BRIM-E6
USER’S GUIDE
CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03866-5005
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 software described in this manual is subject to change without
notice.
IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY
INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES
WHATSOEVER (INCLUDING BUT NOT LIMITED TO LOST PROFITS) ARISING
OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION CONTAINED
IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF, KNOWN, OR
SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAGES.
© Copyright August 1994 by:
Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved
Printed in the United States of America
Part Number: 9031027 August 1994
LANVIEW
MicroMMAC
Windows
Ethenet
CompuServe
is a registered trademark of Cabletron Systems, Inc.
and
BRIM
are trademarks of Cabletron Systems, Inc.
is a registered trademark of Microsoft Corp.
is a trademark of Xerox Corp.
is a registered trademark of CompuServe
Printed On Recycled Paper
BRIM-E6 USER’S GUIDE
i
NOTICE
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.
NOTE:
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment uses, generates, and can radiate radio frequency
energy and if not installed in accordance with the operator’s manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is
likely to cause interference in which case the user will be required to correct the
interference at his own expense.
WARNING:
approved by the party responsible for compliance could void the user’s authority to
operate the equipment.
Changes or modifications made to this device which are not expressly
DOC NOTICE
This digital apparatus does not exceed the Class A limits for radio noise emissions from
digital apparatus set out in the Radio Interference Regulations of the Canadian
Department of Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la class A prescrites dans le Règlement sur le
brouillage radioélectrique édicté par le ministère des Communications du Canada.
ii
BRIM-E6 USER’S GUIDE
CABLETRON SYSTEMS, INC.
PROGRAM LICENSE AGREEMENT
NOTICE
IMPORTANT
This document is an agreement between you, the end user, and Cabletron Systems, Inc.
(“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron
software program (the “Program”) contained in this package. The Program may be
contained in firmware, chips or other media. BY UTILIZING THE ENCLOSED
PRODUCT, YOU ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS
AGREEMENT, WHICH INCLUDES THE LICENSE AND THE LIMITATION OF
WARRANTY AND DISCLAIMER OF LIABILITY. IF YOU DO NOT AGREE TO THE
TERMS OF THIS AGREEMENT, PROMPTLY RETURN THE UNUSED PRODUCT
TO THE PLACE OF PURCHASE FOR A FULL REFUND.
: Before utilizing this product, carefully read this License Agreement.
CABLETRON SOFTWARE PROGRAM LICENSE
1. LICENSE.
in this package subject to the terms and conditions of this License Agreement.
You may not copy, reproduce or transmit any part of the Program except as permitted by
the Copyright Act of the United States or as authorized in writing by Cabletron.
THER RESTRICTIONS. You may not reverse engineer, decompile, or
2. O
disassemble the Program.
3. APPLICABLE LA
under the laws and in the state and federal courts of New Hampshire. You accept the
personal jurisdiction and venue of the New Hampshire courts.
You have the right to use only the one (1) copy of the Program pro vided
W. This License Agreement shall be interpreted and governed
EXCLUSION OF WARRANTY AND DISCLAIMER OF
LIABILITY
1. EXCLUSION OF
Cabletron in writing, Cabletron makes no warranty, expressed or implied, concerning the
Program (including Its documentation and media).
CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED
TO YOU BY CABLETRON IN WRITING, EITHER EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF
MERCHANTABLITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH
RESPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS,
AND ANY ACCOMPANYING HARDWARE.
BRIM-E6 USER’S GUIDE
WARRANTY. Except as may be specifically provided by
iii
NOTICE
2. NO LIABILITY FOR CONSEQ
CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES
WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF
BUSINESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS
INFORMATION, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR RELIANCE
DAMAGES, OR OTHER LOSS) ARISING OUT OF THE USE OR INABILITY TO
USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS BEEN ADVISED
OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO NOT
ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR
CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR ON THE DURATION OR
LIMITATION OF IMPLIED WARRANTEES IN SOME INSTANCES THE ABOVE
LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.
UENTIAL DAMAGES. IN NO EVENT SHALL
UNITED STATES GOVERNMENT RESTRICTED RIGHTS
The enclosed product (a) was developed solely at pri vate expense; (b) contains “restricted
computer software” submitted with restricted rights in accordance with Section 52227-19
(a) through (d) of the Commercial Computer Software - Restricted Rights Clause and its
successors, and (c) in all respects is proprietary data belonging to Cabletron and/or its
suppliers.
