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Bay Networks BayStack 281 Series Manual

Fast ethernet switch
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Using the
BayStack 281xx
Fast Ethernet Switch
Part No. 893-00965-A
September 1996

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Summary of Contents for Bay Networks BayStack 281 Series

  • Page 1 Using the BayStack 281xx Fast Ethernet Switch Part No. 893-00965-A September 1996...
  • Page 2 Inc. reserves the right to make changes to the products described in this document without notice. Bay Networks, Inc. does not assume any liability that may occur due to the use or application of the product(s) or circuit layout(s) described herein.

  • Page 3: Table Of Contents

    Preface Purpose xiii Audience xiii Conventions Special Message Format Use of Enter, Type, and Press Other Conventions Related Publications Ordering Bay Networks Publications Customer Support CompuServe xvii InfoFACTS xvii World Wide Web xviii How To Get Help xviii Express Technical Support from the North America TRC...
  • Page 4 Virtual Networking with the BayStack 281xx Switch LattisSpan Protocol LattisSpan Terminology BayStack 281xx Switch Operation Cable Options Link Speeds Detecting a One-Way Link Transmission State Full-duplex Operation Flow Control Address Tables and Considerations 2-10 Address Tables in a Single BayStack 281xx Switch 2-11 Address Tables in Multiple BayStack 281xx Switches on the Same Network 2-13...
  • Page 5 Planning for BayStack 281xx Switch Software Upgrades 2-45 Downloading Software from a Network Management Station 2-45 Downloading Software from a Boot Server 2-45 893-00965-A...
  • Page 6 Chapter 3 Installing the BayStack 281xx Switch Installation Requirements Package Contents Installation Procedures Installing the BayStack 281xx Switch on a Tabletop or Shelf Installing the BayStack 281xx Switch in a Rack Connecting a BayStack 281xx Switch to a Model RPSU Redundant Power Supply Unit Powering Off the Baystack281xx Switch when Connected to a Model RPSU Power Supply Unit 3-12 After Installing the Hardware...
  • Page 7 Configuring Basic System Parameters 4-11 Modifying the Master Switch Priority 4-15 Modifying Switch Port Type 4-17 Modifying the Attachment Port Speed and Duplex Mode 4-18 Modifying Switch Port Flow Control 4-20 Modifying the Expansion Port Speed and Duplex Mode 4-22 Modifying Boot Parameters 4-23 Configuring SNMP Parameters...
  • Page 8 -viii 893-00965-A...
  • Page 9 Figures Figure 1-1. Front panel components of the BayStack 281xx switch Figure 1-2. Two types of BayStack 281xx switch LEDs Figure 1-3. Front panel display and keypad Figure 1-4. Rear panel components of the BayStack 281xx switch Figure 1-5. Faceplate on rear panel of the BayStack 281xx switch 1-10 Figure 2-1.
  • Page 10 switches 2-36 Figure 2-19. Using a cascade cable to increase bandwidth on BayStack 281xx switches 2-39 Figure 2-20. Redundant link configuration 2-42 Figure 2-21. Maximum of seven BayStack 281xx switches between any two end stations 2-43 Figure 2-22. Unsupported configuration exceeds seven BayStack 281xx switches between end stations 2-44 Figure 3-1.
  • Page 11 Figure 4-3. System Information screen Figure 4-4. Local VLAN Information screen 4-10 Figure 4-5. Configuration Parameters menu 4-11 Figure 4-6. Switch Parameters menu 4-12 Figure 4-7. Reset System menu 4-13 Figure 4-8. Switch Port Type menu 4-17 Figure 4-9. Switch Port Speed and Duplex Mode menu 4-19 Figure 4-10.
  • Page 12 893-00965-A...
  • Page 13 Tables Table 1. Bay Networks Technical Response Centers xviii Table 1-1. Expansion port configuration options Table 1-2. Attachment port configuration options Table 1-3. Attachment port LEDs Table 2-1. BayStack 281xx switch cable options Table 2-2. Port configurations and operating mode 2-38 Table 2-3.
  • Page 14 893-00965-A...

  • Page 15: Preface

    Preface Congratulations on your purchase of the Bay Networks BayStack 281xx Fast ™ ™ Ethernet Switch, which provides frame switching at 10 and 100 megabits per second (Mb/s) Ethernet. NOTE: Throughout this guide, the BayStack 28115/ADV Fast Ethernet Switch and the BayStack 28104/ADV Fast Ethernet Switches are referred to as the BayStack 281xx switch.

  • Page 16: Conventions

    Preface Conventions This section describes the conventions used in this guide. Special Message Format This guide uses the following format to highlight special messages: NOTE: This format is used to highlight information of importance or special interest. CAUTION: This format is used to highlight information that will help you prevent equipment failure or loss of data.

  • Page 17: Related Publications

    LAN within various Bay Networks switch products. • Using Optivity LAN 7.0 for UNIX (Bay Networks part number 893-568-G) This guide provides an overview of the virtual LAN features of Optivity 7.0 for UNIX and describes how to use the Optivity LANarchitect ™...

  • Page 18: Ordering Bay Networks Publications

    Phone—International: 1-510-490-4752 • Fax—U.S./Canada and International: 1-510-498-2609 You can also use these numbers to request a free Bay Networks Press catalog. Customer Support Bay Networks provides live telephone technical support to our distributors, resellers, and service-contracted customers from two U.S. and three international support centers.

  • Page 19: Compuserve

    Customer Support CompuServe Bay Networks maintains an active forum on CompuServe. All you need to join us online is a computer, a modem, and a CompuServe account. We also recommend using the CompuServe Information Manager software, available from CompuServe. The Bay Networks forum contains libraries of technical and product documents designed to help you manage and troubleshoot your Bay Networks products.

  • Page 20: World Wide Web

    Bay Networks maintains a World Wide Web Home Page that you can access at the universal resource locator (URL) http://www.baynetworks.com. The Customer Support Web Server is a menu item on that Home Page. A direct connection to the Internet and a Web browser (such as Mosaic or Netscape) are required.

  • Page 21: Express Technical Support From The North America Trc

    Serving Japan Express Technical Support from the North America TRC When calling the Bay Networks North America TRC, use Express Routing Code #140 to obtain express technical support for the BayStack 281xx switch. Entering the express code expedites your call through the menuing system and routes it directly to the support group that is best qualified to answer your...
  • Page 22 Preface 893-00965-A...

