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Bay Networks Marlin Reference Manual

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Nautica Marlin
Bridge Reference
Guide
Part No. 302976-A Rev.00
May 1998

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  • Page 1 Nautica Marlin Bridge Reference Guide Part No. 302976-A Rev.00 May 1998...
  • Page 2 4401 Great America Parkway Santa Clara, CA 95054 Copyright © 1998 Bay Networks, Inc. All rights reserved. Printed in the USA. May 1998. The information in this document is subject to change without notice. The statements, configurations, technical data, and recommendations in this document are believed to be accurate and reliable, but are presented without express or implied warranty.
  • Page 3 name of the University may not be used to endorse or promote products derived from such portions of the software without specific prior written permission. SUCH PORTIONS OF THE SOFTWARE ARE PROVIDED “AS IS” AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  • Page 4 Nautica Marlin Bridge Reference Guide Licensee’s facility, provided they have agreed to use the Software only in accordance with the terms of this license. 3. Limited warranty. Bay Networks warrants each item of Software, as delivered by Bay Networks and properly installed and operated on Bay Networks hardware or other...
  • Page 5 restrictions set forth in subparagraph (c)(1) of the Commercial Computer Software––Restricted Rights clause of FAR 52.227-19 and the limitations set out in this license for civilian agencies, and subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause of DFARS 252.227-7013, for agencies of the Department of Defense or their successors, whichever is applicable.
  • Page 6 Nautica Marlin Bridge Reference Guide UNLESS BAY NETWORKS GIVES ITS EXPRESS WRITTEN CONSENT, INCLUDING AN EXPRESS WAIVER OF THE TERMS OF THIS AGREEMENT. 302976-A Rev.00...

  • Page 7: Table Of Contents

    About This Guide Before You Begin ...xix Conventions ... xx Acronyms ...xxi Bay Networks Technical Publications ... xxiii Bay Networks Customer Service ... xxiii How to Get Help ...xxiv Bay Networks Educational Services ...xxv Chapter 1 Understanding Bridging High Performance Ethernet Bridge ...1-2 ISDN For Resilience ...1-2 ISDN Top-up Bandwidth On Demand ...1-3 ISDN Autocall Bandwidth On Demand ...1-3...
  • Page 8 Chapter 2 Bridging Network Designs Pont-to-Point Bridge Pair Networks ...2-2 Single Link ...2-2 Installation ...2-3 Parallel Links ...2-3 Installation ...2-4 ISDN Backup ...2-5 ISDN Interconnect Only ...2-7 Multiple Bridge Pairs Network ...2-10 Installation ...2-11 Brdige Triangulation Networks ...2-12 Simple Triangulation ...2-12 Multiple Triangulation ...2-13 Resilient Links ...2-14 Fully Resilient Triangulation ...2-15...
  • Page 9 Saving Changes Via the Front Panel ...3-6 Interface Activity Bar Graph Operation ...3-7 Manager Terminal Operation ...3-7 Screen Description ...3-8 Title Line Region ...3-8 Central Menu and Form Region ...3-8 Menu Navigation Region ...3-9 Command and Response Region ...3-9 Menu Navigation ...3-10 Form Navigation And Editing ...3-12 Remote Terminal Management ...3-14 Disconnecting from the Management System ...3-15...
  • Page 10 Static ARP ...4-34 SAP Filters ...4-35 ISDN CONFIGURATION ...4-37 Bridge Authorisation ...4-39 ISDN Automatic Call Addresses ...4-40 ISDN Time Bands ...4-50 ISDN Tokens ...4-51 ISDN Numbers and Manual Calls ...4-52 Calling Line Identification ...4-55 TCP-32 WINS ...4-56 TA List ...4-58 ETSI Primary Rate TA ...4-59 USA Primary Rate TA ...4-61 SNMP Management ...4-63...
  • Page 11 Software Version ...5-3 Trace Window ...5-3 Isdn Clearing Codes ...5-5 Faultfinding Tcp/ip Networks ...5-5 Faultfinding IPX Networks ...5-6 Faultfinding Basic Rate ISDN ...5-7 302976-A Rev.00...
  • Page 12 302976-A Rev.00...
  • Page 13 Figure 2-1. Bridge Pair with Single Link 2-2 Figure 2-2. Bridge Pair with Parallel Links 2-3 Figure 2-3. Bridge Pair with ISDN Backup 2-5 Figure 2-4. Bridge Pair with ISDN Interconnect Only 2-7 Figure 2-5. Multiple Bridge Pairs 2-10 Figure 2-6. Simple Bridge Triangulation 2-12 Figure 2-7.
  • Page 14 Figure 4-4. Ports List Screen 4-6 Figure 4-5. LAN Port Configuration Form 4-9 Figure 4-6. HDLC Port Configuration Form 4-10 Figure 4-7. PPP Port Configuration Form 4-15 Figure 4-8. TA Port Configuration Form 4-16 Figure 4-9. Spanning Tree Configuration Screen 4-22 Figure 4-10.
  • Page 15 Figure 4-36. TCP/IP Statistics Menu Screen 4-78 Figure 4-37. Remote Devices Menu Screen 4-79 Figure 5-1. Trace Window Screen (Example) 5-4 302976-A Rev.00...
  • Page 16 302976-A Rev.00...
  • Page 17 Table 4-1. Common Ethernet Types 4-29 Table 4-2. Common IEEE Types 4-30 302976-A Rev.00 Tables xvii...
  • Page 18 xviii 302976-A Rev.00...

  • Page 19: About This Guide

    If you are responsible for configuring Nautica routers, you need to read this guide. You can now use the Bay Command Console (BCC) to configure Nautica routers. In this guide, you will find instructions for using the BCC. The guide also mentions other software systems used by Nautica routers including Nautica Wizard and Nautica Manager.

  • Page 20: Conventions

    Nautica Marlin Bridge Reference Guide Conventions angle brackets (< >) bold text brackets ([ ]) ellipsis points italic text quotation marks (“ ”) screen text Indicate that you choose the text to enter based on the description inside the brackets. Do not type the brackets when entering the command.