For Department of Defense units, the product is licensed with “Restricted Rights” as
defined in the DoD Supplement to the Federal Acquisition Regulations, Section 52.2277013 (c) (1) (ii) and its successors, and use, duplication, disclosure by the Government is
subject to restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical
Data and Computer Software clause at 252.227-7013. Cabletron Systems, Inc., 35
Industrial Way. Rochester, New Hampshire 03867
iv
BRIM-E6 USER’S GUIDE
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION
1.1 USING THIS MANUAL................................................................... 1
1.2 GETTING HELP.............................................................................2
1.3 BRIM-E6 OVERVIEW..................................................................... 2
1.4 BRIM-E6 FEATURES.....................................................................2
1.5 BRIM-E6 SPECIFICATIONS.......................................................... 3
1.6 ETHERNET BRIDGING ................................................................. 4
1.7 RELATED MANUALS..................................................................... 6
CHAPTER 2 INSTALLATION
2.1 UNPACKING THE BRIM................................................................ 7
2.2 INSTALLING BRIMs.......................................................................7
2.2.1 Installing a BRIM-E6 in a MIM........................................... 8
2.2.2 Installing a BRIM in a Hub............................................... 10
2.2.3 Installing an EPIM into the BRIM.....................................11
CHAPTER 3 CONNECTING TO THE NETWORK
3.1 CONNECTING THE BRIM TO THE NETWORK.......................... 13
3.1.1 Connecting a UTP Segment to an EPIM-T...................... 13
3.1.2 Connecting a Fiber Optic Link Segment to
an EPIM-F1, EPIM-F2, or EPIM-F3.................................15
3.1.3 Connecting a Thin-Net Segment to an EPIM-C............... 17
3.1.4 Connecting an AUI Cable to an EPIM-A.......................... 19
3.1.5 Connecting an AUI Cable to an EPIM-X.......................... 20
3.2 FINISHING THE INSTALLATION................................................. 21
CHAPTER 4 USING THE LANVIEW LEDS
4.1 STB (Standby).............................................................................. 23
4.2 XMT (Transmit)............................................................................. 23
4.3 CLN (Collision) ............................................................................. 23
4.4 RCV (Receive).............................................................................. 23
BRIM-E6 USER’S GUIDE
v
CONTENTS
APPENDIX A EPIM SPECIFICATIONS
A.1 EPIM-T (10BASE-T TWISTED PAIR PORT)................................25
A.2 EPIM-F1 AND EPIM-F2 (MULTIMODE FIBER OPTIC PORTS)..26
A.3 EPIM-F3 (SINGLE MODE FIBER OPTIC PORT).........................27
A.4 EPIM-C (BNC PORT) ...................................................................29
A.5 EPIM-A AND EPIM-X (AUI PORTS).............................................30
APPENDIX B EPIM CABLE REQUIREMENTS
B.1 CABLE REQUIREMENTS ............................................................31
B.1.1 10BASE-T UTP and STP Cable Requirements ...............31
B.1.2 FOIRL/10BASE-FL Multimode Fiber Optic Cable
Requirements...................................................................33
B.1.3 FOIRL/10BASE-FL Single Mode Fiber Optic Cable
Requirements...................................................................34
B.1.4 10BASE-2 Thin-net Cable Requirements ........................35
B.1.5 AUI Cable Requirements .................................................36
INDEX
vi
BRIM-E6 USER’S GUIDE
CHAPTER 1
INTRODUCTION
Welcome to the Cabletron Systems
manual explains how to install the Bridge/Router Interface Module
(BRIM) for Ethernet into Cabletron products that support BRIM
technology (e.g., the EMM-E6 or MicroMMAC). It also explains
BRIM-E6 features and specifications.
BRIM-E6 User’s Guide
. This
1.1 USING THIS MANUAL
Read through this manual completely to familiarize yourself with its
content and to gain an understanding of the features and capabilities of
the BRIM-E6. A general w orking knowledge of Ethernet, and IEEE 802.3
type data communications networks and their physical layer components
is helpful when using the BRIM-E6.
Chapter 1,
specifications, and concludes with a list of related manuals.
Chapter 2,
Media Interface Module (MIM) or a stand-alone product. This chapter
also explains how to install an Ethernet Port Interface Module (EPIM)
into the BRIM.
Introduction
Installation
, describes BRIM-E6 features, lists
, describes how to install the BRIM-E6 into a
Chapter 3,
segments to the EPIM.
Chapter 4,
BRIM-E6 LEDs to monitor BRIM performance and status.
Appendix A,
EPIMs available for the BRIM-E6.
Appendix B,
each of the EPIMs.
BRIM-E6 USER’S GUIDE
Connecting to the Network
Using the LANVIEW LEDS
EPIM Specifications
EPIM Cable Requirements
, explains how to connect network
, describes how to use the
, lists specifications for each of the
lists cable requirements for
Page 1
CHAPTER 1:
INTRODUCTION
1.2 GETTING HELP
If you need additional support related to the BRIM-E6, or if you have any
questions, comments, or suggestions concerning this manual, contact
Cabletron Systems Technical Support:
By phone ..........................(603) 332-9400
Monday-Friday; 8am - 8pm EST
®
By CompuServe
.............GO CTRON from any! prompt
By Internet mail ...............support@ctron.com
1.3 BRIM-E6 OVERVIEW
The BRIM-E6 extends the functionality of your individual MIM or
stand-alone hub to include Ethernet bridging capability. The BRIM-E6
has one user-configurable Ethernet Port Interface Module (EPIM)
interface. Cabletron Systems offers a variety of EPIMs that support
connections for Unshielded Twisted Pair, Shielded Twisted Pair,
Multimode Fiber Optic, Single Mode Fiber Optic, AUI, or Thin Coaxial
cable.
1.4 BRIM-E6 FEATURES
Ethernet Bridging
The BRIM-E6 adds an Ethernet bridged connection to any Cabletron
device with a BRIM expansion port. Refer to section 1.6 for more
information about Ethernet bridging.
MIB Support
For information on how to extract and compile individual MIBs, contact
Cabletron Systems Technical Support (see
LANVIEW Diagnostic LEDs
Getting Help
Cabletron equips the BRIM-E6 with a visual diagnostic and monitoring
system called LANVIEW. LANVIEW LEDs help you quickly identify
Bridge and Link status.
Page 2
BRIM-E6 USER’S GUIDE
).
BRIM-E6 SPECIFICATIONS
EPIM Connectivity
EPIMs allow you to configure the BRIM-E6 to support a variety of media
types. Cabletron Systems offers the EPIMs shown in Table 1-1.
Table 1-1. EPIMs
EPIM MEDIA TYPE CONNECTOR
EPIM-A AUI DB15 (Female)
EPIM-C 10BASE-2 Thin Coaxial BNC
EPIM-T 10BASE-T Unshielded
RJ45
Twisted Pair
EPIM-X Standard Transceiv er DB15 (Male)
EPIM-F1 Multimode Fiber SMA
EPIM-F2 Multimode Fiber ST
EPIM-F3 Single Mode Fiber ST
1.5 BRIM-E6 SPECIFICATIONS
The operating specifications for the BRIM-E6 are described in this
section. Cabletron Systems reserves the right to change these
specifications at any time without notice.