  • Page 23: Chapter 1 Overview Of The Baystack 281Xx Fast Ethernet Switch

    Chapter 1 Overview of the BayStack 281xx Fast Ethernet Switch The BayStack 281xx Fast Ethernet Switch is designed to provide frame-switching technology at Fast Ethernet speeds. This combination of technologies enhances existing network performance and supports future network expansion. Some Ethernet frame switches support only a single dedicated station per port. This limitation prevents users or network designers from attaching Ethernet hubs to the frame switch or from using the frame switch to connect shared-media hubs in wiring closets.

  • Page 24: Features

    • Configuration and status reporting through service port and front panel display • Management by Bay Networks OptivityLAN 7.0 (or later) for UNIX and Optivity Campus 6.0 (or later) for Windows network management software • Internal throughput of up to 2 gigabits per second (Gb/s) •...

  • Page 25: Baystack 281Xx Switch Components

    BayStack 281xx Switch Components BayStack 281xx Switch Components The BayStack 281xx switches are physically identical except for the model number and the type of connectors on the front panel (see Figure 1-1). 28115/ADV Operat i onal:RUN Partition Link HSp Link HSp Link HSp Link HSp Part Col...

  • Page 26: Expansion Ports

    Overview of the BayStack 281xx Fast Ethernet Switch Advanced configuration and management operations require Optivity LAN 7.0 (or later) for UNIX and Optivity Campus 6.0 (or later) for Windows network management software. Refer to the Optivity user documentation for complete information.

  • Page 27: Attachment Ports

    BayStack 281xx Switch Components For information about the Model 514/515 100 Mb/s Ethernet Transceiver, refer to Quick Installation and Reference for the Model 514/515 100 Mb/s Ethernet Transceiver. 3 Attachment Ports The attachment ports on the front of the switch can be used to connect the BayStack 281xx switch to individual stations, to LAN segments that include multiple stations, and to other BayStack 281xx switches.

  • Page 28: Leds

    Overview of the BayStack 281xx Fast Ethernet Switch 4 LEDs The LEDs on the front of the switch display port status and configuration information. Each attachment port has four LEDs, and each expansion port has one LED, as shown in Figure 1-2.

  • Page 29: Attachment Port Leds

    BayStack 281xx Switch Components Attachment Port LEDs Each attachment port on the BayStack 281xx switch has four LEDs. Table 1-3 describes the functions of the attachment port LEDs. Table 1-3. Attachment port LEDs Color Description Link Status Green When illuminated, this LED indicates that the link is active. (Link) If operating at 10 Mb/s, this LED indicates the presence of Link integrity test pulse or data.

  • Page 30: 5 & 6 Front Panel Display And Keypad

    Overview of the BayStack 281xx Fast Ethernet Switch 5 & 6 Front Panel Display and Keypad The front panel display provides start-up diagnostics and configuration information. The keypad to the right of the front panel display is used to enter basic configuration parameters for the BayStack 281xx switch (see Figure 1-3).

  • Page 31: Rear Panel Components

    BayStack 281xx Switch Components Rear Panel Components The BayStack 281xx switch has the following components (see Figure 1-4) on the rear panel: • Power switch—Use the power switch to turn on or turn off AC power to the BayStack 281xx switch. •...

  • Page 32: Figure 1-5. Faceplate On Rear Panel Of The Baystack 281Xx Switch

    Overview of the BayStack 281xx Fast Ethernet Switch The BayStack 281xx switches also has two power supply connectors located under a faceplate on the rear panel for redundant connections to the power supply (see Figure 1-5). TO PREVENT DAMAGE, CONNECT BOTH REDUNDANT POWER CABLES.

  • Page 33: Chapter 2 Planning A Switched Network

    Chapter 2 Planning a Switched Network This chapter provides an overview of virtual networking concepts related to BayStack 281xx Fast Ethernet Switches and provides information for planning a network that includes BayStack 281xx switches, routers, and bridges. This chapter covers the following topics: •...

  • Page 34: Virtual Network Segmentation

    Planning a Switched Network The two most common technologies used to microsegment networks are routing-based microsegmentation and, more recently, switching-based microsegmentation. Though routers serve an important function in segmenting networks based on administrative boundaries, switching-based microsegmentation can offer higher performance at a lower cost and can be easier to administer.

  • Page 35: Virtual Networking With The Baystack 281Xx Switch

    Virtual Networking Overview Managing and configuring networks through network management software control is referred to as “virtual networking.” Figure 2-1 illustrates how virtual networking can be used to divide two areas of a network without changing the physical network topology. BayStack 281xx switches...

  • Page 36: Lattisspan Protocol

    Planning a Switched Network As shipped from the factory, BayStack 281xx switch ports are configured as part of a single virtual LAN, and the BayStack 281xx switch automatically forwards all frames to the appropriate destination ports. The only exceptions are broadcast and multicast frames, which are forwarded to all ports in the virtual LAN.

  • Page 37: Lattisspan Terminology

    LattisSpan Protocol LattisSpan, a Bay Networks protocol used between BayStack 281xx switches and other Bay Networks switches, is a variation of the IEEE 802.1d Spanning Tree Algorithm used by many bridges. The LattisSpan Protocol differs from the IEEE 802.1d Spanning Tree Protocol in the following ways: •...

  • Page 38: Baystack 281Xx Switch Operation

    Planning a Switched Network • Trunk port: An expansion port or attachment port used to connect two BayStack 281xx switches. • Trunk link: A link that connects two trunk ports. For the BayStack 281xx switch, trunk links can be either 100 Mb/s full-duplex or 200 Mb/s full-duplex, but not 10 Mb/s.

  • Page 39: Link Speeds

    BayStack 281xx Switch Operation Link Speeds When using the attachment ports (or the expansion ports with Model 514/515 transceivers) the connections should operate at 100 Mb/s full-duplex to achieve the greatest aggregate throughput the BayStack 281xx switch can offer, as well as to provide for greater distances between switches.

  • Page 40: Detecting A One-Way Link Transmission State

    Planning a Switched Network Detecting a One-Way Link Transmission State All BayStack 281xx switches, BayStack 28200 switches, and Model 58000 switches running switch software version 1.4 or higher can detect a one-way link transmission state during network reconfiguration. A one-way transmission is a link that can either receive data from or transmit data to another switch, but not both.

  • Page 41: Flow Control

    BayStack 281xx Switch Operation Flow Control The BayStack 281xx switch uses a proprietary flow-control feature on 100 Mb/s full-duplex links to control traffic and avoid congestion on the link. If the receive port buffer becomes full, the BayStack 281xx switch issues a flow-control signal to the device at the other end of the link to suspend transmission.

  • Page 42: Address Tables And Considerations

    Planning a Switched Network Address Tables and Considerations Network traffic typically includes frames between hosts, printers, and file servers and the user end stations that access them most frequently. The primary job of the BayStack 281xx switch is to rapidly deliver frames between these network devices by “switching”...