  • Page 21: Acronyms

    vertical line ( Acronyms BACP BootP CHAP DADS DHCP HDLC ISDN 302976-A Rev.00 Indicates that you enter only one of the parts of the command. The vertical line separates choices. Do not type the vertical line when entering the command. Example: If the command syntax is show -s config either...
  • Page 22 Nautica Marlin Bridge Reference Guide OSPF PPTP PSTN SNMP TCP/IP Telnet TFTP WINS xxii Multisubscriber Numbering Minimum To Configure Minimum To Distinguish Network Address Translation Open Shortest Path First (Protocol) Password Authentication Protocol Point-to-Point Protocol Point to Point Tunneling Protocol...

  • Page 23: Bay Networks Technical Publications

    Bay Networks Technical Publications You can now print technical manuals and release notes free, directly from the Internet. Go to support.baynetworks.com/ library/tpubs. Find the Bay Networks products for which you need documentation. Then locate the specific category and model or version for your hardware or software product. Using Adobe Acrobat Reader, you can open the manuals and release notes, search for the sections you need, and print them on most standard printers.

  • Page 24: How To Get Help

    Nautica Marlin Bridge Reference Guide How to Get Help If you purchased a service contract for your Bay Networks product from a distributor or authorized reseller, contact the technical support staff for that distributor or reseller for assistance. If you purchased a Bay Networks service program, call one of the...

  • Page 25: Bay Networks Educational Services

    Bay Networks Educational Services Through Bay Networks Educational Services, you can attend classes and purchase CDs, videos, and computer-based training programs about Bay Networks products. Training programs can take place at your site or at a Bay Networks location. For more information about training programs, call one of the following numbers: Region...

  • Page 27: Understanding Bridging

    The Marlin Bridge is the latest in a new generation of internetworking systems which specifically addresses the new needs of modern Networking. It allows users to take advantage of the latest technology, combined with ISDN services to provide economic, effective and resilient network solutions in today’s LAN environment.

  • Page 28: High Performance Ethernet Bridge

    “plug and play” easy installation. The Marlin Bridge is equipped with a single Ethernet LAN port and a single WAN port operating at up to 2 Mbps. The WAN port can connect to another Marlin Bridge or another member of the Nautica Bridge Series, for example, a CLAM Bridge.

  • Page 29: Isdn Top-Up Bandwidth On Demand

    ISDN calls to be cleared automatically in response to lower demand; so keeping costs to a minimum. The Marlin Bridge has both ISDN and leased connections to ensure users can test network utilisation in real time over ISDN before committing to leased circuits. Also, as traffic patterns change, leased circuits or ISDN can be added or removed at any site without needing to make equipment redundant.

  • Page 30: Protocol Routing And Spoofing

    The Marlin Bridge includes extensive diagnostic and management facilities to allow the administrator to gain knowledge of LAN and WAN operation on all local and remote bridges. The Marlin Bridge may also be managed from an Simple Network Management Protocol (SNMP) management system. 302976-A Rev.00...

  • Page 31: Security

    Marlin Bridge supports MIB II and Bridge MIB(RFC-1286). Private MIB extensions are easily ported to provide the full range of facilities. Software upgrades may be downloaded remotely from another Marlin Bridge or from a PC, using ISDN or leased circuits. Security As a public service, ISDN could open your network to unauthorised access.

  • Page 32: Optional Single And Dual Integrated Bri Isdn Terminal Adapters

    Nautica Marlin Bridge Reference Guide • The WAN4 serial port expansion option card provides four additional interfaces supporting X21 (V.11). V.24 and V.35 versions are also available. • An 8 port 10BASE-T Intergral Hub option card, letting you install the bridge as part of a hub on your Ethernet network and providing direct connections for workstations or other network devices.

  • Page 33: Optional Quad Wan Port Expansion Board

    • Use at central site for many-to-one dial-in access with no permanent link • Dynamic channel allocation based on bandwidth requirements. Optional Quad WAN Port Expansion Board • 1 to 4 WAN ports • Externally clocked DTE presentation • 2Mbps aggregate throughput Optional 8 Port 10BASE-T Hub Expansion Board •...

  • Page 35: Bridging Network Designs

    Chapter 4. The Marlin Bridge is intended as a “boundary” rather than a hub product, but all of the examples can be built with a combination of Marlin Bridge and other Nautica bridge units, or with some of the Marlin Bridge units fitted with optional expansion cards.

  • Page 36: Pont-To-Point Bridge Pair Networks

    Nautica Marlin Bridge Reference Guide Pont-to-Point Bridge Pair Networks There are four Point-to-Point Bridge Pair Network types. In the table below, click on the option you require. Single Link ISDN Backup Single Link Single Link Bridge Pair Networks are simple to install and get the network up and running quickly.

  • Page 37: Installation

    Installation The bridge hardware should be set up as a in the Installation Guide. If the default Standard Configuration is used, no other changes are required unless optional bridge features are needed. For example, to use the remote management facility, IP addresses must be assigned to the units.

  • Page 38: Installation

    Nautica Marlin Bridge Reference Guide When two bridges are connected in this way, they detect automatically that they have multiple parallel links, and ensure that frames passed between the bridges are handled correctly (using the the Multilink protocol to ensure that frames are kept in sequence).

  • Page 39: Isdn Backup

    ISDN Backup Uses on-demand connections via ISDN to avoid having circuits permanently connected even when not in use. The ISDN circuit can be used to provide bandwidth when needed (when the leased line reaches a loading threshold), and also for circuit backup inthe event of a link failure.
  • Page 40 Nautica Marlin Bridge Reference Guide The bridges use this extra capacity by sharing frames for transmission between the leased line and the ISDN channel. Frame sequence are maintained by the bridges in the same way as in the Parallel Links Bridges use as many ISDN connections as needed to handle the threshold values set for the links.

  • Page 41: Isdn Interconnect Only

    ISDN Interconnect Only Allows an ISDN connection to be set up only when there is data to transfer between two LANs. With no permanent link between the two bridges, the high costs of permanent leased lines are reduced. This network is not restricted to a pair of bridges only. Special handling of MAC addresses and specific protocols (IP, IPX, ScaNet OSI, Banyan Vines) enables a network of ISDN-only connected brdiges to be built and operated.
  • Page 42 This would be relevant if the protcol used was not a standard one. Manual calls can be made using the Marlin Bridge front panel and/or management terminal. A list of configured destination Marlin Bridges and their ISDN numbers is presented, from which the required destination can be selected.
  • Page 43 Bridging Network Designs When the ISDN numbers of the remote units are added to the CLI table, the Marlin Bridge only accepts incoming calls from these numbers (see Chapter 4). 302976-A Rev.00...