Environmental Requirements
Operating T emperature: -5° to +40° C
°
Non-operating T emperature: -30
Operating Humidity: 5 to 95% (non-condensing)
to +90° C
Safety and Approvals
This unit meets the safety requirements of UL 1950, CSA C22.2 NO 950,
and EN 60950; the EMI requirements of FCC Class A and EN 55022
Class A; and the EMC requirements of EN 50082-1.
BRIM-E6 USER’S GUIDE
Page 3
CHAPTER 1:
INTRODUCTION
1.6 ETHERNET BRIDGING
Bridging Overview
Ethernet bridges read in packets and make decisions to filter or forward
based on the destination address of the packet. The simple filter/forward
decision process allows a bridge to segment traf fic between two networks,
keeping local traffic local. This process increases the availability of each
network while still allowing traffic destined for the opposite side of the
bridge to pass.
A bridge connects two networks together and allows communications
between the networks without the worry of distance violations or timing
considerations between the two networks. Each individual network must
be within maximum distance and timing specifications however. The
bridge is considered to be a node on the network and stores and forwards
packets on each network. Contrasted with a repeater that repeats the
signal bit by bit from one side of the network to the other, the bridge
actually reads each packet, checks the packet for accuracy, then makes a
decision, based on the destination address, as to whether the packet
should be sent to the other network. If the other network is busy, it is the
bridge's responsibility to store the packet, for a reasonable time, until the
transmission can be made.
It is also the responsibility of the bridge to handle collisions. If a collision
happens as the bridge is transmitting onto the second network, the bridge
is responsible for the back off and retransmission process. The original
sending node is not made aware of the collision. It assumes the packet has
been sent correctly. If for some reason the bridge is unable to send the
packet to its final destination, the original sending station, expecting a
response from the device it was attempting to contact, will "time out" and,
depending on the protocol, attempt retransmission.
The bridge makes decisions on whether to forward or filter a packet based
on the physical location of the destination device with respect to the
source device. Bridges dynamically learn the physical location of devices
by logging the source addresses of each packet and the bridge port the
packet was received on in a table called the Source Address Table (SAT).
Page 4
BRIM-E6 USER’S GUIDE
ETHERNET BRIDGING
As with repeaters, IEEE recommends a maximum number of bridges that
can be in a signal path. W ith repeaters we are able to ha v e a signal path of
4 repeaters, 5 segments. With bridges we can have a signal path of 7
bridges, 8 networks. The bridge count includes both local and remote
bridges.
Spanning Tree Algorithm
Since bridges play a very important role in the transfer of data from one
network to another, a helpful feature would be the ability to set up a
redundant bridge that would commence operation automatically if the
primary bridge failed. In the IEEE draft standard 802.1d, IEEE chose to
build some fault tolerance into the bridge specification. The 802.1d
specification defines bridge operation, redundancy and a process called
Spanning Tree Algorithm (STA). STA manages the primary and backup
bridges and also guards against data loops and duplicate data.
When a bridge is powered up, it goes through a series of self tests to
check its internal operation. During this time the bridge is in a standby , or
blocking condition and will not forward traffic. Also during this standby
period, the bridge sends out special bridge management packets called
Configuration Bridge Protocol Data Units (BPDU). A BPDU is 1 byte in
length and serves to identify the BPDU type as either a configuration or
topology change BPDU. Bridges use the BPDU packets as a way of
communicating with each other.
Spanning Tree Operation
Upon power up, Bridge 1 and 2 enter a standby, or blocking condition.
Bridge 2 transmits a Configuration BPDU from its root port claiming it is
the root. The BPDU is seen by Bridge 1 which inspects the BPDU for
address and priority along with other pertinent information. Assuming
equal priorities, Bridge 1 will transmit a BPDU to inform Bridge 2 of
Bridge 1's address and priority. Upon seeing the response from Bridge 1,
Bridge 2 determines that Bridge 1 has the higher priority and is therefore
the primary (or Root) bridge. Bridge 2 will remain in a standby or
blocking condition and will continue to monitor the network, listening for
Bridge 1 Configuration BPDUs. Once Bridge 1 is sure there are no data
loops, Bridge 1 comes on-line and normal network operations will
resume. This process is called spanning.
BRIM-E6 USER’S GUIDE
Page 5
CHAPTER 1:
INTRODUCTION
If Bridge 2 fails to receive the Bridge 1 BPDUs during the period defined
by "Hello Time", Bridge 2 will initiate a re-span by transmitting a
topology change BPDU and eventually come on line to carry the network
load.
Bridges using STA can be utilized to create very fault tolerant networks.
This section has presented only basic information about bridges and
Spanning Tree Algorithm. For additional information, refer to the IEEE
802.1d draft specification.
1.7 RELATED MANUALS
Use the following manuals to supplement the procedures, and other
technical data provided in this manual. This manual references procedures
in these manuals, where appropriate, but does not repeat them.
Cabletron Systems’
Cabletron Systems’
Cabletron Systems’
Cabletron Systems’
Cabletron Systems’
Cabletron Systems’
Cabletron Systems’
EMM-E6 Installation Guide
EMM-E6 Local Management Guide
ESXMIM Installation Guide
ESXMIM Local Management Guide
MicroMMAC User’s Guide
NBR-620/420/220 Installation Guide
NBR-620/420/220 Local Management Guide
Page 6
BRIM-E6 USER’S GUIDE
CHAPTER 2
INSTALLATION
This chapter contains instructions for installing your BRIM-E6 into a
Media Interface Module (MIM) or stand-alone product. It also explains
how to install an EPIM into the BRIM-E6.
Caution:
Observe all static precautions while handling MIMs and EPIMs.
2.1 UNPACKING THE BRIM
Unpack the BRIM as follows:
1) Remove the shipping box material covering the BRIM.
2) Carefully remove the module from the shipping box. Leave the
module in its non-conductive bag until you are ready to install.
3) After removing the module from its non-conductive bag, visually
inspect the device. If you notice any signs of damage, contact
Cabletron Systems Technical Support immediately.
