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Cabletron Systems TRRMIM-2AT User Manual

Other manuals for TRRMIM-2AT: Installation Manual
Manual is about: Token Ring Port Switching Media Interface Modules

Summary of TRRMIM-2AT

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    Cabletron systems, p. O. Box 5005 rochester, nh 03866-5005 the complete networking solution ™ trxmim tm user’s guide models 22a, 24a, 42a, 44a.

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    Notice i notice cabletron systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult cabletron systems to determine whether any such changes have been made. The hardware, firmware, or soft...

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    Fcc notice ii fcc notice this device complies with part 15 of the fcc rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation....

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    Cabletron systems, inc. Program license agreement iii cabletron systems, inc. Program license agreement important: before utilizing this product, carefully read this license agreement. This document is an agreement between you, the end user, and cabletron systems, inc. (“cabletron”) that sets forth ...

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    Exclusion of warranty and disclaimer of liability iv exclusion of warranty and disclaimer of liability 1. Exclusion of warranty. Except as may be specifically provided by cabletron in writing, cabletron makes no warranty, expressed or implied, concerning the program (including its documentation and ...

  • Page 6: Contents

    Contents v contents chapter 1 introduction 1.1 using this manual . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 about the trxmim family . . . . . . . . . . . . . . . . . . 1-2 1.2.1 tcu ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1.2.2 port assignments and ...

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    Contents vi 2.4.3 ring speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2.4.4 ring sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2.4.5 lanview leds . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2.5 other specifications . . . . . . . . . . . . . . ...

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    Contents vii appendix a introduction to four-ring fnb functionality a.1 introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 a.2 the flexible network bus (fnb). . . . . . . . . . . . . . . . . . . A-1 a.3 fnb operations without port switching . . . . . . . . . . . ...

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    Page 1-1 chapter 1 introduction welcome to the token ring port switching media interface modules user’s guide . This manual serves as a reference for the installation and troubleshooting of cabletron systems modules trxmim-22a™, trxmim-24a™, trxmim-42a™, and trxmim-44a™. The trxmim models -22a / -24...

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    Using this manual page 1-2 1.1 using this manual prior to installing and operating the trxmim, please read through this manual completely to become familiar with its contents and with the features of the trxmim. If you are not familiar with port switching and four-ring fnb applications, please begin...

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    Tcu ports page 1-3 • support for cabletron systems’ automatic beacon recovery process (abrp), • automatic speed fault protection, • active filtering, re-timing, and repeating circuitry on all ports, • multiple ring out connectivity for passive mau workgroups, • and lanview leds for “at-a-glance” dia...

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    About the trxmim family page 1-4 unit) workgroups. See section 1.2.4, support for passive mau workgroups . A c t i v e c i r c u i t r y on each tcu port, trxmims provide active circuitry which filters, equalizes, and amplifies all received signals before transmitting them to the next point on the r...

  • Page 13

    Port assignments and port switching page 1-5 port-switching trxmim, cabletron systems offers alternative solutions. Figure 1-2. Fnb ring 1 segmented to form two lans w i t h p o r t s w i t c h i n g when controlled by a management module which supports port switching, trxmims and other port switchi...

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    About the trxmim family page 1-6 stations from ring to ring. To move a station from one ring to another, a user simply accesses the local management application and issues a new port assignment. The trxmim then switches the tcu’s port-to-ring connection internally, as illustrated in figure 1-4, inst...

  • Page 15

    Automatic configuration at power-up page 1-7 1 . 2 . 3 a u t o m a t i c c o n f i g u r a t i o n a t p o w e r - u p the management module in the trxmim’s host mmac stores all user-configured port assignments in its nvram. Upon hub start-up or trxmim reset, the management module reissues its store...

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    About the trxmim family page 1-8 1 . 2 . 4 s u p p o r t f o r p a s s i v e m a u w o r k g r o u p s whereas a station signals a tcu to open its interface by sending a phantom current down its lobe cable, a passive mau can not provide phantom current. A tcu ring out port is therefore configured to...

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    Support for passive mau workgroups page 1-9 figure 1-5. Improved beacon recovery resolution for maus (8 stations) (8 stations) (8 stations) (8 stations) trxmim ring out ring out ring out ring out multi-station access units ring in ring in ring in ring in when each mau is individually connected to th...

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    About the trxmim family page 1-10 n o c o n n e c t i o n r e d u n d a n c y the trxmim mau configuration does not provide for the mau’s redundant connection to the ring. In the common configuration, a mau chain is dual-attached to the token ring lan via both a ring out cable and a ring in cable. U...

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    Lanview leds page 1-11 thus fnb rings 2, 3, and 4 are extended across the mmac as far as there are port switching modules to carry them. Port switching mims are also compatible with earlier single-ring mims (e.G. Trmim) and will interconnect across fnb ring 1, but not across fnb rings 2, 3, or 4. (s...

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    Further information page 1-12 1.3 further information 1 . 3 . 1 r e l a t e d m a n u a l s the manuals listed below should be used to supplement the procedures and other technical data provided in this manual. The procedures in them will be referenced, where appropriate, but will not be repeated. C...