  • Page 44: Multiple Bridge Pairs Network

    Nautica Marlin Bridge Reference Guide Multiple Bridge Pairs Network Networks with more than two LANs can be created very simply. Figure 2-5. In this example, LAN 2 is the central or main LAN to which other LANs want access. LAN 1and LAN 3 are remote offices or departments that need access to the central database.

  • Page 45: Installation

    Bridging Network Designs The two bridges attached to LAN 2 learn quickly which devices are attached to the LAN and which are reached via serial links. So frames from LAN 1 for LAN 3 are sent from bridge A to bridge B, which gives the frame to LAN 2.

  • Page 46: Brdige Triangulation Networks

    Nautica Marlin Bridge Reference Guide Brdige Triangulation Networks There are several examples of bridge triangulation. In the table below, click on the option you require. Simple Triangulation Resilient Links Fully Resilient With ISDN Backup Simple Triangulation Simple Bridge Triangulation reduces the number of bridges (and the costs), while still achieving similar results to multiple bridge pairs.

  • Page 47: Multiple Triangulation

    Bridge B acts as the remote bridge for both bridges A and D, and appears to them to be a partner bridge, as in the example. Bridge B now functions as two bridges (bridges B and C from the previous example with the extra work of routing frames between LAN 1 to LAN 3 on its two serial ports, rather than placing them on LAN 2.

  • Page 48: Resilient Links

    Nautica Marlin Bridge Reference Guide Resilient Links This example shows a network that is more resilient to link failures than a simple triangulated bridge network; using an alternative path to each LAN if one of the links fails. Figure 2-8.

  • Page 49: Fully Resilient Triangulation

    To optimize this type of network, use ISDN to provide link backup, rather than paying for an unused leased line. To provide the same network topology, only two of the bridges need to have the facility, i.e. the two bridges connected by the link that would normally be unused.

  • Page 50: Fully Resilient With Isdn Backup

    Nautica Marlin Bridge Reference Guide This network operates in much the same way as the previous Resilient Links remove the network loop. If any one connection between LANs fails, because of either a link or a bridge unit failure, then STA sets up an alternative path between all LANs.
  • Page 51 Bridging Network Designs For each bridge, basic operation is almost identical to that described for the ISDN Backup example, where ISDN is used to backup failed links and provide bandwidth on demand. The ISDN numbers of the bridge’s partners must be configured in all bridges (see Chapter 4).

  • Page 52: Cost Reduced Isdn Backup

    Nautica Marlin Bridge Reference Guide Cost Reduced ISDN Backup Provides the same functions as the previous network at less cost, as the number of ISDN interfaces is reduced. This configuration allows any bridge on a LAN to ask for an ISDN connection to a bridge on the same LAN (there may be many more bridges, but ony two are shown on each LAN).
  • Page 53 Bridging Network Designs When the leased line between bridges E and F can be used again, bridge E asks bridge A to close down the ISDN connection to bridge F. Bridge A operates as a normal ISDN bridge, as it uses its own ISDN interface as a backup circuit if its link to bridge B fails.

  • Page 54: Multi-Tiered Network

    Nautica Marlin Bridge Reference Guide Multi-tiered Network This type of network reduces the number and cost of leased lines by carrying traffic from remote LANs on shared “backbone” circuits. Resilience (failure tolerance) can be built into parts of the network essential for business operations; small remote sites could be given a lower cost but less resilient service.
  • Page 55 Bridging Network Designs This example shows remote or “spur” LANs with only one link to the backbone. In such a configuration, it is usually important that the bridges on these remote LANs do not become the root bridge, or inefficient paths for most of the network traffic may be set up (to and from LAN 2 here).

  • Page 56: Autocalls For Isdn Only Lan Interconnect

    Autocalls For ISDN Only Lan Interconnect Marlin Bridge “Autocalls” make and control connections between Ethernet LANs when ony ISDN is available. The Marlin Bridge can interpret a number of different protocols to find out when it should set up and close down ISDN connections.

  • Page 57: Tcp/Ip Autocalls

    IP packet will make the line active again. To set this up, add an entry to the ISDN Autocall table of the Marlin Bridge for an IP address (specific host destination), an IP subnet (group of hosts), or an inverse subnet (i.e. any host which is not in the local subnet).

  • Page 58: Scanet Osi Name Service Autocalls

    IPX-WS (Workstation) with the MAC workstation address. Repeat for each workstation. The Marlin Bridge can be set up to respond to “get nearest server” requests from a client workstation in place of a remote ISDN connected server (put a “!” in front of appropriate IPX-SAP entry see Chapter 4).

  • Page 59: Banyan Autocalls

    Create an ISDN Autocall table entry of type “ScaNet” for each named service supported at the remote LAN accesssed using the ISDN network. These table entries are made at the Marlin Bridge local to the stations requesting the service. Banyan Autocalls For networks running Banyan Vines, the Marlin Bridge can be set up to “learn”...
  • Page 60 Nautica Marlin Bridge Reference Guide 2-26 302976-A Rev.00...

  • Page 61: Manager Operation

    This section describes the management system and how to access and use it. The purpose of this section is to make the user familiar with the management concepts which are common to all Nautica Bridge products, not to describe the management facilities of the product to which this manual refers.

  • Page 62: Introduction

    Nautica Marlin Bridge Reference Guide Introduction Access to the management system is available from: • The front panel . • A terminal attached to the local manager port. • A remote network attached terminal. • A management station that conforms to SNMP (MIB II) standards.

  • Page 63: Menus And Forms

    A good example of such a list is the compression options which the Marlin Bridge can support, where DISABLED, ENABLED and FAST are allowed, but SLOW is not! How the menus and forms are selected and displayed depends on whether the front panel or a terminal is being used.

  • Page 64: Front Panel Operation

    MENU NAVIGATION VIA THE FRONT PANEL Normally the front panel “window” shows the Marlin Bridge’s interface loading bar graph, which gives a quick indication of the loading on external interfaces. If more information is needed, or to change a parameter, then move the window down the menu tree to the form containing the information.

  • Page 65: Form Display And Editing Via The Front Panel

    Form Display and Editing Via the Front Panel A form consists of a number of fields or items of information. Some fields are fixed or generated by the Marlin Bridge and canot be changed by the user, while others may be set manually.