2.2 INSTALLING BRIMs
This section contains procedures on how to install a BRIM to upgrade or
change the capabilities of your mother board. To install your BRIM, you
need the following tools:
• 1 disposable static wrist strap (provided with any MIM or hub)
• 2 support post screws (included in your BRIM package)
• 1 Phillips screwdriver.
You can install a BRIM in any Cabletron product that supports BRIM
technology (e.g., EMM-E6, MicroMMAC, etc.). The following
subsections provide generic instructions for installing a BRIM in a MIM
or in a stand-alone product. Refer to your specific MIM or hub
documentation for exact BRIM slot and connector locations.
BRIM-E6 USER’S GUIDE
Page 7
CHAPTER 2:
INSTALLATION
2.2.1 Installing a BRIM-E6 in a MIM
To install a BRIM-E6 in a MIM that supports BRIM technology (e.g.,
EMM-E6 or ESXMIM):
Note:
We recommend that you power-down your hub even though
Cabletron MIMs have “hot swap” capabilities.
1. Power-down your MMAC hub.
2. Disconnect all cables from the MIM. Note the ports to which these
cables attach.
3. Unscrew the top and bottom knurled knobs of the MIM face plate.
4. Slide out the MIM, and place it on its side with the internal
components facing up.
5. Remove the BRIM coverplate screws and the BRIM coverplate.
(See Figure 2-1.)
Page 8
Standoff
Coverplate
Figure 2-1. Removing the Coverplate
BRIM-E6 USER’S GUIDE
INSTALLING BRIMs
6. Place your BRIM behind the MIM face plate. (See Figure 2-2.)
BRIM-E6
LNK
EPIM-T
XMT
STB
RCV
CLN
Figure 2-2. Installing the BRIM
7. Insert the connector pins of the BRIM-E6 into the mother board
connector on the MIM.
8. Press down firmly on the back of the BRIM until the pins slide all
the way into the connector holes.
Note:
The BRIM-E6 connector must fit securely on the mother board
connector.
9. Reinstall the faceplate mounting screws, and install the support
post screws.
Note:
Faceplate and support post screws are provided both on the MIM
and in the BRIM package, for your convenience.
BRIM-E6 USER’S GUIDE
Page 9
CHAPTER 2:
INSTALLATION
2.2.2 Installing a BRIM in a Hub
To install a BRIM-E6 into a stand-alone hub that supports BRIM
technology (e.g., MicroMMAC or NBR-620):
1. Power-down your hub.
2. Disconnect all cables from the hub. Note the ports to which these
cables attach.
3. Remove the hub chassis cover.
Note:
Refer to your specific hub documentation for instructions on
removing the hub chassis cover.
4. Remove the BRIM coverplate screws and the BRIM coverplate.
(See Figure 2-1.)
5. Place your BRIM behind the hub face plate. (See Figure 2-2.)
6. Insert the connector pins of the BRIM into the mother board
connector in the hub.
7. Press down firmly on the back of the BRIM until the pins slide all
the way into the connector holes.
Note:
The BRIM-E6 connector must fit securely on the mother board
connector.
8. Reinstall the faceplate mounting screws, and install the support
post screws.
9. Reattach the chassis cover to the hub and reconnect the hub to your
network.
Note:
Faceplate and support post screws are provided both on the hub
and in the BRIM package, for your convenience.
Page 10
BRIM-E6 USER’S GUIDE
INSTALLING BRIMs
2.2.3 Installing an EPIM into the BRIM
To install an EPIM into the BRIM:
1. Slide the EPIM into the BRIM slot. See Figure 2-3.
STB
XMT
CLN
RCV
BRIM-E6
Figure 2-3. Installing an EPIM into the BRIM-E6
2. Press the EPIM connector firmly into the connector on the BRIM.
3. Tighten the EPIM screw.
BRIM-E6 USER’S GUIDE
Page 11
CHAPTER 3
CONNECTING TO THE NETWORK
This chapter outlines the procedure for connecting the BRIM-E6 to a
network.
3.1 CONNECTING THE BRIM TO THE NETWORK
The procedure for connecting network segments to the BRIM-E6 depends
on which EPIM you install. Refer to the following list and perform the
procedure described in the subsections that apply to your configuration:
• EPIM-T 3.1.1
• EPIM-F1, F2, F3 3.1.2
• EPIM-C 3.1.3
• EPIM-A 3.1.4
• EPIM-X 3.1.5
Prior to connecting the network cabling check the connectors for the
proper pinouts as shown in Appendix A.
3.1.1 Connecting a UTP Segment to an EPIM-T
Before connecting a segment to the EPIM-T, check each end of the
segment to determine if the wires have been crossed-over for the proper
connection. If the wires do not cross over, use the switch on the EPIM-T
to internally cross over the RJ45 port. Refer to Figure 3-1 to properly set
the EPIM-T cross-over switch.
BRIM-E6 USER’S GUIDE Page 13
CHAPTER 3: CONNECTING TO THE NETWORK
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC
5. NC
6. TX-
7. NC
8. NC
Position =
(not crossed over)
1. TX+
2. TX-
3. RX+
4. NC
5. NC
6. RX-
7. NC
8. NC
Figure 3-1. EPIM-T Cross-over Switch
To connect an EPIM-T to a Twisted Pair Segment:
1. Insert the RJ45 connector on the twisted pair segment into the RJ45
port on the EPIM. See Figure 3-1.
2. Check that the EPIM’s LNK LED is on. If the LED is not on, perform
each of the following steps until it is:
a. Check that the 10BASE-T device at the other end of the twisted
pair segment is powered up.
b. Verify that the RJ45 connector on the twisted pair segment has
the proper pinouts.
c. Check the cable for continuity.
d. Check that the twisted pair connection meets dB loss and cable
specifications outlined in Appendix B.
e. Check that the crossover switch is in the correct position.
If a link still has not been established, contact Cabletron Systems
Technical Support.