  • Page 43: Address Tables In A Single Baystack 281Xx Switch

    BayStack 281xx Switch Operation Address Tables in a Single BayStack 281xx Switch All BayStack 281xx switch ports are factory-configured as part of a single virtual LAN, and the switch has the capability to store 1024 MAC addresses on that virtual LAN. As additional virtual LANs are created (using Optivity network management software), each new virtual LAN is allotted memory to store an additional 1024 MAC addresses.

  • Page 44: Figure 2-4. Multiple Virtual Lans Across Multiple Baystack 281Xx Switches

    LAN cannot pass frames to any other port. To take advantage of switching requires at least two ports in each virtual LAN. Bay Networks therefore recommends that you distribute virtual LANs logically across multiple...

  • Page 45: Address Tables In Multiple Baystack 281Xx Switches On The Same Network

    BayStack 281xx Switch Operation CAUTION: Implementing multiple virtual LANs across multiple switches imposes restrictions on the maximum number of MAC addresses you can have on your network. For more information about the maximum number of MAC addresses you can have on your network, see “Using Virtual LANs in BayStack 281xx Switch Communities”...

  • Page 46: Using Virtual Lans In Baystack 281Xx Switch Communities

    Planning a Switched Network If trunk links are operating at different speeds, the trunk link operating at the higher speed is designated by the switch as the active link because faster links have priority over slower links. If both trunk links are operating at the same speed, a full-duplex link has priority over a half-duplex link.

  • Page 47: Configurable Port Types

    BayStack 281xx Switch Operation For more information about the maximum allowable number of “hops” between BayStack 281xx switches in a community, see “Seven-switch Limit Between End Stations” later in this chapter. Configurable Port Types You can set up redundant connections for shared media segments connecting servers and hosts through configurable redundant feeder ports.

  • Page 48: Auto Mode

    Planning a Switched Network The link that connects LattisSpan feeder ports is a LattisSpan feeder link. The feeder link carries traffic for a single virtual LAN. Feeder ports learn the addresses of all end stations on the segment connected to the port; therefore, connectivity is provided to the end stations on that segment.

  • Page 49: Feeder Port Priority Assignment

    BayStack 281xx Switch Operation Feeder Port Priority Assignment The LattisSpan forced feeder detection process enables the switch to select active feeder ports based on prioritized attributes. Decisions are made in the following order: • Master switch priority values are examined—the switch with the lower master switch priority value has the higher priority.

  • Page 50: Redundant Feeder Link Configurations

    Planning a Switched Network BayStack 28104/ADV switch Server Port 1 Port 2 Port 3 (10 Mb/s half-duplex) Ethernet segment Active feeder link Shared media hub (10 Mb/s half-duplex) Standby feeder link Workstations 6828 Figure 2-6. Sample configuration: auto port overrides forced feeder ports If the configuration shown in Figure 2-6 had all ports configured for feeder...

  • Page 51: Figure 2-7. Redundant Connections From A Single Switch To An Ethernet Segment

    BayStack 281xx Switch Operation BayStack 28104/ADV switch Port 1 Port 2 Workstations Ethernet segment Shared media hub = Active feeder = Standby feeder Server 6829 Figure 2-7. Redundant connections from a single switch to an ethernet segment Figure 2-7, the BayStack 28104/ADV switch ports 1 and 2 are connected to a repeater (hub) that contains a single Ethernet segment.

  • Page 52: Figure 2-8. Redundant Connections Of Two Switches In A Community To Two Ethernet Segments

    Planning a Switched Network Ethernet segment Workstations Workstations Switch community (one virtual LAN) BayStack 28104/ADV BayStack 28115/ADV Port 2 switch A switch B Port 2 Trunk MAC Addr 1 MAC Addr 2 Port 1 Port 1 Ethernet segment Shared media hub Port 7 = Active feeder = Standby feeder...

  • Page 53: Figure 2-9. Redundant Connections Of Three Switches In A Community To Three Ethernet Segments

    BayStack 281xx Switch Operation Figure 2-9 shows redundant connections from multiple switches in the same community to three different Ethernet segments within a hub. This configuration provides switch-level and port-level redundancy between the devices connected to three different Ethernet segments. Workstations Segment 4 Segment 5...
  • Page 54 Planning a Switched Network Figure 2-9, three BayStack 28115/ADV switches are connected by trunk links to form one switch community. The additional trunk link between switches A and C ensures that the switches remain in a single community if the trunk link between switches B and C fails.

  • Page 55: Figure 2-10. Redundant Connections Of Different Community Switches To Two Ethernet Segments

    BayStack 281xx Switch Operation Ethernet segment Workstations Switch community 1 Switch community 2 Port 3 Port 3 BayStack 28104/ADV Switch BayStack 28104/ADV Switch Port 1 Port 2 Port 1 Port 2 Ethernet segment Shared media hub = Active feeder = Standby feeder Server 6832 Figure 2-10.

  • Page 56: Multiple Switch Operation In A Duplicate Mac Address Environment

    Planning a Switched Network The newly enabled port resumes communications between the switch and the active devices on the connected Ethernet segment until the higher priority port reestablishes connection. Multiple Switch Operation in a Duplicate MAC Address Environment Identical MAC addresses are supported on multiple virtual LANs in a single switch configuration.

  • Page 57: Figure 2-11. Using Forced Feeder Ports For Switch Community Connections

    BayStack 281xx Switch Operation When a duplicate MAC address spans multiple switches in a community, connectivity problems may arise. When a device presents the same MAC address to two different switch ports, the switch learns the MAC address on two different virtual LANs associated with two different ports. In this situation, the switch cannot inform its neighbor switches of a unique virtual LAN associated with that MAC address.

  • Page 58: Figure 2-12. Using Forced Feeder Ports For Redundant Switch Community Connections

    Planning a Switched Network A feeder port from each virtual LAN of switch B is connected to a separate port on a multiport bridge/router. Network traffic specific to each virtual LAN is transmitted throughout each virtual LAN between the switch communities, while the bridge/router directs data between virtual LANs.

  • Page 59: Figure 2-13. Network Management Software Limitation To Managing Multiple Virtual Lans In Different Switch Communities

    BayStack 281xx Switch Operation Using forced feeder links to connect switches in different communities enforces a restriction on managing switches and virtual LANs through your network management software. If you are managing switches that are part of a different community (switches are connected by forced feeder links), the network management station will only manage those switch ports that share the same virtual LAN as the network management station.