  • Page 66: Saving Changes Via The Front Panel

    Use the ENTER key to move the cursor from one character to the next in the field. At the end of the field, the Marlin Bridge asks: “Is this Correct?”. If so, hit the ENTER key.

  • Page 67: Interface Activity Bar Graph Operation

    Interface Activity Bar Graph Operation Normally the front panel shows the interface activity bar graph. The display shows each interface (LAN1, WAN1, etc.) for two seconds, as in Figure 3-4. The bar graph shows the level of Transmit (T) and Receive (R) activity.

  • Page 68: Screen Description

    Nautica Marlin Bridge Reference Guide Screen Description Figure 3-5 Product Name & Version Commands & Responses Figure 3-5. Terminal Management Screen Regions Title Line Region The product name, version number and screen title appear in a bar at the top of the screen. The product name and version number are different for each type of product.

  • Page 69: Menu Navigation Region

    Manager Operation Form Name: Choosing this item asks the management system to display the named form and the information it contains. Each item has a short description of its function. Command Name: A command that causes a management action to be taken, depending on which command was entered, the state of the unit and the current unit configuration List Item: If there is more than one item of the same type, e.g.

  • Page 70: Menu Navigation

    Nautica Marlin Bridge Reference Guide Menu Navigation Figure 3-6 item name on the command line (where the cursor is positioned already, waiting for input), then press the <ENTER> or <RETURN> key, e.g. for COnfiguration: CO<RETURN> N.MAR.mmm SYSTEM NAME Enter command: Figure 3-6.
  • Page 71 This is called command type-ahead. It allows experienced users to move around the menu system quickly without using certain menus. N.MAR.mmm SYSTEM NAME Name Type LAN1 LAN Port No. 1 Ethernet [WAN1 HDLC Link 1 Bridge HDLC X.21 ISDN1 TA Link 1 Bridge TA ISDN2 TA Link 2 Bridge TA...

  • Page 72: Form Navigation And Editing

    Nautica Marlin Bridge Reference Guide This does the same as moving the cursor to line WAN1 using the cursor keys. Whatever method is used, the management system in this example displays a form showing the selected port’s configuration, which can then be edited.
  • Page 73 When system information is changed, it must be saved in the Marlin Bridge’s semi-permanent memory if it is to be used when a system restart is done e.g. after a power failure. When changes are made, this message appears: “Please save new configuration (SAVE)”...

  • Page 74: Remote Terminal Management

    The remote devices list is built automatically by the local Marlin Bridge, and displayed by typing REM<RETURN> to show a list like that in needed, except to add the names and IP addresses of the Marlin Bridges on the network. N.MAR.mmm SYSTEM NAME Remote Units...

  • Page 75: Disconnecting From The Management System

    IP address and TCP port on the command line e.g. 1.2.3.4 23<RETURN> When familiar with the names of the Marlin Bridges in the network, these can be connected using commands anywhere int he menu tree (not only from the Remote Units screen) by typing “REM”...

  • Page 76: Snmp Management

    Nautica Marlin Bridge Reference Guide Note: it is also possible to disconnect from the remote unit with <CTRL>+D. This makes TCP/IP Telnet (and not the Marlin Bridge) abort the connection, so it should be used only when QUIT does not work.

  • Page 77: Control Characters In Text Strings

    Control Characters In Text Strings To enter control characters into text string fields, each one must start with the ^ (caret) character. The two-character combination (of caret and alphabetic character) is translated into one control character by the management system. The management system only allows control characters in text strings in certain cases, e.g.
  • Page 78 Nautica Marlin Bridge Reference Guide Control Char 3-18 Action In Menu None Go to the top level menu None None Go to previous screen Typed command line text will be submitted for processing In a multi-page form, moves to the next page. If...
  • Page 79 Control Char 302976-A Rev.00 Action In Menu Repaint the screen. Refreshes the screen if terminal is used for switching (hot-keying) between this and other systems Display on-line help window. If multi-page help is available, then repeating command will show successive pages. Manager Operation Action In Form Same as menu action...

  • Page 81: Reference

    The management options available via the Marlin Bridge’s front panel are not as comprehensive as those via a terminal interface. They do, however, enable the Merlin Bridge to be configured such that it can become operational. This chapter includes the management of the Basic Rate ISDN Option Cards which may not always be present.

  • Page 82: Main Menu

    Nautica Marlin Bridge Reference Guide Main Menu N.MAR.mmm SYSTEM NAME Enter command: Figure 4-1. Main Menu Screen CONF: Provides access to the configuration facilities within the management system STATS: Gives access to the status and statistical informaion maintained by the unit.

  • Page 83: Configuration

    Configuration N.MAR.mmm SYSTEM NAME (co) Enter command: Figure 4-2. Configuration Menu Screen STD: Resets the Marlin Bridge’s current configuration back to the default factory settings. SYSTEM: all product variants: manager password, date, time, etc. PORTS: parameters. BRIDGE: features. ISDN: features SNMP: parameters.

  • Page 84: System Management

    Nautica Marlin Bridge Reference Guide System Management N.MAR.mmm SYSTEM NAME Date (dd/mm/yyy) : 13/08/1998 Time (hh:mm:ss) : 15:49:23 Day of the Week : Thursday Old Password : PASSWORD New Password ReType Password Idle Timeout (sec) : 900 LCD Manager Lock : Disabled ^E - Submit Figure 4-3.
  • Page 85 REFERENCE IDLE TIMEOUT: After this time (in seconds), if there has been no input from the manager terminal, the manager session will be closed. LCD MANAGER LOCK: If the LCD manager is locked, it is impossible to change the IP address, Name, Date/Time or make ISDN calls from the front panel.

  • Page 86: Port Management

    Nautica Marlin Bridge Reference Guide TIME SINCE REBOOT: This is the time in hours:mins:secs since the Marlin Bridge was last rebooted. Port Management N.MAR.mmm SYSTEM NAME Name Type LAN1 LAN Port No. 1 Ethernet [WAN1 HDLC Link 1 Bridge HDLC X.21...
  • Page 87 REFERENCE Note: The commands available depend upon the port (type) selected. If a PRI TA is installed in the unit, it will be automatically detected and the appropriate number of ports supported by the TA will be displayed in addition to any other ports on the unit. The number of ports is dependant on the quantity of channels for which the PRI TA has been keyed, in addition, not all of the keyed ports may have been activated.
  • Page 88 ISDN port on the calling bridge to NONE so that it will not answer its own call. PHYS.: The physical layer type for the port. The Marlin Bridge supports IEEE 802.3 CSMA/CD in the case of the Ethernet port, and X.21 in the case of the WAN port.

