893-839-CBook Page i Thursday, December 12, 1996 4:18 PM Using the BayStack 100-series Hubs Part No.
893-839-CBook Page ii Thursday, December 12, 1996 4:18 PM © 1996 by Bay Networks, Inc. All rights reserved. Trademarks Optivity is a registered trademark of Bay Networks, Inc. Bay Networks, BayStack, BaySecure, PhonePlus, Expanded View, Autotopology, SmartSwap, and Bay Networks Press are trademarks of Bay Networks, Inc. Other brand and product names are registered trademarks or trademarks of their respective holders.
893-839-CBook Page iii Thursday, December 12, 1996 4:18 PM Ordering Bay Networks Publications To purchase additional copies of this document or other publications for Bay Networks™ products, order by part number from Bay Networks Press™ at the following numbers. You may also request a free catalog of Bay Networks Press product publications.
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893-839-CBook Page v Thursday, December 12, 1996 4:18 PM Contents Chapter 1 Quick Reference Information BayStack-specific Terms 1-1 List of Features 1-2 Hub Components 1-4 RJ-45 10BASE-T 1-8 Telco 10BASE-T 1-9 ST 10BASE-FL 1-11 AC Power Connector 1-13 DC Power Connector 1-13 Chapter 2 Installing and Stacking BayStack Hubs Installing a BayStack Hub 2-1 Installing Optional Modules 2-1 Installing a Hub on a Table or Shelf 2-2 Installing a Hub in a Rack 2-2 Installing a Hub on a Wall 2-4 Completing the Insta
893-839-CBook Page vi Thursday, December 12, 1996 4:18 PM Chapter 4 Operating a Stack of Hubs Automatic Hub Configuration 4-1 Swapping a Hub in a Stack 4-2 Using the Communications Port 4-3 Connecting the Communications Port to a Terminal, PC, or Modem 4-3 Monitoring Startup Diagnostics through the Communications Port 4-4 Configuring the NMM from a Management Console 4-4 Troubleshooting a Communications Port Connection 4-5 Appendix A Technical Specifications Declaration of Conformity A-4 Appendix B Con
893-839-CBook Page vii Thursday, December 12, 1996 4:18 PM Figures Figure 1-1. Figure 1-2. Figure 1-3. Figure 1-4. Figure 1-5. Figure 1-6. Figure 1-7. Figure 1-8. Figure 1-9. Figure 1-10. Figure 1-11. Figure 2-1. Figure 2-2. Figure 2-3. Figure 2-4. Figure 2-5. Figure 2-6. Figure 2-7. Figure 2-8. Figure 3-1. Figure 3-2.
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893-839-CBook Page xi Thursday, December 12, 1996 4:18 PM Tables Table 1-1. Table 1-2. Table 1-3. Table 1-4. Table 1-5. Table 1-6. Table 1-7. Table 3-1. Table 3-2. Table 4-2.
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893-839-CBook Page 1 Thursday, December 12, 1996 4:18 PM Chapter 1 Quick Reference Information Congratulations on your purchase of a BayStack™ 100-series hub, a stackable Ethernet repeater with multisegment cascade and management expansion capability. Your 100-series hub is part of the BayStack family of networking products from Bay Networks™. For more information on the complete line of BayStack products, contact your Bay Networks dealer.
893-839-CBook Page 2 Thursday, December 12, 1996 4:18 PM Quick Reference Information List of Features BayStack 100-series hubs have the following features: • 10 Mb/s Ethernet ports with the following connector options: – RJ-45 10BASE-T (12- and 24-port options) • An MDI-X/MDI button on the RJ-45 hubs allows you to connect two hubs without using a crossover cable.
893-839-CBook Page 3 Thursday, December 12, 1996 4:18 PM List of Features • The BayStack 100-series Advanced Network Management Module (Advanced NMM) provides all of the features of the Standard NMM, plus Advanced management features, all nine groups of RMON, and Autotopology™ for a selected segment.
893-839-CBook Page 4 Thursday, December 12, 1996 4:18 PM Quick Reference Information Hub Components This section describes the BayStack 100-series hub product line and their respective components, in the order they are numbered in Table 1-1. Table 1-1.