  • Page 60: Connecting Switch Communities With Feeder Links In The Same Virtual Lan

    Planning a Switched Network Connecting Switch Communities with Feeder Links in the Same Virtual LAN Interconnecting different switch communities with feeder links requires careful planning and configuring. When connecting switch communities with feeder links, plan the configuration of each virtual LAN independently of the other virtual LANs.

  • Page 61: Figure 2-14. Connections Across Switch Communities Using One Edge Switch Per Community

    BayStack 281xx Switch Operation Switch community 1 BayStack 28104/ADV BayStack 28104/ADV switch A switch B Model 28104 Edge switch switch C Port 1 Port 2 Port 1 Port 2 BayStack Edge switch 28104/ADV switch D = Active feeder link BayStack 28104/ADV BayStack 28104/ADV = Standby feeder link switch E...

  • Page 62: Figure 2-15. Multiple Edge Switches Across Switch Communities

    Planning a Switched Network Figure 2-15 shows a supported configuration that uses more than one edge switch for feeder link connections between communities, with the master switch in switch community 2 having the lowest switch-priority number. In this example, switch D is the master switch. Switch community 1 Switch community 2 BayStack...

  • Page 63: Figure 2-16. Unsupported Configuration: Loop Of Switch Communities

    BayStack 281xx Switch Operation Switch community 1 BayStack 28104/ADV BayStack 28104/ADV switch A switch B Switch community 3 BayStack BayStack 28104/ADV 28104/ADV switch G Port 3 Port 1 switch C Port 1 Port 2 Port 2 Port 1 Port 2 BayStack Port 3 BayStack 28104/ADV...

  • Page 64: Figure 2-17. Connections Across Switch Communities Using A Tree Topology

    Planning a Switched Network Switch community 1 BayStack 28104/ADV BayStack 28104/ADV switch B switch A Switch community 3 Port 1 Port 2 BayStack Port 1 BayStack 28104/ADV 28104/ADV switch C switch G Port 1 Port 2 Port 2 BayStack Port 1 28104/ADV Port 2 switch H...

  • Page 65: Restrictions To Baystack 281Xx Switches In Bridged And Routed Networks

    Restrictions to BayStack 281xx Switches in Bridged and Routed Networks Restrictions to BayStack 281xx Switches in Bridged and Routed Networks Bridges and routers provide some restrictions for deploying BayStack 281xx switches and creating virtual LANs. Two core concepts about routers and switches must be understood.
  • Page 66 Planning a Switched Network If BayStack 281xx switches are connected so that LattisSpan packets from one BayStack 281xx switch traverse the internetworking device and reach another switch, the topology management software reconfigures the associated ports as trunk ports. Because trunk links between connected BayStack 281xx switches do not participate in local address learning (only global address learning), new source addresses received from the internetworking device are not learned or stored.

  • Page 67: Unsupported Configurations

    Restrictions to BayStack 281xx Switches in Bridged and Routed Networks Unsupported Configurations The following BayStack 281xx switch configurations are not supported: • A multiple segment repeater with end stations attached to the shared media is placed between two BayStack 281xx switch ports configured for auto mode.

  • Page 68: Connecting Baystack 281Xx Switches To Shared-Media Hubs

    Figure 2-18. Connecting 100BASE-T hubs to BayStack 281xx switches Figure 2-18, Bay Networks 100BASE-T shared-media hubs are attached to switches installed in two separate wiring closets. The 100 Mb/s capability of the shared-media hubs increases the throughput of each of the stations attached to the switches.

  • Page 69: Shared-Media Hub Restrictions

    Connecting BayStack 281xx Switches Shared-media Hub Restrictions Although it is possible to connect shared-media hubs to every attachment port of the switch, you need to be aware that shared-media hubs typically do not support full-duplex implementations and operate at 10 Mb/s using CSMA/CD and, thus, should not be connected to the BayStack 281xx switch using 100 Mb/s full-duplex links.
  • Page 70 Planning a Switched Network Table 2-2. Port configurations and operating mode Port type BayStack Operating mode Speed Duplex switch mode (default mode or configuration required) Attachment 28115/ADV Default mode. 10 Mb/s Half-duplex ports 28104/ADV Default mode. 100 Mb/s Half-duplex 28115/ADV and When used as trunk 100 Mb/s Full-duplex 28104/ADV...

  • Page 71: Creating Trunk Links Using Expansion Ports

    Connecting BayStack 281xx Switches Creating Trunk Links Using Expansion Ports There are two ways to use the expansion port to connect BayStack 281xx switches. One way is to use a 1 m cascade cable; the other is to use Model 514 or 515 transceivers and the transceiver cable.

  • Page 72: Creating Trunk Links Using Attachment Ports

    Planning a Switched Network When two or more BayStack 281xx switches need to be installed more than 1 meter apart, they can be connected using Model 514 or 515 transceivers. Use Model 514 transceivers for fiber links and Model 515 transceivers for UTP links, both with a transceiver cable.

  • Page 73: Address Learning Across Trunk Links

    Connecting BayStack 281xx Switches Address Learning Across Trunk Links A single BayStack 281xx switch learns the addresses of all the stations directly attached to its ports through a “local” address learning method. The BayStack 281xx switch performs local address learning by polling for new source addresses and updating the MAC address tables associated with each port.
  • Page 74 Planning a Switched Network Figure 2-20 illustrates a redundant link configuration. Model 28xxx Model 28xxx BayStack 281xx switch BayStack 281xx switch Model 515 transceivers Model 515 transceivers Model 515 Model 515 Model 515 Model 515 Model 28xxx Model 28xxx BayStack 281xx switch BayStack 281xx switch Standby link Active link...

  • Page 75: Seven-Switch Limit Between End Stations

    Connecting BayStack 281xx Switches Seven-switch Limit Between End Stations The maximum number of BayStack 281xx switches that can be connected within a switch community is 32. However, the maximum number of BayStack 281xx switches between any two end stations is seven. Figure 2-21 illustrates a switched community using the maximum number of BayStack 281xx switches between end stations.
  • Page 76 Planning a Switched Network If a network is configured with redundant links, you must make sure that every path between any two end stations has no more than seven BayStack 281xx switches (even if network traffic is redirected to another BayStack 281xx switch) because of a link or device failure.
  • Page 77 Planning for BayStack 281xx Switch Software Upgrades Planning for BayStack 281xx Switch Software Upgrades In the future, you may want to upgrade the BayStack 281xx switch software to take advantage of new features or obtain enhancements to current software features. This section includes guidelines for planning future software upgrades.
  • Page 79 Chapter 3 Installing the BayStack 281xx Switch This chapter describes the installation requirements for the BayStack 281xx switch and provides instructions for connecting devices to the BayStack 281xx switch. NOTE: When installing the BayStack 281xx switch in a network for the first time, you may need to reconfigure the devices attached to the switch (such as printers, workstations, and routers) for 100BASE-T operation if the switch ports you connect them to will also be configured for 100BASE-T operation.