Page 14 BRIM-E6 USER’S GUIDE
CONNECTING THE BRIM TO THE NETWORK
3.1.2 Connecting a Fiber Optic Link Segment to an
EPIM-F1, EPIM-F2, or EPIM-F3
When connecting a fiber optic link segment to an EPIM-F1, F2, or F3
keep the following in mind:
• If you are connecting a fiber optic link segment with SMA 906
connectors to an EPIM-F1 with SMA ports, ensure that half
alignment sleeves are in place on each connector. A full alignment
sleeve will damage the receive port. SMA 905 connectors do not
need alignment sleeves.
• If you are connecting a fiber optic link segment with ST connectors
to an EPIM-F2 /F3 with ST ports, keep in mind that ST connectors
attach to ST ports much like BNC connectors attach to BNC ports.
Insert the connector into the port with the alignment key on the
connector inserted into the alignment slot on the port. The connector
is then turned to lock it down.
• The physical communication link consists of two strands of fiber
optic cabling: the Transmit (TX) and the Receive (RX). The
Transmit strand from the applicable port on the module will be
connected to the Receive port of a fiber optic Ethernet de vice at the
other end of the segment. For example, TX of the applicable port on
the module will go to RX of the other fiber optic device. The Recei ve
strand of the applicable port on the module will be connected to the
Transmit port of the fiber optic Ethernet device. F or example, RX of
the applicable port on the module will go to TX of the other fiber
optic device.
We recommend that you label the fiber optic cable to indicate which
fiber is Receive and which is Transmit. When you buy fiber optic
cable from Cabletron Systems, it is labeled so that: at one end of the
cable, one fiber is labeled 1, and the other fiber is labeled 2. This
pattern is repeated at the other end of the cable. If you did not
purchase your cable from Cabletron Systems, be sure you label your
cable as described above.
BRIM-E6 USER’S GUIDE Page 15
CHAPTER 3: CONNECTING TO THE NETWORK
Caution: Do not touch the ends of the fiber optic strands, and do
not let the ends come in contact with dust, dirt, or other
contaminants. Contamination of the ends can cause problems in
data transmissions. If the ends become contaminated, clean them
with alcohol using a soft, clean, lint free cloth.
To connect a fiber optic link segment to an EPIM-F1, EPIM-F2, or
EPIM-F3:
1. Remove the protective plastic covers from the fiber optic ports on the
applicable port on the module and from the ends of the connectors on
each fiber strand.
2. Attach the fiber labeled 1 to the applicable receive port, labeled RX,
on the module. See Figure 3-2.
F1
SMA 906 Connectors w/
Half Alignment Sleeves
SMA 905 Connectors
F2
ST Connectors
F3
ST Connectors
Figure 3-2. The EPIM-F1, EPIM-F2 and EPIM-F3
Page 16 BRIM-E6 USER’S GUIDE
CONNECTING THE BRIM TO THE NETWORK
3. Attach the fiber labeled 2 to the applicable transmit port labeled TX,
on the module.
4. At the other end of the fiber optic cable, attach the fiber labeled 1 to
the transmit port of the device.
5. Attach the fiber labeled 2 to the receive port.
6. Check that the EPIM’s LNK LED is on. If the LED is not on, perform
the following steps until it is:
a. Check that the power is turned on for the device at the other
end of the link.
b. Verify proper “receive to transmit” connection of fiber strands
between the applicable port on the module and the fiber optic
device at the other end of the fiber optic link segment.
c. Verify that the fiber connection meets the dB loss specifications
outlined in Appendix B.
If a link still has not been established, contact Cabletron Systems
Technical Support.
3.1.3 Connecting a Thin-Net Segment to an EPIM-C
To connect a thin-net segment to an EPIM-C, refer to Figure 3-3 and
perform the following steps:
1. Set the Internal Termination Switch to the right of the port and labeled
TERM to:
• The on position (•) if the thin-net segment connected directly to the
port will be internally terminated at the port.
• The off position (o) if the thin-net segment will not be terminated at
the port or externally terminated.
BRIM-E6 USER’S GUIDE Page 17
CHAPTER 3: CONNECTING TO THE NETWORK
2. If the Internal Termination switch is in the On position, connect the
thin-net segment directly to the BNC port as shown in
Figure 4-3.
3. If the Internal Termination switch is in the Off position:
a. Attach a BNC tee-connector to the BNC port on the module.
b. Attach the thin-net segment to one of the female connectors on
the tee-connector.
Note: You must terminate each segment attached to the tee-connector. If
you do not attach a segment to one of the female connections on the
tee-connector, then a terminator must be placed on that connection.
c. Attach another thin-coax segment or a terminator to the other
female connector on the tee-connector.
When internal termination switch
is set to off ( ):
Connect BNC tee-connector to port.
Attach a terminator or terminated
thin-net segment to one female
connector of tee-connector.
Connect a terminated thin-net
segment to other female connector
of tee-connector.
Attach thin-net segment directly to BNC
connector when internal termination
switch is set to on ( ).
Figure 3-3. The EPIM-C
Page 18 BRIM-E6 USER’S GUIDE
PW
R
CONNECTING THE BRIM TO THE NETWORK
3.1.4 Connecting an AUI Cable to an EPIM-A
Caution: Ensure that the external transceiver to which the BRIM-E6
will be connected does not have the signal quality error (SQE or
“heartbeat”) test function enabled. The BRIM-E6 will not operate if the
transceiver has the SQE test function enabled, and the network will be
unusable. Refer to the applicable transceiver manual.
To connect an EPIM-A to an external network segment:
1. Attach an external transceiver to the network segment that will be
connected to the AUI port. Refer to the applicable transceiver manual.
2. Attach an AUI cable, no longer than 50 meters in length, to the
transceiver connected to the network in step 1.
3. Connect the AUI cable to the AUI port located on the EPIM-A. See
Figure 3-4.
4. Lock the AUI connector into place using the connector slide latch.
Figure 3-4. The EPIM-A
5. Check that the PWR LED on the EPIM-A is on. If the LED is not on,
contact Cabletron Systems Technical Support.