  • Page 89: Lan Ports

    LAN Ports N.MAR.mmm SYSTEM NAME Port Number Port Name STP Priority Line Speed (Bits/s) : 10000000 ^E - Submit Figure 4-5. LAN Port Configuration Form Port Number: The port number in the system. It is generated automatically by the system and cannot be configured. Port Name: A name given to the port for ease of reference.

  • Page 90: Hdlc Ports

    LINE SPEED (bits/s): This parameter should be set to the actual line speed that the interface is being clocked at. Although the Marlin Bridge does not generate clocks (other than a fixed 19.2 Kbps V.24 clock) this parameter is used to configure internal timers which optimise use of the link.
  • Page 91 REFERENCE DISABLED turns data compression off. ENABLED allows the system to use its standard bandwidth optimisation algorithm for compression. This should be used on all links up to 256Kbps. FAST should be used on links with speeds greater than 256 Kbps to maintain maximum throughput on the line.
  • Page 92 Nautica Marlin Bridge Reference Guide NON-EXP+BKUP means that when Demand Threshold values are met (see below), packets defined as NON-expedited in the Type Filter Table will be sent by the first additional link dialled up. It also allows the use of BACKUP facility to dial the Remote Unit Name destination (see below) if the usual link fails.
  • Page 93 REFERENCE DEMAND PERIOD: The period (in seconds) over which bandwidth utilisation is measurd to determine whether the Demand Threshold has been exceeded. Over the Demand Period, more than Demand Threshold percent of the link bandwidth must have been used before additional bandwidth (if available) will be dialled up.
  • Page 94 Nautica Marlin Bridge Reference Guide The original port may have requested the backup circuit for backup or for additional bandwidth. Therefore, it is possible to establish a priority heirarchy for ports which may be using backup circuits for either reason. The higher the number, the higher the priority.

  • Page 95: Ppp Ports

    PPP Ports N.MAR.mmm SYSTEM NAME Edit PPP Port Port Number Port Name STP Priority Line Speed (bits/s) ^E - Submit Figure 4-7. PPP Port Configuration Form Please refer to the HDLC Ports screen and parameter descriptions above for details. PPP should be used on high speed links where the simplicity of the protocol, particularly the fact that acknowledgements are not required, enables higher data throughput to be achieved than by using HDLC.

  • Page 96: Ta Ports

    Nautica Marlin Bridge Reference Guide TA Ports N.MAR.mmm SYSTEM NAME Edit TA Port Port Number Port Name STP Priority Line Speed (bits/s) Compression Dial Timeout ATZ String SPID Local Number ^E - Submit Figure 4-8. TA Port Configuration Form Note: parameters SPID, LOCAL NUMBER and SWITCH TYPE (described below) are not displayed and have not effect.
  • Page 97 REFERENCE LINE SPEED: This parameter should be set to the actual line speed that the interface is being clocked at. ISDN calls are generally established at 64000 bits/s per channel, but some services in North America can only support 56000 bits/s. COMPRESSION: Data compression can increase the effecive bandwidth of the port typically between 2 and 8 times.
  • Page 98 Nautica Marlin Bridge Reference Guide Multicast and Broadcast frames are not included in loading calculations, so additional bandwidth will not be dialled up due to these frame types. DEMAND PERIOD: The period (in seconds) over which bandwidth utilisation is measured to determine whether the Demand Thrshold has been exceeded.
  • Page 99 Marlin Bridge) or external. The control of both types of TA is identical, so any external TA must be of a suitable type for control by the Marlin Bridge. The requirements for an external TA are: 302976-A Rev.00...
  • Page 100 • The TA should not automaticlaly answer incoming calls, but should send a RING message to the Marlin Bridge. The Marlin Bridge will answer the call only if it is appropriate, by sending the “Answer String” (ATA). 4-20 302976-A Rev.00...

  • Page 101: Bridge Configuration

    BRIDGE CONFIGURATION N.MAR.mmm SYSTEM NAME ADDRESS - Address Filter Table PARAM (co br) Enter command: STP: (page parameters. ADDRESS: access filter table commands. TYPE: PARAM: ARP: SAP: (page 302976-A Rev.00 Bridge Configuration STP - Spanning Tree Configuration TYPE - Type Filter Table - Filtering Parameters ARP - Static ARP Table SAP - Static SAP Table...

  • Page 102: Spanning Tree Management

    Nautica Marlin Bridge Reference Guide Spanning Tree Management The spanning Tree Algorithm (STA) and associated Spanning Tree Protocol (STP) must be enabled on a bridge network where loops could be created. STA resolves the network topology to ensure that where physical loops exist, then certain links are disabled to create a single path through the network.

  • Page 103: Address Filter Table

    Address Filter Table The Address Filter Table is at the core of the Marlin Bridge functions.It is the primary mechanism for accepting or rejecting packets to be routed through the bridge.
  • Page 104 Nautica Marlin Bridge Reference Guide The Marlin Bridge itself generates frames when operating normally. Such frames are used as part of its process of communication with other bridges on the network. These frames appear in the filter table, but can be ignored.
  • Page 105 REFERENCE DESTINATION: The destination MAC address or, if the Marlin Bridge has determined that the destination is another Nautica series Bridge, it will display the destination’s name. Any frame received will have its destination address compared with this field in the Address Filter Table. The action taken when a match is or is not found is determined by the Action on Match parameter - see Filter Table Parameters below.
  • Page 106 Nautica Marlin Bridge Reference Guide The keyboard cursor keys move the screen cursor bar up and down the entries in the table. When the top or bottom of the current page is reached and there are more entries to display, the screen will display the previous or next page respectively.

  • Page 107: Add Filter Table Entry

    If no parameters are given with the command, the entry under the cursor will be deleted from the table (but only if it is a Learned entry). A parameter can select the addressess to be flushed: FLU 1234* flushes all adddresses beginning with 1234. FLU* deletes all Learned entries from the table.