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    Getting help page 1-13 by compuserve ® : go ctron from any ! Prompt by internet mail: support@ctron.Com by fax: (603) 337-3075 by bbs: (603) 337-3750 by mail: cabletron systems, inc. P.O. Box 5005 rochester, nh 03866-5005.

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    Page 2-1 chapter 2 installation requirements & specifications of operation before attempting to install the trxmim, please review the recommendations, requirements, and specifications which are outlined in this chapter. Failure to follow these guidelines could result in poor network performance. 2.1...

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    General cabling considerations page 2-2 page 5) utp cables also meet these requirements. However, signal integrity relies not only upon the quality of the cable but also upon the quality of the connections. The connectors or terminators used add considerable losses and may drive signal attenuation b...

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    Maximum number of stations page 2-3 • token ring signals should not be routed through utp cables that exit a building or which are adjacent to cables either exiting a building or exposed to lightning strikes and power surges. • utp cables that contain token ring signals should not be simultaneously ...

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    Utp cabling specifications page 2-4 2.2.1 utp cable categories both utp concentrator modules (trxmim-22a / 24a) support utp cables classified as category 3, 4, and 5. Utp cable is categorized according to the following specifications. Category 3 consists of (usually) four unshielded twisted pairs of...

  • Page 26

    Utp cable lengths to stations page 2-5 warning: because near-end crosstalk (next) contributes the majority of its detrimental effects near the end of a lobe cable, the quality of jumper cables and patch cables is most critical. Seek the highest practical grade. The quality of connectors and terminat...

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    Stp cabling specifications page 2-6 recommended maximum lobe length should be reduced to keep crosstalk interference within acceptable levels when using category 3 cable. 2.3 stp cabling specifications both stp concentrator modules (trxmim-42a / 44a) support all stp cables classified as ibm types 1,...

  • Page 28

    Stp cable lengths to stations page 2-7 ibm type 6 consists of two stp of 26 awg stranded wire for data. Because of its high attenuation, type 6 is used only in patch panels or to connect devices to/from wall jacks . Attenuation for type 6 cable is 3/2 x type 1 cable (attenuation for 66 m of type 6 =...

  • Page 29

    Trxmim operating specifications page 2-8 2.4 trxmim operating specifications this section describes the operating specifications for each of the active token ring concentrator modules. Cabletron systems reserves the right to change these specifications at any time without notice. 2.4.1 media filters...

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    Ring speeds page 2-9 each rj-45 connector is encased in a metallic shield which provides a means of connection for the stp cable shield. When stp patch cable is used, shield continuity is maintained by contacts within the female rj-45 that contact the metallic casing of the male rj-45 on the stp lob...

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    Trxmim operating specifications page 2-10 2.4.4 ring sequence when multiple token ring mims (set to the same ring speed) are installed in adjacent slots within an mmac, they are attached via the fnb and create a larger ring network. Multiple token ring mims are automatically attached (when possible)...

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    Hardware specifications page 2-11 2.5 other specifications 2.5.1 hardware specifications ports: trxmim-22a / 42a: 12 rj-45 trxmim-24a / 44a: 24 rj-45 backplane connections: fnb rings 1 - 4 cables supported: trxmim-42a / 44a: ibm type 1, 2, 6, 9 (stp) trxmim-22a / 24a: eia/tia category 3, 4, 5 (utp) ...

  • Page 33

    Other specifications page 2-12 2.5.4 service projections trxmim- 22a/42a trxmim- 24a/44a mtbf (mean time between failure) 592,098 hrs. 563,987 hrs. Mttr (mean time to repair).

  • Page 34

    Page 3-1 chapter 3 installing the trxmim this chapter contains instructions for installing the trxmim into a cabletron systems mmac product and for connecting token ring stations at the trxmim’s trunk coupling unit (tcu) ports. 3.1 general considerations if the trxmim is installed in a hub equipped ...

  • Page 35

    Installation page 3-2 fnb, (either an mmac-m3fnb, mmac-m5fnb, or an mmac-m8fnb). Without the fnb, the individual mims will not be linked, but rather will form independent token ring networks. Note: the fnb is a full-height, full-width backplane that links cabletron systems token ring products. Mmac-...

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    Setting the default ring speed jumper page 3-3 figure 3-8. Default ring speed jumper settings. 3.2.2 setting the default ring speed jumper in the absence of a management module with port assigning capability, the trxmim can not receive instructions to switch its ports between rings, so all ports are...

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    Installation page 3-4 figure 3-9. Installing the trxmim into the mmac 3.2.3 installing the trxmim into an mmac note: the installer should be prepared to monitor the lanview leds as described in section 3.2.4, boot-up check. Because the sequence may proceed rapidly, please read section 3.2.4 to prepa...

  • Page 38

    Boot-up check page 3-5 3.2.4 boot-up check the chart below describes the lanview led activity for three instances of trxmim operation. The first represents the moment of power-on. The second and third both represent possible post boot-up modes: management mode and default mode. Because this is prese...