  • Page 80: Figure 3-1. Package Contents

    Installing the BayStack 281xx Switch Package Contents Before installing the BayStack 281xx switch, verify that the package contains the following items in addition to this using guide (see Figure 3-1): • BayStack 281xx switch • Power cable • Cascade cable •...

  • Page 81: Figure 3-2. Placing The Baystack 281Xx Switch On A Desktop

    Installation Procedures Installation Procedures This section provides instructions for installing the BayStack 281xx switch on a tabletop or in a standard 19-inch utility rack. Installing the BayStack 281xx Switch on a Tabletop or Shelf If you are installing the BayStack 281xx switch on a tabletop or shelf, allow at least 2 inches on each side, 5 inches at the rear, and 2 inches above the unit for proper ventilation, as shown in Figure...

  • Page 82: Figure 3-3. Attaching Brackets To The Baystack 281Xx Switch

    Installing the BayStack 281xx Switch To install the BayStack 281xx switch in a utility rack, follow these steps: Using a #1 Phillips screwdriver, remove the four screws from only one side of the BayStack 281xx switch. Do not remove the cover. Align the screw holes in the bracket with the mounting holes in the switch;...

  • Page 83: Figure 3-4. Installing The Baystack 281Xx Switch Into A Rack

    BayStack 281xx switch to the rack. NOTE: You can install the optional cable guide using the two #10-32 x 3/4-inch screws, where you ordinarily insert the mounting screws. See your Bay Networks representative for information about ordering the optional cable guide. 893-00965-A...

  • Page 84: Figure 3-5. Connecting The Power Cable To The Power Receptacle

    Installing the BayStack 281xx Switch Connect the appropriate end of the power cable to the power receptacle on the BayStack 281xx switch, as shown in Figure 3-5. Power switch Power fuse Power receptacle 4808.2 Figure 3-5. Connecting the power cable to the power receptacle Connect the other end of the power cable to a wall receptacle.
  • Page 85 Installation Procedures Connecting a BayStack 281xx Switch to a Model RPSU Redundant Power Supply Unit This section provides instructions for connecting your BayStack 281xx switch to a Model RPSU power supply unit. For more information about power supply operations, refer to the documentation that shipped with your Model RPSU power supply.

  • Page 86: Figure 3-6. Removing The Faceplate From The Rear Of The Baystack 281Xx Switch

    Installing the BayStack 281xx Switch Using a Phillips screwdriver, remove the screws that attach the faceplate (that covers the power supply DC connectors) to the rear panel of the BayStack 281xx switch (see Figure 3-6). Set the faceplate aside. 6326 Figure 3-6.

  • Page 87: Figure 3-7. Connecting The Dc Cables To The Power Supply

    Installation Procedures Connector 4 Connector 3 Connector 2 Connector 1 6327 Figure 3-7. Connecting the DC cables to the power supply Connect the other end of the DC cables to the DC connectors on the BayStack 281xx switch. (See Figure 3-8.) Note that the pins of the DC connector are not identical across the upper and lower rows of the connector.

  • Page 88: Figure 3-9. Turning On The Ac Power To The Baystack 281Xx Switch

    Installing the BayStack 281xx Switch Turn on the AC power to the BayStack 281xx switch by pressing the toggle switch on the back panel of the switch. (See Figure 3-9.) Power switch Power fuse Power receptacle 6329 Figure 3-9. Turning on the AC power to the Baystack 281xx switch The LEDs on the BayStack 281xx switch light briefly and the front panel display shows a series of self-test messages.

  • Page 89: Figure 3-11. Rpsu Power Switches

    Installation Procedures Turn on both power switches on the rear panel of the power supply. (See Figure 3-11.) Power switches 6331 Figure 3-11. RPSU power switches The Redundant Power LEDs on the front panel of the power supply unit light for all DC connectors (1, 2, 3, and 4) to indicate that each DC connector is capable of delivering power.

  • Page 90: Figure 3-13. Turning Off Rpsu Power Switches

    Installing the BayStack 281xx Switch NOTE: If the Hub Power LEDs do not light after the BayStack 281xx switch is connected to the RPSU, check that the power switch located on the rear of the BayStack 281xx switch has been turned on. If the power has been turned on and the LEDs still do not light, the internal power supply of the switch has failed and should be replaced.

  • Page 91: Figure 3-14. Turning Off The Ac Power To The Baystack 281Xx Switch

    After Installing the Hardware Turn off the AC power to the BayStack 281xx switch by pressing the toggle switch on the back panel of the switch. (See Figure 3-14.) Power switch BayStack 28104/ADV switch To AC power RPSU To AC power 6443 Figure 3-14.
  • Page 92 Installing the BayStack 281xx Switch Attaching Devices to the Baystack 281xx Switch This section provides information and instructions for attaching devices to the BayStack 281xx switch. For more information about network design using the BayStack 281xx switch, see “Connecting BayStack 281xx Switches” in Chapter 2, “Planning a Switched Network.”...

  • Page 93: Figure 3-15. Connecting The Service Port

    Attaching Devices to the Baystack 281xx Switch Partition Link HSp Link HSp Part Col Part Col Service Port 5990 Figure 3-15. Connecting the service port The service port uses an RJ-45 connector and RS-232 signaling with the following default parameters: •...

  • Page 94: Figure 3-16. Connecting A Workstation To An Attachment Port (Baystack 28104/Adv)

    Installing the BayStack 281xx Switch Connecting Individual Workstations, Servers, or Ethernet Devices The type of cable you use to connect workstations or other Ethernet devices to the BayStack 281xx switch is determined by the model of the BayStack 281xx switch and the segment distance between the Ethernet device and the BayStack 281xx switch.

  • Page 95: Figure 3-17. Connecting The Expansion Cable To The Transceiver

    Attaching Devices to the Baystack 281xx Switch Connecting a Fast Ethernet Transceiver To connect the Model 514/515 100 Mb/s Ethernet Transceiver to the BayStack 281xx switch, follow these steps: Place the transceiver on a table, allowing 2 inches on the top and the sides for proper ventilation.