  • Page 108: Type Filters

    Nautica Marlin Bridge Reference Guide DESTINATION: Destination MAC addrress. The Nautica series Bridge unit name can be used instead. SOURCE: Source MAC address. The Nautic series Bridge unit name can be used instead. If Learn source On Multicast is enabled, the filter table works with Destination addresses only and source is left blank.
  • Page 109 See tables below for lists of common types. ACTION ON MATCH: Action on match is performed only when type Matching is ENABLEd in the Filter parameters form. Options are REJECT (default), FORWARD or EXPEDITE. Table 4-1. Type (Hex) 0800 0806 0807 0888-088A 0A00...
  • Page 110 Nautica Marlin Bridge Reference Guide Table 4-2. Type (Hex) 4-30 Common IEEE Types Description IEEE 802.2 SNAP Banyan Vines Novell IPX 802.2 ISO DIS 8473 Global DSAP broadcast 302976-A Rev.00...

  • Page 111: Filter Table General Parameters

    Filter Table General Parameters N.MAR.mmm SYSTEM NAME Ageing Time Learning Action On Match Filter Multicast Type Matching Unmatched Type Action : Forward Learn Src on Multicast Learn Novell 802.3 Learn Novell Ethernet Learn Novell 802.2 Learn Banyan Strip Novell RIP/SAP PC Anywhere over IPX MS WINS Server ^E - Submit...
  • Page 112 Nautica Marlin Bridge Reference Guide With Learning DISABLEd, the bridge does not add entries to the filter table: only frames from sources already in the table are passed for forwarding. All others are rejected. ACTION ON MATCH: Specifies if frames that match Permanent entries in the Address Filter table are FORWARDed to the ongoing port or REJECTed.
  • Page 113 REFERENCE REJECT means that if a received packet type is not found in the Type Filter table, the packet is REJECTed. LEARN SRC ON MULTICAST: Specifies whether the bridge will “learn” the source address of a device if it transmits a Broadcast or Multicast packet.

  • Page 114: Static Arp

    Nautica Marlin Bridge Reference Guide However, if this is ENABLEd, the bridge will always spoof the remote network. No Novell RIP or SAP broadcasts are transmitted over the ISDN links. PC Anywhere over IPX: If pcANYWHERE over IPX across the...

  • Page 115: Sap Filters

    To either ADD or EDIT an entry, enter the IP Address and MAC Address in the form. IP Address: Responses to ARP requests from this host IP address will be sent. MAC Address: The MAC address associated with the IP address. SAP Filters The SAP filter list is obtained by typing CO BR SAP from the command line prompt.
  • Page 116 Nautica Marlin Bridge Reference Guide Large Novell IPX networks can contain many servers and services which are continually advertised via the Service Advertising Protocol (SAP). IPX routing information is also advertised, via the Routing Information Protocol (RIP). When any of the ‘Learn Novell’ options are enabled in the CO BR PAR screen, the received SAPs and RIPs are examined and automatically converted into Autocall entries.

  • Page 117: Isdn Configuration

    (co isdn) Enter command: Figure 4-14. ISDN Configuration Screen AUTHORISE: Authorise Remote Bridges to connect to this Marlin Bridge. AUTOCALL: Address to ISDN Numbers for ISDN calls automatically based on traffic content. useful for links with no permanent connection. BANDS: Set up and edit ISDN time bands. For allowing or blocking ISDN calls based on time of day.
  • Page 118 ISDN numbers authorised to dial into this Marlin Bridge. Your PTT supplier can provide the ISDN number of the calling unit, which the Marlin Bridge uses to enable ro disable access. WINS: Show, edit, add or delete entries in the list of MS-Windows servers on the network supporting the TCP-32 protocol.

  • Page 119: Bridge Authorisation

    To prevent this, it is possible to set up a list of bridges which are authorised to connect to the network. When this list contains at least one entry, the Marlin Bridge will only interwork with the bridges whose Ethernet addresses appear in the list.

  • Page 120: Isdn Automatic Call Addresses

    ISDN Automatic Call Numbers (autocalls) is a feature for making and controlling ISDN-only connections between Ethernet LANs. The Marlin Bridge can interpret various protocols to determine when it can set up ISDN connections, or clear them down and “spoof” (imitate) the devices using the protocols, to minimise ISDN call costs.
  • Page 121 REFERENCE By initially setting up a manual ISDN call between a remote site and the central site, the Nautica series Bridges can learn the locations of the servers and routers on the network. After the manual connection is cleared, the Nautica series Bridges act as Novell server or router “agents”...
  • Page 122 MAC address of the workstation. Repeat this for each workstation. ScaNet OSI Name Service Support The Marlin Bridge supports the ScaNet product range OSI Name Service porotocol requests in a similar manner to Novell IPX support. OSI names and associated ISDN numbers of remote Marlin Bridges where those “names”...
  • Page 123 Make a manual call to each remote bridge in turn. Let each call continue for at least 5 minutes. The Marlin Bridge should learn the topology of the Banyan network in this time, since Routers and Servers broadcast every 2 minutes. When this is done, SAVE the Autocall information.
  • Page 124 Nautica Marlin Bridge Reference Guide N.MAR.mmm SYSTEM NAME Edit ISDN Autocall Address Type Address Remote Unit Name : Bumpable Idle (secs) Idle Threshold IPX Service Type IPX Network Type ^E - Submit Figure 4-17. Add/Edit Entry to Autocall Table TYPE: This specifies the type of entry.
  • Page 125 REFERENCE ScaNet OSI Name Service: Indicates that a named service (see “Address” below) is available on the remote server accessed via an ISDN connection (see “Remote unit name” below). Banyan Vines: Types are BANYANDEF (default Banyan destination), BANYAN (Banyan server/router), BANYAN_WS or STREETTALK.
  • Page 126 Nautica Marlin Bridge Reference Guide where: ! (IPX_SAP): This prefix must be added manually to the entry (once it has been learnt) if the bridge is to respond to “get nearest server” requests from local workstations. This is normally used in situations where there is no server on the network connected to the LAN port.
  • Page 127 REFERENCE Typically, an automatically learned Novell server will consist of three autocall entries: an IPX_SAP for the service details, an IPX_RIP for connecting to the service, and an IPX_RIP with the address prefixed with a ! for controlling the autocall and spoofing. For example, a file server called Main_Server could create the following entries;...
  • Page 128 Nautica Marlin Bridge Reference Guide ScaNet Name of an OSI service available over an ISDN-only connection. BANYAN These addresses are generated automatically and should not be edited. REMOTE UNIT NAME: Destination bridge name as defined in the “COnf ISDN NUMbers” table. The names must match exactly the names configured in the remote bridges themselves.
  • Page 129 REFERENCE 0004 - file server 0278 - directory server (Netware Directory Services) 0047 - advertising print server IPX NETWORK TYPE: Applies only to IPX autocalls. Options are 802.3, 802.2 or ETH2 (Ethernet 2). To set up or view an IPX 802.2 type Autocall table, ask to view only 802.2 entries by entering “VIEW 802.2”.