  • Page 39

    Installation page 3-6 the led activity presented above represents a power-up with no cables connected to the trxmim. See section 4.2, lanview led signals, to determine appropriate activity for other start-up conditions. Because port assignments can be made only by a management module, the trxmim goe...

  • Page 40

    Connecting lobe cabling page 3-7 a type 3 media filter must be used when connecting the utp lobe cable from either of the active utp trxmims (trxmim-22a/24a) to a token ring station that is not equipped with an internal filter. A type 3 media filter, such as the cabletron systems trmf, provides impe...

  • Page 41

    Installation page 3-8 attaching lobe cabling at the module twisted pair lobe cabling from token ring stations can be connected to any trxmim port. To attach station cable at the trxmim: 1. Insert the male rj-45 connector from one end of the station’s lobe cable or type 3 patch cable into any tcu por...

  • Page 42

    Pre-operational testing page 3-9 3.2.6 pre-operational testing the trxmim should now be ready for operation. Before placing the network into service, proceed to chapter 4, testing and troubleshooting and test the installation thoroughly to be sure that all stations are able to be addressed and that ...

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    Page 4-1 chapter 4 testing and troubleshooting this section contains procedures to verify that the connections between the trxmim and the token ring stations are functioning properly. A description of the lanview led system is also provided. 4.1 installation checkout perform the following check to c...

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    Lanview led signals page 4-2 c. Check that the mims in the mmac are grouped together according to network type and ring capacity. For example, all ethernet mims together, all port switching token ring mims together, all single-ring token ring mims together. 4. Confirm that the maximum cable length f...

  • Page 45

    Lanview led definitions table page 4-3 4.2.1 lanview led definitions table the locations shown and the following definitions apply to lanview leds of all four trxmims (model -24a is shown in the figure), except that ports 13 through 24 and the leds associated with them are not present on the trxmim-...

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    Lanview led signals page 4-4 note: “linked” describes an electromechanical connection between a concentrator module’s tcu port and a station. “inserted” describes a data connection between a station and a lan (via the concentrator module). 4.2.2 err - error this led should not turn on during normal ...

  • Page 47

    Mgmt - management mode page 4-5 command, they operate as isolated rings, just like the auxiliary rings. Bypass mode does not necessarily mean that the trxmim is devoid of network activity. Even if all fnb channels are bypassed from the backplane, the trxmim may host up to six active lans. Management...

  • Page 48

    Lanview led signals page 4-6 assignments take effect immediately at start-up, but are relevant only if the module boots into default mode. In default mode, although the leds will be yellow for fnb rings 2, 3, 4 and aux rings 1, 2, the rings will still be inaccessible. In management mode, all ring sp...

  • Page 49

    Port - port status page 4-7 4.2.7 port - port status this led indicates the status of the connection at the tcu. If at power-on, the led for any port is: red, the port is disabled. At power on, all ports are looped back (disabled) until the module comes out of bypass mode and returns to normal opera...

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    Lanview led signals page 4-8 if, during normal operation, the led for a ring out port is: green, the ring out port is active (carrying data) and inserted into the ring. Blinking red, the ring out port is in a normal inactive state. This is equivalent to off for a lobe port during normal operation. R...

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    Page a-1 appendix a introduction to four-ring fnb functionality a.1 introduction this appendix addresses only token ring network applications. It is intended to introduce and explain the closely related concepts of port switching and the four-ring flexible network bus (fnb). These concepts reflect r...

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    Fnb operations without port switching page a-2 right-wrapping abilities may “wrap” (bypass) their ring in /ring out connections, effectively segmenting the fnb into two or more smaller, isolated token ring lans, as illustrated in figure a-1. Figure a-1. Fnb segmentation produces two isolated fnb rin...

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    Fnb operations with port switching page a-3 management of segmented fnb rings if the fnb is segmented, as shown in figure a-1, the modules on one segment are isolated from modules on another fnb segment; management interfaces with one ring are isolated from other fnb segments as well. Therefore, to ...

  • Page 54

    Fnb operations with port switching page a-4 figure a-3. Mixed mims figure a-4. Port assignment and port switching trmim trmim trmim trmim trmims trxmim trxmim trxmim trxmims fnb ring 1 fnb ring 2 fnb ring 3 fnb ring 4 segmented fnb ring 1 trmm-2 fnb ring 1 fnb ring 2 fnb ring 4 fnb ring 3 port assig...

  • Page 55

    Configuration specifications page a-5 management for a management module to fully manage a ring, it requires a network-monitoring interface with the ring. Whereas single-ring management modules have only one network interface, port-assigning management modules provide for multiple ring interfaces, m...

  • Page 56

    Configuration specifications page a-6 ring and are not affected by the utilization of fnb rings 2, 3, or 4 by other mims in the mmac. Port switching mims do not have the ability to wrap (segment) the fnb; they are automatically and internally connected to the mims adjacent to them via the mmac chass...