  • Page 96: Figure 3-18. Connecting The Transceiver Cable To The Baystack 281Xx Switch

    Installing the BayStack 281xx Switch Partition Link HSp Link HSp Part Col Part Col Service Port 4806.1 Figure 3-18. Connecting the transceiver cable to the BayStack 281xx switch Figure 3-19 illustrates the completed connection between the transceiver and the BayStack 281xx switch. BayStack 281xx switch Partition Expansion ports...
  • Page 97 Attaching Devices to the Baystack 281xx Switch Check the Power LED on the transceiver to verify the connection to the BayStack 281xx switch. The transceiver Power LED should light as soon as the BayStack 281xx switch has been turned on. The transceiver receives its power from the BayStack 281xx switch;...
  • Page 98 Installing the BayStack 281xx Switch Connecting Switches Using Two Model 514 Transceivers (Fiber) To connect two BayStack 281xx switches using two Model 514 transceivers, follow these steps: Connect the expansion ports on each Model 514 transceiver to an expansion port on each BayStack 281xx switch using the transceiver cables provided with the Model 514 transceivers.

  • Page 99: Figure 3-22. Connecting Two Baystack 281Xx Switches From Attachment Port To Expansion Port

    Attaching Devices to the Baystack 281xx Switch To connect the BayStack 281xx switches from an attachment port to an expansion port, follow these steps (see Figure 3-22). Connect the expansion port on a Model 515 or 514 transceiver to an expansion port on one BayStack 281xx switch using the transceiver cable provided.

  • Page 100: Figure 3-23. Connecting Baystack 281Xx Switch Attachment Ports With A Crossover Cable

    Installing the BayStack 281xx Switch Connecting Switches from Attachment Port to Attachment Port One method of connecting BayStack 281xx switches that are more than 1 meter apart uses a Category 5 UTP crossover cable or a 62.5 micron fiber cable, connected to an attachment port on each BayStack 281xx switch (see Figure 3-23).
  • Page 101 Chapter 4 Configuring the BayStack 281xx Switch This chapter provides the following information for configuring the BayStack 281xx switch: • Default configuration parameters • Configuring the minimum system parameters • Using the service port menus • Using the front panel display and keypad After installing the BayStack 281xx switch, you must configure a set of minimum system parameters.

  • Page 102: Table 4-2. Expansion Port Duplex Configurations

    Configuring the BayStack 281xx Switch Table 4-1. Configuration parameters Configure from: Parameter name Default setting Service port Front panel Attachment port speed 10 Mb/s (28115/ADV) 100 Mb/s (28104/ADV) Attachment port mode Half-duplex IP address (at initial 0.0.0.0 installation) Default gateway address 0.0.0.0 Subnet mask 255.255.255.0...
  • Page 103 For this configuration, make sure that the subnet reference in the IP address of your BayStack 281xx switch matches that of your Optivity network management station. To avoid connectivity related problems, Bay Networks also recommends that the IP addresses of all switches in a switch community reside on the same subnet.

  • Page 104: Figure 4-1. Service Port Menu Map

    Configuring the BayStack 281xx Switch Using the Service Port Menus This section describes how to use the service port menus to configure the BayStack 281xx switch. (See “Connecting a Service Port Terminal” in Chapter 3, “Installing the BayStack 281xx Switch,” for instructions on connecting a terminal to the BayStack 281xx switch service port.) Service Port Menu Overview This section describes the service port menu organization and how to display...
  • Page 105 Using the Service Port Menus Service Port Startup Messages The following messages are displayed on the service port terminal when the BayStack 281xx switch is powered on. Power-up Diagnostics Version 1.4.2 Created: Mar 20 1996 17:28:50 System CPU test: PASSED System memory test (2M): PASSED Timer test: PASSED Console port test: PASSED...

  • Page 106: Figure 4-2. Service Port Main Menu

    Configuring the BayStack 281xx Switch Displaying the Main Menu After the system messages have been displayed, press [Enter] to display the main menu, as shown in Figure 4-2. System Up Time: 1 D-12H-22M-11S IP Address: 134.177.202.133 (M) MAC Address: 00008128afa0 Default Gateway: 134.177.202.129 Switch Software Version: 1.4.2 Subnet Mask: 255.255.255.192...

  • Page 107: Table 4-3. Menu Header Information

    Using the Service Port Menus Table 4-3. Menu header information Item Description System Up Time The time elapsed since last power up or reset. MAC Address The 6-byte MAC address of the BayStack 281xx switch (hexadecimal notation). Switch Software The release software version. Version IP Address The Internet address of the BayStack 281xx switch.

  • Page 108: Figure 4-3. System Information Screen

    Configuring the BayStack 281xx Switch Displaying System Information Choose System Information from the main menu to display the current information, as shown in Figure 4-3. System Up Time: 1 D-12H-22M-11S IP Address: 134.177.202.133 [M] MAC Address: 000081000201 Default Gateway: 134.177.202.129 Switch Software Version: 1.4.2 Subnet Mask: 255.255.255.0 System Information...
  • Page 109 Using the Service Port Menus Table 4-4. System information fields Field Description Switch Software Image Displays the software image version available in the system. Version Switch Revisions Displays baseboard hardware revision, clock speed, and firmware version. Switch Mode Displays the switch mode for the BayStack 281xx switch. Basic mode is the default mode.

  • Page 110: Figure 4-4. Local Vlan Information Screen

    Configuring the BayStack 281xx Switch Displaying Local Virtual LAN Information If there are virtual LANs (VLANs) defined as part of the BayStack 281xx switch, the switch mode is automatically displayed as virtual mode. To display the virtual LAN information for the BayStack 281xx switch, choose Switch Mode from the System Information screen.
  • Page 111 Configuring Basic System Parameters Configuring Basic System Parameters Use the Configuration Parameters menu to configure the following basic system parameters for the BayStack 281xx switch: • IP address • Default gateway address • Subnet mask • Master switch priority • Port speed and duplex mode To configure these parameters for a BayStack 281xx switch, follow these steps: In the Main Menu, choose Configuration Parameters.

  • Page 112: Figure 4-6. Switch Parameters Menu

    Configuring the BayStack 281xx Switch In the Configuration Parameters menu, choose Switch Parameters. The Switch Parameters menu is displayed, as shown in Figure 4-6. System Up Time: 1 D-12H-22M-11S IP Address: 134.177.202.133 [M] MAC Address: 000081000201 Default Gateway: 134.177.202.129 Switch Software Version: 1.4.2 Subnet Mask: 255.255.255.0 Switch Parameters Modify IP Address [134.177.202.133]...

  • Page 113: Figure 4-7. Reset System Menu

    Configuring Basic System Parameters Press [Ctrl]+P to display the main menu. In the Main Menu, choose Reset System. The Reset System menu is displayed, as shown in Figure 4-7. System Up Time: 1 D-12H-22M-11S IP Address: 134.177.202.133 [M] MAC Address: 000081000201 Default Gateway: 134.177.202.129 Switch Software Version: 1.4.2 Subnet Mask: 255.255.255.0...