893-839-CBook Page 5 Thursday, December 12, 1996 4:18 PM Hub Components 1 2 1 5 4 4 104 1 – 12 13 – 24 Pwr Stat Exp RPS Seg1 Seg2 Seg3 Isol Comm Port A Media Adapter 10BASE-T Hub Data – 1 3 – Hub – Exp Col – 1 2 5 10 3 5 20 >30 10 >15 A B 1 3 5 7 9 11 13 15 17 19 21 23 2 4 6 8 10 12 14 16 18 20 22 24 Media Adapter – B 7369 Figure 1-3.
893-839-CBook Page 6 Thursday, December 12, 1996 4:18 PM Quick Reference Information 1 Media Adapter Slots Media adapter slots A and B are available for optional media adapter modules (see Figure 1-7). These 10BASE-T, AUI, 10BASE2, and fiber adapters provide flexible backbone connectivity or redundant links. Each slot has a corresponding status LED (Media Adapter A, B) on the LED display. Filler panels cover the slots when not in use.
893-839-CBook Page 7 Thursday, December 12, 1996 4:18 PM Hub Components Table 1-3 shows the different connection options available using the communications port. For more information about this port, see “Using the Communications Port” on page 4-3. Table 1-3.
893-839-CBook Page 8 Thursday, December 12, 1996 4:18 PM Quick Reference Information 4 Ethernet Ports BayStack 100-series hubs provide 10 megabit per second (Mb/s) Ethernet ports in RJ-45, telco, and fiber optic connector options. RJ-45 10BASE-T The BayStack Model 101 and Model 106 hubs have 12 10BASE-T RJ-45 ports. The BayStack Model 102 and Model 107 hubs have 24 10BASE-T RJ-45 ports.
893-839-CBook Page 9 Thursday, December 12, 1996 4:18 PM Hub Components Telco 10BASE-T The BayStack Model 104 telco hub has 24 10BASE-T ports through two 12-port telco connectors. Table 1-5 lists the pinouts for ports 1 through 12. Table 1-5. Telco 50-pin D connector pin assignments ports 1–12 26 50 1 25 6731 Telco pin no. Module RJ-45 port no. pin no. Telco pin no. Rx − 1 6 26 2 Tx − 1 2 3 Rx − 2 6 4 Tx − 2 5 Rx − 6 Tx − 7 1 893-839-C Signal Signal Module RJ-45 port no.
893-839-CBook Page 10 Thursday, December 12, 1996 4:18 PM Quick Reference Information Table 1-6 lists the pinouts for ports 13 through 24. Table 1-6. Telco 50-pin D connector pin assignments ports 13-24 26 50 1 25 6731 1-10 Telco pin no. Signal Module RJ-45 port no. pin no. Telco pin no. Signal 1 Rx − 13 2 Tx − 3 Rx − 4 Module RJ-45 port no. pin no.
893-839-CBook Page 11 Thursday, December 12, 1996 4:18 PM Hub Components ST 10BASE-FL The BayStack Model 105 fiber hub straight-tip (ST) bayonet-type fiber optic cable connectors are compatible with 62.5/125 µm or 50/125 µm multimode fiber optic cables. The 10BASE-F standard permits you to use fiber optic cables up to 2000 meters long.
893-839-CBook Page 12 Thursday, December 12, 1996 4:18 PM Quick Reference Information 5 LED Display The LED display (see Figure 1-8) indicates the segment assignments and the status of the ports, power supply, processor, expansion slot, and redundant power supply unit.
893-839-CBook Page 13 Thursday, December 12, 1996 4:18 PM Hub Components Table 1-8. BayStack 100-series hub LEDs (continued) LED label Action Meaning Data % Green Realtime measure of relative traffic. The more LEDs lit, the higher the traffic rate. Collision % Green Realtime measure of relative collisions. The more LEDs lit, the higher the collision rate. Seg1, Seg2, Seg3, Isol (Segment) Green (1) Hub LEDs: Hub is assigned to the segment displayed on lighted LED.
893-839-CBook Page 14 Thursday, December 12, 1996 4:18 PM Quick Reference Information WARNING: When connecting or removing power to a −48 V DC hub, refer to Appendix B, “Connecting to a –48 V DC Power Source” for important safety and configuration information you must know before adding a −48 V DC hub to your network. For information about power specifications for the −48 V DC hubs, refer to Appendix A, “Technical Specifications.