  • Page 130: Isdn Time Bands

    Nautica Marlin Bridge Reference Guide ISDN Time Bands ISDN Time Bands define the types of ISDN calls allowed at given times. For example, extra bandwidth may be required during peak working hours, but at other times Demand Bandwidth should be disallowed.

  • Page 131: Isdn Tokens

    Autocall table entries are allowed during this band. ISDN Tokens The Marlin Bridge can be set up to limit the length of time it can have ISDN calls (active), based on a “coin-in-the-slot” principle. The administrator adds “tokens”: each token is worth one second of ISDN call time.

  • Page 132: Isdn Numbers And Manual Calls

    ISDN Numbers and Manual Calls The ISDN Numbers table is used to link the name of a remote Marlin Bridge with the ISDN number needed to reach it. The name can then be used by the Marlin Bridge itself to auto-configure certain information (see, for example, Novell IPX Autocalls).

  • Page 133: Figure 4-20. Add/Edit Isdn Numbers Screen

    Last Test Day/Mo 13/02 Figure 4-20. Add/Edit ISDN Numbers Screen NAME: The name of the Marlin Bridge which can be dialled up over ISDN using the associated number. The names must match exactly the names configured in the remote Marlin Bridges themselves.
  • Page 134 Nautica Marlin Bridge Reference Guide If the test of the number fails, the Marlin Bridge will make a warning sound, and will display the fault on all manager screens. The fault can be cleared by typing ACK in the manager, or by pressing the ENTER key on the front panel when the warning sound is heard.

  • Page 135: Calling Line Identification

    CLI table, the CLI is enabled automatically. Note: in the CLI information presented to the Marlin Bridge by your PTT, the area code is usually added before the number, even if the call is a local one.

  • Page 136: Tcp-32 Wins

    Nautica Marlin Bridge Reference Guide TCP-32 WINS The TCP-32 WINS Name table is a learned or manually entered list of names and IP Addresses of Windows NT servers or Windows for Workgroups Pcs. Names on the local subnet can be learned, whereas remote names must be entered manually.
  • Page 137 N.MAR.mmm SYSTEM NAME TCP-32 WINS Configuration Name : Sleepy Description : Sales Server IP Address : 192.0.2.11 Group Address : Specific Entry Type : Static NAME: Name of the resource (server or workstation). A name must be unique within a domain. DESCRIPTION: Description of the resource, for information only.

  • Page 138: Ta List

    Nautica Marlin Bridge Reference Guide TA List The TA list is obtained by typing CO IS TA at the command line prompt. N.MAR.mmm SYSTEM NAME Installed TA List Card Slot Type Base 1 Unknown Exp1 1 PRIETSI EDIT - Edit Entry...

  • Page 139: Etsi Primary Rate Ta

    ETSI Primary Rate TA EDITing an ETSI PRI TA from the TA list will display the following form. N.MAR.mmm SYSTEM NAME ETSI Primary Rate TA ATVER? : Version x MGR=n.nn ATMODE? : nn ETS nn ATTYPE? : PRI E1 ETSI Keyed Chans : nn Active Chans...
  • Page 140 Nautica Marlin Bridge Reference Guide ATMODE?: This field show sthe number of enabled channels, the operating mode of the TA and the number of keyed channels are shown. e.g. 6 ETS 30 indicates that 6 channels have been activated on a ETSI PRI TA which is keyed to support 30 channels.

  • Page 141: Usa Primary Rate Ta

    USA Primary Rate TA EDITing a USA PRI TA from the TA list will display the following form. N.MAR.mmm SYSTEM NAME USA Primary Rate TA ATVER? : Version x MGR=n.nn ATMODE? : nn NI2 nn ATTYPE? : PRI T1 USA Keyed Chans : nn Active Chans...
  • Page 142 SWITCH TYPE: This field should be configured to match the PRI switch type used by teh ISDN service provider. Options are: Nat.ISDN, AT&T Custom, AT&T and Nortel DMS. For more information please refer to the ORDERING PRIMARY RATE ISDN booklet which is included with North American PRI TA shipments.

  • Page 143: Snmp Management

    If you intend to make use of SNMP to manage the Marlin Bridge, you need to ensure that the management station you are using has the appropriate MIBs (Management Information Base) installed.
  • Page 144 Nautica Marlin Bridge Reference Guide VERSION: Unit version number, generated automatically by the system for information only. It cannot be configured manually. DESCRIPTION: Unit description, generated automatically by the system. It cannot be configured manually. NAME: Unit name, used for reference purposes. This name appears in the screen title region, and can be changed via the SYSTEM configuration screen.
  • Page 145 REFERENCE Set this address to 0.0.0.0 to disable TRAP generation. REMOTE TRAP PORT: Specifies the UDP (User Datagram protocol) port which will receive any TRAPs issued by the unit. TCP/IP’s UDP is used to encapsulate SNMP GETs, SETs and TRAPs. 302976-A Rev.00 4-65...

  • Page 146: Status And Statistics Monitor

    Nautica Marlin Bridge Reference Guide Status and Statistics Monitor The Marlin Bridge provides a wide range of status and statistical informaation, used both to analyse unit and network performance and to diagnose faults. These statistics are accessed via the main screen shown below.

  • Page 147: Ports Statistics

    Ports Statistics All interfaces (physical or logical, serial or parallel, LAN or WAN) on the Marlin Bridge are known as ports. This screen shows an overview of the ports present on the unit, their utilisation and current state. More status and statistical information is available by selecting the port with the help of the cursor keys, then entering the EXAMine command.