  • Page 114: Table 4-5. Switch Parameter Options

    Configuring the BayStack 281xx Switch Table 4-5 describes the parameter options available from the Switch Parameters menu. Table 4-5. Switch parameter options Menu Change option Description effective Modify IP Address Modifies the IP address of the BayStack 281xx After reset switch.
  • Page 115 Configuring Basic System Parameters Modifying the Master Switch Priority A master switch is assigned in a network that includes more than one BayStack 281xx switch. Only one master switch is allowed per switch community. The master switch gathers virtual LAN information from other BayStack 281xx switches in the community and communicates this information to the network management station that manages them.
  • Page 116 Configuring the BayStack 281xx Switch NOTE: In communities with different LattisSpan switches that are managed by Optivity network management software, make sure the master switch is running switch software version 1.4.2 (or later). If a master switch is running an earlier version of switch software, Optivity will not manage the switches that are running software version 1.4.2 (or later).

  • Page 117: Figure 4-8. Switch Port Type Menu

    Configuring Basic System Parameters Modifying Switch Port Type To modify the switch port type, follow these steps: Choose Configuration Parameters from the Main Menu. The Configuration Parameters menu is displayed. Choose Switch Parameters from the Configuration Parameters menu. The Switch Parameters menu is displayed. Choose Modify Switch Port Type from the Switch Parameters menu.
  • Page 118 Configuring the BayStack 281xx Switch Choose the port you want to change. The system displays the current type (Auto or Feeder) for that port and prompts you to change the port type. The current port type is highlighted, and the port type options are displayed unhighlighted at the bottom of the list of ports.

  • Page 119: Figure 4-9. Switch Port Speed And Duplex Mode Menu

    Configuring Basic System Parameters System Up Time: 1 D-12H-22M-11S IP Address: 134.177.202.133 [M] MAC Address: 000081000201 Default Gateway: 134.177.202.129 Switch Software Version: 1.4.2 Subnet Mask: 255.255.255.0 Switch Port Speed and Duplex Mode Port Speed(Mb/s) Duplex Mode Port Speed(Mb/s) Duplex Mode [100 Mb/s Half] [10 Mb/s Half] [100 Mb/s Full]...
  • Page 120 Configuring the BayStack 281xx Switch Modifying Switch Port Flow Control NOTE: Flow control is used on 100 Mb/s ports operating in full-duplex mode and on cascade ports operating at 200 Mb/s. The disable feature is used only for 100 Mb/s operation. To modify the switch port flow control, follow these steps: Choose Configuration Parameters from the Main Menu.

  • Page 121: Figure 4-10. Switch Port Flow Control Menu

    Configuring Basic System Parameters System Up Time: 1 D-12H-22M-11S IP Address: 134.177.202.133(M) MAC Address: 00008128afa0 Default Gateway: 134.177.202.129 Switch Software Version: 1.4.2 Subnet Mask: 255.255.255.192 Switch Port Flow Control Port Flow Control Port Flow Control [Enable] [N/A] [Enable] [Disable] [N/A] [Disable] [N/A] [Disable]...

  • Page 122: Figure 4-11. Switch Port Speed And Duplex Mode Menu

    Configuring the BayStack 281xx Switch Modifying the Expansion Port Speed and Duplex Mode The expansion port speed and duplex options are: • 200 Mb/s at full-duplex. The port operates in this mode when a cascade cable is connected, regardless of user configuration. •...
  • Page 123 Configuring Basic System Parameters Choose the port you want to change. The system displays the current speed and duplex mode of that port and prompts you to enter a new speed and duplex mode. Choose the port speed and duplex mode. The system prompts you for confirmation.

  • Page 124: Figure 4-12. Boot Parameters Menu

    Configuring the BayStack 281xx Switch To modify the boot parameters, follow these steps: In the Main Menu, choose Configuration Parameters. In the Configuration Parameters menu, choose Boot Parameters. 4-12. The Boot Parameters menu is displayed, as shown in Figure System Up Time: 1 D-12H-22M-11S IP Address: 134.177.202.133 [M] MAC Address: 000081000201 Default Gateway: 134.177.202.129...

  • Page 125: Figure 4-13. Selecting A Boot Mode From The Boot Parameters Menu

    Configuring Basic System Parameters Choose Modify Boot Mode. The system prompts you to select either Local or Network mode, as shown Figure 4-13. System Up Time: 1 D-12H-22M-11S IP Address: 134.177.202.133 [M] MAC Address: 000081000201 Default Gateway: 134.177.202.129 Switch Software Version: 1.4.2 Subnet Mask: 255.255.255.0 Boot Parameters Modify Boot Mode [Local]...
  • Page 126 Configuring the BayStack 281xx Switch Table 4-6 describes the Boot Parameter menu options. Table 4-6. Boot parameter options Menu Description Change option effective Modify Boot Mode Specifies the source of the Baystack 281xx Immediately switch boot parameters, either Local or Network, (using the BootP protocol) to be used at the next system reset.

  • Page 127: Figure 4-14. Snmp Parameters Menu

    Configuring Basic System Parameters Configuring SNMP Parameters The read and read/write community strings are used by the SNMP agent to control requests for information about and access to management information for the BayStack 281xx switch. The SNMP parameters can only be modified from the service port menu, they cannot be changed remotely from a network management station.

  • Page 128: Table 4-7. Snmp Parameter Options

    Configuring the BayStack 281xx Switch Choose the option for the community string you want to modify. The current community string is displayed and the system prompts you to enter a new string. Enter the new community string and confirm your entry. The new information is effective immediately.

  • Page 129: Figure 4-15. Reset System Menu

    Configuring Basic System Parameters To reset the BayStack 281xx switch without downloading a new boot image file, follow these steps: In the Main Menu, choose Reset System. The Reset System menu is displayed as shown in Figure 4-15. System Up Time: 1 D-12H-22M-11S IP Address: 134.177.202.133(M) MAC Address: 00008128afa0 Default Gateway: 134.177.202.129...
  • Page 130 Configuring the BayStack 281xx Switch Select either Soft Reset or Hard Reset. The system prompts you to confirm your entry. The BayStack 281xx switch immediately suspends the transmission of network traffic upon issuance of this command. Network operation is resumed upon completion of the reset.

  • Page 131: Table 4-8. Image Option Settings

    Configuring Basic System Parameters Selecting Boot Image Version You can use the Reset System menu to select one of two switch software images to load and execute the next time a switch software image is reset. Table 4-8 lists and describes the images you can select. Table 4-8.
  • Page 132 Configuring the BayStack 281xx Switch Scheduling Image Reboot To schedule a time to reboot the switch, follow these steps: Choose Schedule Image Reboot from the Reset System menu. The Reset System menu prompts you to enter the scheduled reboot time. Enter how much later in days, hours, and minutes the switch will be rebooted (D:H:M).