893-839-CBook Page 15 Thursday, December 12, 1996 4:18 PM Hub Components NOTE: You can also use network management software to change a segment assignment. If you use this method, the switch setting may not match the actual segment setting. The actual segment setting is always correctly shown by the segment LEDs. Segment Select Isol 1 2 3 5880 Figure 1-9.
893-839-CBook Page 16 Thursday, December 12, 1996 4:18 PM Quick Reference Information For more information about using the management extension ports, see “Extending Management to Remote Cascades” on page 2-9. 11 Cascade Connectors Optional cascade connectors allow you to connect a stack of up to 10 hubs as a single multisegment cascade (see Figure 1-11). All hubs in the same cascade that are assigned to the same segment operate as a single Ethernet repeater.
893-839-CBook Page 1 Thursday, December 12, 1996 4:18 PM Chapter 2 Installing and Stacking BayStack Hubs This chapter outlines the procedures for installing a BayStack 100-series hub and the procedures for building and interconnecting a stack of hubs. For configuration details including LEDs, switch settings, and pin assignments, refer to Chapter 1, “Quick Reference Information.” For Ethernet and stack configuration guidelines, refer to Chapter 3, “Configuration Rules for BayStack Hubs.
893-839-CBook Page 2 Thursday, December 12, 1996 4:18 PM Installing and Stacking BayStack Hubs 1. To begin the installation process, install any optional media adapters and expansion slot modules (such as an NMM) into your hub. CAUTION: Power to the hub must be off to install optional modules. a. Bay Networks recommends that you install your NMM in the top hub of the stack. b. Make sure filler panels cover any unused slots to maintain correct air flow inside the hub.
893-839-CBook Page 3 Thursday, December 12, 1996 4:18 PM Installing a BayStack Hub 5848.1 Figure 2-1. Forward and rear rack mount bracket positions Insert the flat-head screws provided with the mounting brackets through each bracket and into the mounting holes in the hub, as shown in step 1 of Figure 2-2, and tighten the screws. Step 1 Step 2 5871.1 Figure 2-2. 2. Installing the 100-series hub in an equipment rack Attach the hub to the equipment rack.
893-839-CBook Page 4 Thursday, December 12, 1996 4:18 PM Installing and Stacking BayStack Hubs Installing a Hub on a Wall In a wall installation, Bay Networks recommends that the 100-series hub be mounted on half-inch plywood attached to the wall where you intend to install the hub. You will need a #2 Phillips screwdriver for attaching mounting brackets. To install a 100-series hub on a wall, follow these steps: 1. Attach the mounting brackets.
893-839-CBook Page 5 Thursday, December 12, 1996 4:18 PM Installing a BayStack Hub 3. Holding the hub against the plywood, align the bracket holes with the pilot holes in the wood. 4. Insert flat-head wood screws (9/16 to 1/2 inch long) through each bracket and into the pilot holes on the plywood (see Figure 2-3 step 2). 5. Tighten the screws to secure each bracket. 6. Proceed to “Completing the Installation” to finish this installation procedure.
893-839-CBook Page 6 Thursday, December 12, 1996 4:18 PM Installing and Stacking BayStack Hubs Interconnecting Your Stack The cascade and management extension ports on each hub are designed to increase the capability and flexibility of your network. Use a Bay Networks optional cascade cable between hubs that are adjacent, and use your management extension cable to extend network management to remote cascades in your stack.
893-839-CBook Page 7 Thursday, December 12, 1996 4:18 PM Interconnecting Your Stack To create a cascade of 100-series hubs, follow these steps: 1. Connect one end of the cascade cable to the Cascade Down connector on the rear panel of the top hub. 2. Connect the other end of the cascade cable to the Cascade Up connector of the hub immediately below (see Figure 2-4). 5901 Figure 2-4. Cascade cable connections in a stack of 100-series hubs 3.
893-839-CBook Page 8 Thursday, December 12, 1996 4:18 PM Installing and Stacking BayStack Hubs Pwr Stat Exp Seg1 Seg2 Seg3 RPS Isol 1 3 5 7 2 4 6 8 Hub Exp 5879.1 Figure 2-5. LED display of hub and NMM segment assignments • Changes to the segment select switch override segment selection using software. • An NMM installed in a 100-series hub can be assigned using software to a segment independent of the host hub, as shown in Figure 2-5.