BRIM-E6 USER’S GUIDE Page 19
CHAPTER 3: CONNECTING TO THE NETWORK
6. If the PWR LED is on with the AUI cable disconnected, continue with
the following checks:
a. Check the AUI connections for proper pinouts. The pinouts for
the transceiver connection are listed in Appendix A.
b. Check the cable for continuity.
c. Reconnect the AUI cable to the BRIM-E6 and the device.
If the LED is still not on after reconnecting the segment, contact
Cabletron Systems Technical Support.
3.1.5 Connecting an AUI Cable to an EPIM-X
Caution: The signal quality error (SQE) switch remains in the OFF
position for most network connections. However, some Data Terminal
Equipment (DTE) requires SQE. Refer to your DTE manual for SQE
requirement information.
To connect an EPIM-X to a device not requiring SQE:
1. Check that the SQE LED on the EPIM-X is off. If the SQE LED is on,
check the position of the SQE switch.
Note: If the SQE light remains on, even though the SQE switch is in
the OFF position, contact Cabletron Technical Support.
2. Attach one end of an AUI cable, no longer than 50 meters in length, to
the port located on the EPIM-X (Figure 3-5) and the other end to the
intended node.
Page 20 BRIM-E6 USER’S GUIDE
FINISHING THE INSTALLATION
ON Position
(Toward Back
of EPIM)
ON
OFF
OFF Position
(Toward Front
of EPIM)
Figure 3-5. The EPIM-X
3.2 FINISHING THE INSTALLATION
The BRIM-E6 is now ready for operation. Before placing the network
into service, test the installation thoroughly, making sure that you can
address all stations and that the BRIM-E6 and all stations are indicating
normal operation. Ensure that the networking software is configured
properly to match the installed network. If you encounter errors or
abnormal operation, contact Cabletron Systems Technical Support.
BRIM-E6 USER’S GUIDE Page 21
CHAPTER 4
USING THE LANVIEW LEDS
This chapter describes how to use the LANVIEW Diagnostic LEDs to
monitor BRIM status and diagnose BRIM problems.
BRIM-E6
STB
XMT
CLN
RCV
Figure 4-1. LANVIEW LEDS
4.1 STB (Standby)
• On - The bridge port is in the non-forwarding state. Possible causes
of this condition are: redundancy detected by Spanning Tree, data
link layer down, physical layer down, or port disabled.
• Off - The bridge port is in the forwarding state.
4.2 XMT (Transmit)
• On - The BRIM is transmitting packets.
• Off - No activity.
4.3 CLN (Collision)
• On - A collision has occurred on the BRIM port.
• Off - No activity.
4.4 RCV (Receive)
• On - The BRIM port is receiving packets.
• Off - No activity.
BRIM-E6 USER’S GUIDE Page 23
APPENDIX A
EPIM SPECIFICATIONS
This appendix provides specifications for Cabletron’s Ethernet Port
Interface Modules (EPIMs).
A.1 EPIM-T (10BASE-T TWISTED PAIR PORT)
Internal Transceiv er: Cabletron Systems TPT
10BASE-T Twisted Pair Transceiver
Type: 8 Pin RJ-45 Jack
A slide switch on the EPIM-T determines the cross over status of the
cable pairs. The switch residing on the X side indicates the pairs internally
cross over. If the switch resides on the = side, the pairs do not internally
cross over. See Fig. A-1.
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC
5. NC
6. TX-
7. NC
8. NC
Position =
(not crossed over)
1. TX+
2. TX-
3. RX+
4. NC
5. NC
6. RX-
7. NC
8. NC
Figure A-1. Cross-over Switch on the EPIM-T
BRIM-E6 USER’S GUIDE Page 25
APPENDIX A: EPIM SPECIFICATIONS
A.2 EPIM-F1 AND EPIM-F2 (MULTIMODE FIBER OPTIC
PORTS)
Internal Transceiver: Cabletron Systems FOT-F™
Fiber Optic Transceiver
Connector Type:
EPIM-F1: SMA fiber optic ports
EPIM-F2: ST fiber optic ports
Figure A-2. EPIM-F1 and EPIM-F2
Receive Sensitivity: -29.5 dBm
Maximum Receive Power: -8.2 dBm
Transmitter Power Into –
50/125 µm fiber: -13.0 dBm
62.5/125 µm fiber: -10.0 dBm
100/140 µm fiber: -7.0 dBm
Bit Error Rate: Better than 10
-10
Note: The above transmitter power and receive sensitivity levels represent
Peak Power Levels after optical overshoot. You must use a Peak Power
Meter to correctly compare the above values to those you measure on any
particular port. If you measure Power Levels with an Average Power
Meter, you must subtract 3 dBm from the measurement to correctly
compare measured values to the above values
Page 26 BRIM-E6 USER’S GUIDE
EPIM-F3 (SINGLE MODE FIBER OPTIC PORT)
(e.g., -29.5 dBm peak = -32.5 dBm average).
A.3 EPIM-F3 (SINGLE MODE FIBER OPTIC PORT)
Internal Transceiver: Cabletron Systems FOT-F3™
Fiber Optic Transceiver
Connector Type: ST fiber optic ports
Figure A-3. EPIM-F3
Parameter Typical Minimum Maximum
Transmitter Peak
Wave Length: 1300 nm 1270 nm 1330 nm
Spectral Width: 60 nm — 100 nm
Rise Time: 3.0 ns 2.7 ns 5.0 ns
Fall Time: 2.5 ns 2.2 ns 5.0 ns
Duty Cycle: 50.1% 49.6% 50.7%
Note: Transmitter power is inversely proportional to temperature rise.
