AND VLAN M ANAGEMENT B ASICS ATM Basics ATM uses short, fixed-length packets called cells. The first five bytes of each cell, the header, contain the information necessary to deliver the cell to its destination. The fixed-length cells offer smaller and more predictable switching...

An Introduction to ATM and VLAN Management Basics C-3 which is typically used to interconnect two ATM switches managed as part of the same network. ■ The UNI is the physical interface between the user and the network. A private UNI consists of a private end-point to private switch interface, whereas...

C-4 A PPENDIX C: ATM AND VLAN M ANAGEMENT B ASICS cell with a given connection, and therefore it can be routed to the right destination. Identical VPI/VCI combinations may exist on different interfaces. The VPI is a bundle of VCs. Individual VCs have unique VCI values, but the VCI values may be reus...

An Introduction to ATM and VLAN Management Basics C-5 example, SNMP). Permanent connections generally remain established for long periods of time. These connections are not dynamically checked and reinitiated. The major features of a PVC include: ■ Connections initiated by network administrator. ■ C...

C-6 A PPENDIX C: ATM AND VLAN M ANAGEMENT B ASICS Integrated ATM/Ethernet Switching ATM Backbone Network When Ethernet LANs are connected through a conventional switching hub or backbone, the bandwidth provided is restricted to the data rate of the Ethernet or FDDI technology running on it. If, inst...

An Introduction to ATM and VLAN Management Basics C-7 In practice, it is not the individual LAN stations that are formed into VLANs but rather the physical Ethernet LANs, called Ethernet segments, that are grouped into VLANs. Thus, all stations on an Ethernet segment will be on the same VLAN. Also, ...

C-8 A PPENDIX C: ATM AND VLAN M ANAGEMENT B ASICS ATM-based VLANs When the enabling technology is ATM, the VLAN is referred to as an ATM-based VLAN. An ATM-based VLAN is built around an ATM network structure called an Emulated LAN. LAN Emulation The main objective of the LAN Emulation (LE) is to ena...

An Introduction to ATM and VLAN Management Basics C-9 emulated Ethernet service interface to higher level software which implements the LAN Emulation User-to-Network Interface (LUNI). LAN Emulation Configuration Server (LECS) The LAN Emulation Configuration Server implements the assignment of indivi...

C-10 A PPENDIX C: ATM AND VLAN M ANAGEMENT B ASICS operate in a Switched Virtual Channel (SVC),Permanent Virtual Channel (PVC), or mixed SVC/PVC environment. Figure C-3 LAN Emulation Components Admin and Default VLANs Two special purpose ATM-based VLANs are established automatically by the system, t...

An Introduction to ATM and VLAN Management Basics C-11 the configuration is such, the network manager should ensure that IP connectivity to the device is not affected by VLAN moves. The Default VLAN When an ATM edge device is initialized, a single VLAN called the default VLAN is created automaticall...

C-12 A PPENDIX C: ATM AND VLAN M ANAGEMENT B ASICS Trunk (VLT). A VLT port in one switch unit must be connected only to a VLT port in the second switch unit so that the traffic can be switched to the correct VLAN. Tagging To distinguish between data frames belonging to different VLANS which are sent...

G LOSSARY ATM Asynchronous Transfer Mode. A transmission protocol that segments user traffic into small, fixed size cells. Cells are transmitted to their destination, where the original traffic is re-assembled. AAL ATM Adaptation Layer. A set of protocols that translate user traffic from higher-laye...

4 G LOSSARY fact they are on physically separate segments. A virtual LAN acts as a broadcast domain. VPI Virtual Path Identifier. A field in a cell header which identifies the specific virtual path on which the cell is traversing on the current physical circuit. VCI Virtual Channel Identifier. A fie...

I NDEX 1 I NDEX A AAL in the protocol stack C - 3 AAL5 C - 3 parameters B - 6 Active LECS table 1 - 40 active/enabled LECS 1 - 11 adding devices 4 -4 address resolution LEC C - 8 through LES 3 -17 address space list of in ATM network 3 -12 Admin Status 4 -44 admin VLAN C - 10 aliases and colors VLAN...