893-839-CBook Page 9 Thursday, December 12, 1996 4:18 PM Interconnecting Your Stack Segment Select Isol 1 2 3 5880 Figure 2-6. Default position of the Segment Select switch is segment 1 The Segment Select switch can be set in the following ways: • To isolate the hub (Isol), set both switches down. • To set to segment 1, set the left switch down and the right switch up. • To set to segment 2, set the left switch up and the right switch down. • To set to segment 3, set both switches up.
893-839-CBook Page 10 Thursday, December 12, 1996 4:18 PM Installing and Stacking BayStack Hubs When you use the management extension ports to connect cascades, be sure to consider the following guidelines: • Your stack must not exceed a total of 10 hubs. • Management extension ports require standard (Category 3 or better) four-pair unshielded twisted pair (UTP) cable terminated with RJ-45 connectors. Bay Networks does not provide this cable.
893-839-CBook Page 11 Thursday, December 12, 1996 4:18 PM Verifying Your Installation • A standard straight-through UTP cable (MDI to MDI-X, as shown in Figure 2-8) is customarily used for connection to a workstation adapter card or transceiver. Transmit 1 1 2 2 Receive Twisted pairs Receive 3 3 6 6 MDI port Transmit MDI-X port 2008.8 Figure 2-8.
893-839-CBook Page 12 Thursday, December 12, 1996 4:18 PM Installing and Stacking BayStack Hubs • Power is connected to all hubs in the stack. • The hub and any installed modules have completed their diagnostic cycle. Checking the Diagnostic Displays When you reset or connect power to a hub, it performs the following diagnostic cycle: • All LEDs momentarily flash amber, then green, then the correct color. • Stat and Exp LEDs indicate boot status of the hub and NMM (if present).
893-839-CBook Page 1 Thursday, December 12, 1996 4:18 PM Chapter 3 Configuration Rules for BayStack Hubs This chapter provides network configuration and Ethernet compliance guidelines for BayStack 100-series hubs. Network Configuration Decisions When you design a network of BayStack 100-series hubs, take these restrictions into consideration: • Make sure your stack conforms to the BayStack 100-series hub stacking guidelines (next section).
893-839-CBook Page 2 Thursday, December 12, 1996 4:18 PM Configuration Rules for BayStack Hubs • An optional NMM can be installed to provide network management for each segment in a stack. For more information about using an NMM in your stack, refer to Using the BayStack 100-series Network Management Modules. Simple Rules for Ethernet Network Compliance The Ethernet standard has operating guidelines that are based on the number of repeaters between the most distant nodes in your network.
893-839-CBook Page 3 Thursday, December 12, 1996 4:18 PM Network Configuration Decisions • The entire Ethernet network consists of only IEEE 802.3 components, Bay Networks host modules, hubs, and transceivers using only AUI, 10BASE-T, FOIRL, 10BASE-FL, 10BASE5, or 10BASE2 cables. • Fiber optic link attenuation limits are met, and the number of connectors used in any link comply with the IEEE 802.3j specifications. • No link is longer than the IEEE 802.3 maximums listed in Table 3-1. Table 3-1.
893-839-CBook Page 4 Thursday, December 12, 1996 4:18 PM Configuration Rules for BayStack Hubs Network Path Containing Five Repeaters In the longest path containing five repeaters, the following requirements also must be met: • All links must be either 10BASE-T or fiber (10BASE-FL or FOIRL). • No transmit- or receive-end link (fiber or 10BASE-T) exceeds 100 meters. • The total of all interrepeater fiber links is 2500 meters or less. • No AUI drop cable is longer than 2 meters.
893-839-CBook Page 5 Thursday, December 12, 1996 4:18 PM Example of a Managed Multisegment Stack The three parts of the stack are operating in different rooms. The Accounting cascade is 60 meters from the Administration cascade. The Human Resources cascade is 40 meters from the Administration cascade, for a total cumulative distance of 100 meters. The Accounting cascade contains: • Four hubs. – Hubs A and B are assigned to segment 1. – Hubs C and D are assigned to segment 2.
893-839-CBook Page 6 Thursday, December 12, 1996 4:18 PM Configuration Rules for BayStack Hubs Table 3-2 summarizes how the different elements in this stack are configured. Table 3-2.