Use the Output Power Coefficient to calculate increased or decreased
power output for your operating environment. For example, typical
BRIM-E6 USER’S GUIDE Page 27
APPENDIX A: EPIM SPECIFICATIONS
power output at 25C equals -16.4 dBm. For a 4C temperature increase,
multiply the typical coefficient (-0.15 dBm) by four, and add the result to
typical output power (4 x -0.15 dBm + -16.4 dBm = -17.0 dBm)
Parameter Typical
Transmit Power: -15.1 dBm
Transmit Budget: 14.4 dBm
Receive Sensitivity: -29.5 dBm
Maximum Receive
-6.99 dBm
Power:
Bit Error Rate: Better than
-10
10
Note: The above transmitter power levels and receive sensitivity levels
represent Peak Power Levels after optical overshoot. You must use a Peak
Power Meter to correctly compare the above values to those you measure
on any particular port. If you measure Power Levels with an Average
Page 28 BRIM-E6 USER’S GUIDE
EPIM-C (BNC PORT)
Power Meter, you must subtract 3 dBm from the measurement to correctly
compare those measured values to the values listed above (e.g., -29.5 dBm
peak = -32.5 dBm average).
A.4 EPIM-C (BNC PORT)
Internal Transceiv er: Cabletron Systems TMS-3™ Transceiver
Connector Type: BNC receptacle, with gold center contact,
for use with BNC type tee-connectors and
RG-58 thin-net cable.
Internal Termination Switch
= On (internally terminated)
= Off (need external termination)
Figure A-4. EPIM-C (with BNC Port)
T ermination: Using the switch to the side of the port, you can
internally terminate the port on the module via
a built-in 50 ohm terminator. This eliminates
the need to connect the port to a tee-connector
and terminator.
Grounding: For safety, connect only one end of a thin-net
segment to earth ground. Do not connect the
BNC port of an EPIM-C to earth ground.
BRIM-E6 USER’S GUIDE Page 29
APPENDIX A: EPIM SPECIFICATIONS
Warning: Connecting a thin-net segment to earth ground at more than one
point could produce dangerous ground currents.
A.5 EPIM-A AND EPIM-X (AUI PORTS)
Connector Type: DB-15 (15 position D type receptacle)
EPIM-A: Female Connector
EPIM-X: Male Connector
Figure A-5. EPIM-A and EPIM-X (AUI Port)
Pin 1 Logic Ref. Pin 9 Collision -
2 Collision + 10 Transmit 3 Transmit + 11 Logic Ref.
4 Logic Ref. 12 Receive 5 Receive + 13 Power (+12 Vdc)
6 Power Return 14 Logic Ref.
7 No Connection 15 No Connection
8 Logic Ref.
Connector Shell: Protective Ground
Page 30 BRIM-E6 USER’S GUIDE
APPENDIX B
EPIM CABLE REQUIREMENTS
This appendix describes cable specifications and requirements for the
EPIMs. Your network must meet the requirements and conditions
specified in this chapter to obtain satisfactory performance from this
equipment. Failure to follow these guidelines could result in poor network
performance.
B.1 CABLE REQUIREMENTS
The Ethernet Port Interface Modules (EPIMs) let you expand your
network using UTP, STP, Multimode Fiber Optic, Single Mode Fiber
Optic, Thin Coaxial, or AUI cabling.
Take care in planning and preparing the cabling and connections for your
network. The quality of the connections and the length of cables are
critical factors in determining the reliability of your network. The
following sections describe specifications for each media type.
B.1.1 10BASE-T UTP and STP Cable Requirements
When you connect a 10BASE-T Twisted Pair Segment to the EPIM-T , the
device at the other end of the twisted pair segment must meet IEEE 802.3
10BASE-T specifications. Your network must meet the following
requirements:
Length
The IEEE 802.3 10BASE-T standard requires that 10BASE-T devices
transmit over a 100 meter (328 foot) link using 22-24 AWG unshielded
twisted pair wire. However, cable quality largely determines maximum
link length. If you use high quality , low attenuation cable, you can achie ve
link lengths of up to 200 meters. Cable delay limits maximum link length
to 200 meters, regardless of the cable type.
BRIM-E6 USER’S GUIDE Page 31
APPENDIX B: EPIM CABLE REQUIREMENTS
Insertion Loss
The maximum insertion loss allowed for a 10BASE-T link is 11.5 dB at
all frequencies between 5.0 and 10 MHz. This includes the attenuation of
the cables, connectors, patch panels, and reflection losses due to
impedance mismatches in the link segment.
Impedance
Cabletron Systems 10BASE-T Twisted Pair products will work on twisted
pair cable with 75 to 165 ohms impedance. Unshielded twisted pair cables
typically have an impedance of between 85 to 110 ohms.
Shielded twisted pair cables, such as IBM Type 1 cable, can also be used.
You should remember that the impedance of IBM Type 1 cable is
typically 150 ohms. This increases the signal reflection caused by the
cable, but since the cable is shielded, this signal reflection has little effect
on the received signal’s quality due to the lack of crosstalk between the
shielded cable pairs.
Jitter
Intersymbol interference and reflections can cause jitter in the bit cell
timing, resulting in data errors. A 10BASE-T link must not generate more
than 5.0 nsec. of jitter. If your cable meets the impedance requirements
for a 10BASE-T link, jitter should not be a concern.
Delay
The maximum propagation delay of a 10BASE-T link segment must not
exceed 1000 nsec. This 1000 nsec. maximum delay limits the maximum
link segment length to no greater than 200 meters.
Crosstalk
Crosstalk is caused by signal coupling between the different cable pairs
contained within a multi-pair cable bundle. 10BASE-T transceivers are
designed so that the user does not need to be concerned about cable
crosstalk, provided the cable meets all other requirements.
Noise
Noise can be caused by either crosstalk or externally induced impulses.
Impulse noise may cause data errors if the impulses occur at very specific
times during data transmission. Generally , the user need not be concerned
about noise. If noise-related data errors are suspected, it may be necessary
to either reroute the cable or eliminate the source of the impulse noise.