  • Page 133: Figure 4-16. Front Panel Display And Keypad

    Using the Front Panel Display and Keypad Keypad Functions Use the keypad to the right of the front panel to access the front panel display, as shown in Figure 4-16. Front panel display Operat i onal:RUN Keypad 4852 Figure 4-16. Front panel display and keypad Press the keypad keys separately or in combination to perform the tasks as specified in Table...

  • Page 134: Table 4-10. System Boot And Initialization Messages

    Configuring the BayStack 281xx Switch Front Panel Display Startup Messages The front panel display provides informational messages when the BayStack 281xx switch is started. Tables 4-10, 4-11, and 4-12 describe these messages. Table 4-10. System boot and initialization messages Message System activity System Diag...

  • Page 135: Table 4-11. System Load Cycle Messages

    Using the Front Panel Display and Keypad Table 4-11. System load cycle messages Message System activity FLASH ERASE Erasing flash memory if necessary. FLASH LOAD Loading main program on flash memory if necessary. FLASH CHECKSUM Calculating checksum for flash memory. BOOTP Performing the BootP function to obtain IP address and downloaded image file name from the boot server if...
  • Page 136 Configuring the BayStack 281xx Switch One-Way Link Detection Message All BayStack 281xx switches can detect a one-way link transmission, where a link can either receive data from or transmit data to another switch, but not both. When a one-way link is detected, the problem link is identified in a message on the front panel display.

  • Page 137: Figure 4-18. Switch Parameters Menu Map

    Using the Front Panel Display and Keypad Switch Parameters Switch IP Addr Current IP Addr Next IP Addr Exit IP Submenu Gateway Addr Current Gtway IP Next Gateway IP Exit Gtway IP Menu Subnet Mask Current Net Mask Switch Priority Next Net Mask Exit Switch Menu Exit Subnet Menu...
  • Page 138 Configuring the BayStack 281xx Switch IP Address Input Example The following procedure is an example of how to use the front panel display and keypad. The procedure assumes that you have installed the hardware and have turned on the power to the BayStack 281xx switch. To input the IP address information, follow these steps: Press all three keypad keys at the same time to start the display.
  • Page 139 Using the Front Panel Display and Keypad 10. Press the top or bottom key until the character you want is displayed. NOTE: If you were modifying a value that uses special or alphabetic characters, you could press the top and middle keys at the same time to select a new character set (integers 0-9, upper- and lowercase alphabet, or special ASCII characters).
  • Page 141 Appendix A Technical Specifications This appendix provides the technical specifications and connector pin-outs for the BayStack 281xx switches. Data Rate Attachment ports (2): 10 or 100 Mb/s for BayStack 28115/ADV 100 Mb/s for BayStack 28104/ADV Interface Attachment ports (16): 100BASE-TX /10BASE-T RJ-45 connections (MDI-X) for BayStack 28115/ADV switch (8): 100 BASE-FX SC connections for BayStack 28104/ADV switch...
  • Page 142 Technical Specifications Environmental Specifications Operating temperature: 5º to 40º C, RH of 5% to 85% Operating humidity: 85% maximum relative humidity, noncondensing Operating altitude: 10,000 ft. (3,048 m), 40º C maximum Storage temperature: -25º to 70º C Storage humidity: 95% maximum relative humidity, noncondensing Free fall/drop: ISO 4180-2, NTSA 1A Vibration:...

  • Page 143: Table A-2. Service Port Connector Pin Assignments

    Connector Pin-out Information This section provides the pin-out information for the attachment and service port connectors for the BayStack 281xx switches. Attachment Port The RJ-45 port connectors used for each attachment port of the BayStack 28115/ADV switch have the pin assignments listed in Table A-1.

  • Page 144: Table A-3. Console Cable Pin Assignments

    Technical Specifications Console Cable lists a typical pin-to-pin assignment for the (DB-9 to RJ-45) console cable used to connect a service port terminal to the BayStack 281xx switch. Table A-3. Console cable pin assignments Signal RJ-45 pin DB-9 pin Signal number number shows the pin assignment for the console cable as described in...
  • Page 145 The following Declaration of Conformity for the BayStack 281xx Fast Ethernet Switch complies with ISO/IEC Guide 22 and EN 45014. The declaration identifies the product, the Bay Networks name and address, and the applicable specifications that are recognized in the European community.
  • Page 147 2-16 auto mode (port configuration), description 4-16 community boundary 4-27 community strings xvii CompuServe bandwidth configuration Bay Networks Press guidelines BayStack 28104/ADV switch 1-8, 4-2 parameters BayStack 28115/ADV switch 4-28 SNMP parameters 2-33 BayStack 281xx switch, restrictions 2-35 unsupported...
  • Page 148 Index connector expansion port 10BASE-T port configuration options 2-41 RJ-45 UTP configuring redundant trunk links 1-4, 1-7 CSMA/CD connecting switches customer support from attachment port to expansion port 3-21 3-20 using fiber transceivers 3-19 using UTP transceivers data rate description Declaration of Conformity displaying configuration option default configuration parameters...
  • Page 149 Index 2-13 topology reconfiguration process trunk link global address learning 2-15 definition 2-13 between switches 2-15 detection process 2-34 definition duplicate MAC address environment grounding BayStack 281xx switch 2-24 2-26 MAC address maximum LEDs half-duplex mode collision/congestion hardware expansion port features high speed reset...
  • Page 150 Index 1-5, 3-14, 3-19, 3-21 Model 515 transceiver port modes attachment 2-16 auto configurations 2-16 2-16 feeder auto mode 2-16 modifying feeder mode 4-18 4-18, 4-22 attachment port speed duplex mode 4-24 1-4, 3-19 boot parameters expansion 4-18 duplex mode service 4-22 4-18, 4-22...
  • Page 151 Index 1-5, A-3 RJ-45 connector pin assignments link speed router-based microsegmentation operation routers seven-switch limit between 2-33 2-43 in broadcast domain end stations 2-33 with bridging software enabled switch community definition interconnecting communities with feeder 2-28 links safety agency approvals 2-26 maximum number of addresses segment length...
  • Page 152 Index trunk links virtual networking 2-41 redundant configuration defined 2-40 using attachment ports illustration 2-39 using expansion ports overview 2-16, 4-9 trunk port segmentation 3-15 VT100 unicast frame xviii unsupported configurations World Wide Web 2-35 exceeding MAC address limits 2-31 loop of switch communities 2-35 repeater between two switches...

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