893-839-CBook Page 1 Thursday, December 12, 1996 4:18 PM Chapter 4 Operating a Stack of Hubs This chapter contains relevant information about your BayStack 100-series hub. The chapter includes information about hub configuration, swapping a hub in a stack, and using the communications port. Automatic Hub Configuration When a 100-series hub experiences a change in cascade connectivity, a reset, or a power cycle within the stack, it initiates an automatic configuration process.
893-839-CBook Page 2 Thursday, December 12, 1996 4:18 PM Operating a Stack of Hubs Swapping a Hub in a Stack To swap a hub in a functioning stack, follow these steps: CAUTION: When moving cables between hubs that are powered on, take care not to touch the cable pins to the hub chassis or to the connector shield. 1. Disconnect the primary and redundant power cord(s) from the hub you want to remove. The other hubs in the stack can be left on and will continue to function.
893-839-CBook Page 3 Thursday, December 12, 1996 4:18 PM Using the Communications Port 7. Verify your installation. See “Verifying Your Installation” on page 2-11. Using the Communications Port You can use the communications port on the front panel of the 100-series hub to configure your NMM. You can connect an ASCII-based terminal, a personal computer terminal emulator, or a modem to this port.
893-839-CBook Page 4 Thursday, December 12, 1996 4:18 PM Operating a Stack of Hubs 2. If you are connecting to a modem, refer to the documentation included with your modem for the configuration parameters for your equipment. 3. Connect the DB-9 plug end of the appropriate cable to the hub communications port and the other end of the cable to the appropriate port on the device. 4. Proceed to “Monitoring Startup Diagnostics through the Communications Port” to verify the startup diagnostic display.
893-839-CBook Page 5 Thursday, December 12, 1996 4:18 PM Using the Communications Port Troubleshooting a Communications Port Connection If the startup diagnostic message does not appear on your console when the hub is reset or powered on, verify the following items: • All hubs are powered on. • The cable you are using is correct and is firmly seated in the correct ports. To verify your cable, see “Communications Port” on page 1-6. • Your device has been correctly configured for your console or modem.
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893-839-CBook Page 1 Thursday, December 12, 1996 4:18 PM Appendix A Technical Specifications This appendix provides technical specifications for the BayStack 100-series hubs. Specifications for the BayStack 100-series Hubs Network Protocol 10 Mb/s Ethernet Standards Support IEEE 802.3 CSMA/CD IEEE 802.
893-839-CBook Page 2 Thursday, December 12, 1996 4:18 PM Technical Specifications Environmental Specifications Operating temperature: Storage temperature: Operating humidity: Storage humidity: Operating altitude: Ventilation clearance: Operating conditions: Power source availability: Recommended wiring closet service clearance: Safety Agency Approvals A-2 5° to 40° C –25° to +70° C 85% maximum relative humidity, noncondensing 95% maximum relative humidity, noncondensing 10,000 ft (3,000 m) maximum Minim
893-839-CBook Page 3 Thursday, December 12, 1996 4:18 PM Specifications for the BayStack Model 105 Fiber Hub Table A-1 lists the maximum (total) distance allowed in the fiber connection for the most common cable and connector combinations (assuming the maximum permitted attenuation with ST connectors). However, your fiber connection may have to be shorter to meet the optical power budget and Ethernet repeater rules. Table A-1.
893-839-CBook Page 4 Thursday, December 12, 1996 4:18 PM Technical Specifications Declaration of Conformity The following Declarations of Conformity for the BayStack 100-series hubs comply 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.
893-839-CBook Page 1 Thursday, December 12, 1996 4:18 PM Appendix B Connecting to a –48 V DC Power Source This appendix provides the relevant installation and reference information necessary for the installation of the power cord for the BayStack Model 107 −48 Volt DC hub and the BayStack Model 107 −48 Volt DC hub. CAUTION: This appendix contains important safety and configuration information you must know before adding BayStack 10BASE-T hubs to your network.
893-839-CBook Page 2 Thursday, December 12, 1996 4:18 PM Connecting to a –48 V DC Power Source A short spring spade tongue terminal (such as AMP part number CMA 509-3260) to connect to the positive and negative terminal leads. 7064 NOTE: Bay Networks recommends that you use crimp lug terminals that are UL listed and CSA certified to connect the conductor cables. Failure to do so could compromise voltage and temperature protection.