Page 32 BRIM-E6 USER’S GUIDE
CABLE REQUIREMENTS
Temperature
Multi-pair PVC 24 AWG telephone cables typically have an attenuation
of approximately 8 to 10 dB/100m at 20°C (78°F). The attenuation of
PVC insulated cable varies significantly with temperature. At
temperatures greater than 40°C (104°F), we strongly recommend that you
use plenum-rated cables to ensure that cable attenuation remains within
specification.
B.1.2 FOIRL/10BASE-FL Multimode Fiber Optic Cable
Requirements
Table B-1 shows Multimode Fiber Optic Cable specifications for the
EPIM-F1 and EPIM-F2 modules.
Table B-1. Multimode Fiber Optic Cable Specifications
Cable Type Attenuation Maximum Cable Length
50/125 µm 13.0 dB or less The maximum allowable fiber
62.5/125 µm 16.0 dB or less
100/140 µm 19.0 dB or less
optic cable length is 2 km
(2187.2 yards). However, IEEE
802.3 specifications
allow for a maximum of 1 km
(1093.6 yards).
Attenuation
You must test the fiber optic cable with a fiber optic attenuation test set
adjusted for an 850 nm wavelength. This test verifies that the signal loss
in a cable is within an acceptable level. Table B-1 shows the attenuation
for each Multimode cable type.
Fiber Optic Budget and Propagation Delay
When determining the maximum fiber optic cable length, the fiber optic
budget delay and total network propagation should be calculated and
taken into consideration before fiber optic cable runs are incorporated in
any network design.
Fiber optic budget is the combination of the optical loss due to the fiber
optic cable, in-line splices, and fiber optic connectors.
BRIM-E6 USER’S GUIDE Page 33
APPENDIX B: EPIM CABLE REQUIREMENTS
Propagation delay is the amount of time it takes data to travel from the
sending device to the receiving device. Total propagation delay allowed
for the entire network is 25.6 µsec, if the total propagation delay between
any two nodes on the network exceeds 25.6 µsec, then bridges should be
used.
B.1.3 FOIRL/10BASE-FL Single Mode Fiber Optic Cable
Requirements
Table B-2 shows Single Mode Fiber Optic cable specifications for the
EPIM-F3.
Table B-2. Single Mode Fiber Optic Cable Specifications
Cable Type Attenuation Maximum Cable Length
8/125-12/125 µm 10.0 dB or less The maximum allowable fiber
optic cable length is
5 km (3.1 miles) with bridges at
each segment end. However,
IEEE 802.3 FOIRL
specifications specify a
maximum of 1 km (1093.6
yards).
Attenuation
You must test the fiber optic cable with a fiber optic attenuation test set
adjusted for an 1300 nm wavelength. This test verifies that the signal loss
in a cable is 10.0 dB or less for any given single mode fiber optic link.
Fiber Optic Budget and Propagation Delay
Fiber optic budget is the combination of the optical loss due to the fiber
optic cable, in-line splices, and fiber optic connectors. When determining
the maximum fiber optic cable length, the fiber optic budget (total loss of
10.0 dB or less between stations) and total network propagation delay
should be calculated and considered before fiber optic cable runs are
incorporated in any network design.
Page 34 BRIM-E6 USER’S GUIDE
CABLE REQUIREMENTS
Propagation delay is the amount of time it takes data to travel from the
sending device to the receiving device. Total propagation delay allowed
for the entire network is 25.6 µsec, if the total propagation delay between
any two nodes on the network exceeds 25.6 µsec, then bridges should be
used.
B.1.4 10BASE-2 Thin-net Cable Requirements
When you connect a thin-net segment to the EPIM-C, your network must
meet the following requirements:
Cable Type
50 ohm RG-58A/U type coaxial cable must be used when making up a
thin-net cable segment.
Length
The thin-net segment must be no longer than 185 meters.
Terminators
A 50 ohm terminator must be connected to the far end of each thin-net
segment.
Connectors
A maximum of 29 tee-connectors may be used throughout the length of
cable segment for host connections. If an excessive number of barrel
connectors are used within the cable segment, such as finished wall plates
with BNC feed-throughs, then a reduced number of host connections may
be required. For special network design, contact Cabletron Systems
Technical Support.
Grounding
For safety, ground only one end of a thin-net segment. Do NOT connect
EPIM BNC ports to earth ground.
Warning: Connecting a thin-net segment to earth ground at more than one
point could produce dangerous ground currents.
BRIM-E6 USER’S GUIDE Page 35
APPENDIX B: EPIM CABLE REQUIREMENTS
B.1.5 AUI Cable Requirements
When you connect an external network segment to t an EPIM-A or EPIMX, the AUI cable must meet the following requirements:
AUI Cable
The AUI cable connecting the module to a device must be IEEE 802.3
type cable.
Length
The AUI Cable must not exceed 50 meters in length. If 28 AWG thin
office drop A UI cable is used, then the maximum cable length is limited to
50 feet (15.24 meters).
Grounding
The connector shell of the EPIM-A and the EPIM-X are connected to
ground.
Page 36 BRIM-E6 USER’S GUIDE
INDEX
C
Cabletron Systems Technical
Support
2
E
Environmental Requirements 3
EPIMs
Available Modules
Cable Requirements
36
AUI
Multimode Fiber 33
Single Mode Fiber 34
Thin-net 35
UTP and STP 31
Connecting to the Network
EPIM-A
EPIM-C 17
EPIM-F1 15
EPIM-F2 15
EPIM-F3 15
EPIM-T 13
EPIM-X 20
Specifications
EPIM-A
EPIM-C 29
EPIM-F1 26
EPIM-F2 26
EPIM-F3 27
EPIM-T 25
EPIM-X 30
Ethernet Bridging
Overview
4
Spanning Tree Algorithm 5
Spanning Tree Operation 5
3
19
30
I
Installation
Installing a BRIM in a Hub
Installing a BRIM-E6 in a
8
MIM
Installing an EPIM into the
11
BRIM
L
LANVIEW LEDS 23
M
MIB Support 2
S
Safety and Approvals 3
10
Index-1
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