  • Page 148: Ethernet Port Statistics

    Nautica Marlin Bridge Reference Guide Ethernet Port Statistics N.MAR.mmm SYSTEM NAME Ethernet Address : 002062xxxxxx Total Tx Octets Total Tx Packets Total Tx Multicasts Total Tx Broadcasts :0 Total Tx Errors Total Rx Octets Total Rx Packets Total Rx Multicasts...
  • Page 149 The statistics on the right of the screen give a detailed list of errors by error type. Low error counts are to be expected, but if the error counts are higher than usual, this could indicate a problem with the LAN segment to which the Marlin Bridge is connected. 302976-A Rev.00...

  • Page 150: Serial Interface Statistics

    Nautica Marlin Bridge Reference Guide Serial Interface Statistics N.MAR.mmm SYSTEM NAME Port Number Total Tx Octets Total Tx Packets Total Tx Errors Transmit Signals : CTL Total Rx Octets Total Rx Packets Total Rx Errors Rx Signals : IND (stat port exam) Enter Command: Figure 4-29.

  • Page 151: Bridge Statistics

    The statistics on the right of the screen give a detailed list of errors by error type. Low error counts are to be expected, but if the error counts are higher than usual, this could indicate a problem with the LAN segment to which the Marlin Bridge is connected. Bridge Statistics N.MAR.mmm SYSTEM NAME...

  • Page 152: Link Spanning Tree Status

    InDiscard: Number of frames received from the link but rejected during address filter table processing. Name: Name of the link. Link Spanning Tree Status N.MAR.mmm SYSTEM NAME Link Spanning Tree Stats Link No Prioroity State : Forwarding Designated Bridge Enabled : Enabled Path Cost : 15625...

  • Page 153: Spanning Tree Statistics

    Designated Root: MAC address of the bridge acting as the root bridge in the network. Designated Cost: Total cost of the path to the root bridge. Designated Bridge: Bridge on the local network which handles the Designated Link (see below). Designated Link: Link used to forwad frames to the root bridge from the local network.
  • Page 154 Nautica Marlin Bridge Reference Guide Time Since Topology Change: Time (in seconds) since the bridge took part in a change in the network topology. Topology Change Count: The number of topology changes since the last time the bridge was reset.

  • Page 155: Isdn Call Statistics

    ISDN Call Statistics The Marlin Bridge holds status and statistical information about ISDN calls. Information on previous calls is explained in the ISDN Call History section. Current ISDN connections are shown on the screen below. Current calls can be cancelled by selecting the required item and typing CANCEL.

  • Page 156: Isdn Call History

    Nautica Marlin Bridge Reference Guide Bk: Yes: call made for backup or bandwidth on demand request. Bu: Yes: current call can be bumped. ISDN Call History N.MAR.mmm SYSTEM NAME ISDN Call History Destination Total Time 0711231234 00:12:32 0923710277 00:01:12 CLEAR - Clear Totals DEL - Delete Record...

  • Page 157: Hublet Statistics

    Hublet Statistics If a Hublet repeater expansion card is fitted into the expansion slot of the Marlin Bridge, then this screen displays the status of the repeater ports. N.MAR.mmm SYSTEM NAME Hublet Ports Port Last User Rx Frames Rx Octets Coll FCSE Link Polarity Partitioned...

  • Page 158: Tcp/Ip Statistics

    TCP/IP Statistics This menu option provides some basic SNMP MIB-II information about the TCP-IP operation of the Marlin Bridge. TCP/IP is mainly used with Telnet, so the Marlin Bridge can be remotely managed. N.MAR.mmm SYSTEM NAME (st tcp) Enter command: Figure 4-36.

  • Page 159: Connect To Remote Devices

    Bridge then its name, IP address and MAC address appear in a list from which it can be selected and connected to. This list is built up automatically by all Marlin Bridges on the network and does not require any configuration by the user, so it provides a very fast and convenient way to connect to and manage other units on the network.
  • Page 160 Nautica Marlin Bridge Reference Guide MAC Address: MAC Address of the remote Marlin Bridge. Relevant Commands REM: There are various ways to select a remote Marlin Bridge: 1. REM<name><RETURN> 2. REM <IP Addr (port)><RETURN> 3. REM<return> (with remote unit highlighted using the cursor...

  • Page 161: Isdn Clearing Codes

    This chapter provides a description of the command line utilities and procedures, as well as a faultfinding guide to various Marlin Bridge problems. This chapter includes the following sections: • Configuration Default • Unit Reboot • Configuration Dump • Configuration Load •...

  • Page 162: Configuration Default

    Nautica Marlin Bridge Reference Guide Configuration Default The current SAVEd configuration can be defaulted by typing CO STD from any menu. You will be prompted to confirm the action: Y will cause the unit to erase the SAVEd configuration, and reboot with the default configuration.

  • Page 163: Configuration Load

    Configuration Load Provided that the stored configuration file is compatible, it may be loaded back into this or another unit. Type LCONFIG from the menu and when prompted, send the file to the unit as an ASCII file transfer. When the configuration file has been loaded into EPROM successfully, the unit will reboot itself automatically with the new configuration.
  • Page 164 (0, 14, 22570008) ISDN_PORT: ISDN2 DISC Reason 17 Figure 5-1. Trace Window Screen (Example) In the above example, the Marlin Bridge tries to make an ISDN call to number 123456, but the call fails due to reason 17 (User Busy).

  • Page 165: Isdn Clearing Codes

    Ony one Manager can have the Trace window open at any one time. Note: the Trace Window is not still active. This is especially important for a remotely accessed Trace Window, as the bridge will attempt to forward the Trace Window packets to the unit from which it was originally accessed.

  • Page 166: Faultfinding Ipx Networks

    Nautica Marlin Bridge Reference Guide The next step would be to check that other devices on the local network can be pinged, to make sure that the terminal device is functioning correctly. To check if the bridge has received any packets from the terminal device, the ARP list can be viewed by typing STAT TCP ARP.

  • Page 167: Faultfinding Basic Rate Isdn

    ISDN Port Status screen by typing STAT ISDN.Then type CALL [number] where [number] is the ISDN phone number of the Marlin’s ISDN line that you are trying to test. If you have given a different local number to each ‘B’ channel, use the one you configured under ISDN2 (if you use the one configured under ISDN1, you will get a busy signal, clearing code 17).
  • Page 168 Nautica Marlin Bridge Reference Guide If all is working well, the ISDN Port Status screen will show both the outgoing and incoming calls made from and to the unit. If there is a problem, the error code sent by the network or generated internally will be displayed against ISDN1.

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