893-839-CBook Page 3 Thursday, December 12, 1996 4:18 PM Attaching the DC Input Ground Wire Required tools: Crimping tool and flat-tip screwdriver – + Redun dan Power t 6 gauge wire 7067 706 1. Insert 6-gauge grounding cable into the terminal and crimp tightly. 2. Screw the terminal into the ground lug attachment hole on the back panel of the hub using a #10-32× 1/2 screw. – Redun dan Power t + To DC power ground 7069 3.
893-839-CBook Page 4 Thursday, December 12, 1996 4:18 PM Attaching the Terminal Leads Required tool: Flat-tip screwdriver WARNING: Ensure that the DC power source is OFF or disconnected on the remote end before you connect the terminal leads to the hub. This task may involve switching a circuit breaker, or powering the DC input source to OFF. ! 40-56 VDC, 2.0-1. To reThis unit ce has CAUTIO discdu onne the risk mofore than ct both one D. N hi D.C. gh energy C.
893-839-CBook Page 5 Thursday, December 12, 1996 4:18 PM ! 40-56 VDC, 2.0-1. To reThis unit ce has CAUTIO discdu onne the risk mofore than ct both one D. N hi D.C. gh energy C. po powe wer su r cordlevels an pply s prio d/or fir r to se e hainput. rvice. zard Redu ndan t Powe r ! 5A +12 –12 VD VDC @ +5 VD C @ 0. 1.6A 5A C@ 7A – + Redun dan Power t 7074 7073 5. Snap the safety cover back into place over the terminals. 6.
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893-839-CBook Page 1 Thursday, December 12, 1996 4:18 PM Index Numerics B 10BASE2 segment length maximum 3-3 thin coaxial media adapter 1-2, 1-6 10BASE5 segment length maximum 3-3 10BASE-FL fiber media adapters 1-2, 1-6 port features 1-2 segment length maximum 3-3 10BASE-T media adapter 1-2, 1-6 segment length maximum 3-3 −48 V DC hub 14-22 AWG Listed copper wire B-2 cable requirements B-1 crimp lug terminals B-1 installation clearance A-2 installing the power cord B-1 power connector 1-13 reverse polari
893-839-CBook Page 2 Thursday, December 12, 1996 4:18 PM Index data flow 2-6 definition of 1-1 information carried 1-16 installing 2-7 restrictions 2-6 single repeater maximums 1-16 Collision % LEDs 1-13 collision domain.
893-839-CBook Page 3 Thursday, December 12, 1996 4:18 PM Index expansion slot 1-16 media adapter slot 1-6 FOIRL, segment length maximum 3-3 H hot swap cascade cables 4-2 NMM SmartSwap 4-1 I InfoFACTS iii installation clearance A-2 hub in a rack 2-2 on a table or shelf 2-2 on a wall 2-4 making port connections 2-5 management extension cable 2-10 media adapters 2-2 NMMs 2-2 preinstallation tasks 2-1 troubleshooting 2-12 verification process 2-11 wall-mounting brackets 2-4 Isol (isolate) LED 1-13 isolate c
893-839-CBook Page 4 Thursday, December 12, 1996 4:18 PM Index limitations 2-8 SNMP management by 2-8 Standard NMM management features 1-2 statistics 1-2 operating altitude A-2 conditions A-2 humidity A-2 temperature A-2 optical power budget 1-11 out-of-band port 1-6 RJ-45 patch cable 2-11 pin assignments 1-8 fiber optic 1-11 RJ-45 1-8 telco 1-9 position resolution, automatic 1-2 power cycle configuration process 4-1 options 1-13 redundant 1-14 source availability A-2 publications, related iii Pwr (powe
893-839-CBook Page 5 Thursday, December 12, 1996 4:18 PM Index S safety agency approvals A-2 Seg 1-3, Isol (segment) LEDs 1-13 segment assignment changing 1-14, 2-8 considerations 2-7 in cascades 2-6 of NMM 2-8 using network management software 2-7 Ethernet length maximums 3-3 select options 1-2 Segment Select switch changing, effect on hub 4-1 default 2-8 overview 1-14 using 2-7 serial management connectivity 1-15 service port 1-6 SmartSwap, definition of 4-1 SNMP management segment limitations 2-8 stat
893-839-CBook Page 6 Thursday, December 12, 1996 4:18 PM Index Index-6 893-839-C
